% Encoding: UTF-8

@Article{Couairon2006,
  author    = {A. Couairon * and J. Biegert and C. P. Hauri and W. Kornelis and F. W. Helbing and U. Keller and A. Mysyrowicz},
  title     = {Self-compression of ultra-short laser pulses down to one optical cycle by filamentation},
  journal   = {J. Mod. Opt.},
  year      = {2006},
  volume    = {53},
  pages     = {75--85},
  doi       = {10.1080/09500340500227760},
  eprint    = {https://doi.org/10.1080/09500340500227760},
  owner     = {NAG},
  publisher = {Taylor \& Francis},
  timestamp = {2019.02.14},
  url       = { 
 https://doi.org/10.1080/09500340500227760
 
},
}

@Article{Suminas2016,
  author    = {R. \v{S}uminas and G. Tamo\v{s}auskas and G. Valiulis and A. Dubietis},
  title     = {Spatiotemporal light bullets and supercontinuum generation in {$\beta$}-{BBO} crystal with competing quadratic and cubic nonlinearities},
  journal   = {Opt. Lett.},
  year      = {2016},
  volume    = {41},
  pages     = {2097--2100},
  month     = {May},
  abstract  = {We experimentally study filamentation and supercontinuum generation in a birefringent medium \[beta-barium borate (\&\#x03B2;-BBO) crystal\] pumped by intense 90 fs, 1.8 \&\#x03BC;m laser pulses whose carrier wavelength falls in the range of anomalous group velocity dispersion of the crystal. We demonstrate that the competition between the intrinsic cubic and cascaded-quadratic nonlinearities may serve as a useful tool for controlling the self-action effects via phase matching condition. In particular, we found that spectral superbroadening of the ordinary polarization is linked to three-dimensional self-focusing and formation of self-compressed spatiotemporal light bullets that could be accessed within a certain range of either positive or negative phase mismatch. In the extraordinary polarization, we detect giant spectral shifts of the second harmonic radiation, which are attributed to a light bullet-induced self-phase matching.},
  doi       = {10.1364/OL.41.002097},
  keywords  = {Pulse compression; Ultrafast phenomena; Supercontinuum generation; Laser materials processing; Nonlinear effects; Phase matching; Refractive index; Self action effects; Ultrafast nonlinear optics},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-41-9-2097},
}

@Article{Akozbek2003,
  author    = {Ak{\"o}zbek, N. and Becker, A. and Scalora, M. and Chin, S.L. and Bowden, C.M.},
  title     = {Continuum generation of the third-harmonic pulse generated by an intense femtosecond IR laser pulse in air},
  journal   = {Appl. Phys. B},
  year      = {2003},
  volume    = {77},
  pages     = {177--183},
  month     = {Sep},
  issn      = {1432-0649},
  abstract  = {The continuum generation by intense femtosecond IR laser pulses focused in air including the effect of third-harmonic generation is investigated. We have used a theoretical model that includes the full spatio-temporal dynamics of both the fundamental and the third-harmonic pulses. Results of our numerical calculations show that a two-color filamentation effect occurs, in which the third-harmonic conversion efficiency remains almost constant over the whole filament length. It is found that this effect is rather independent of the wavelength of the input beam and the focal geometry. During the filamentation process the third-harmonic pulse itself generates a broad continuum, which can even overlap with the continuum of the fundamental pulse for the longer pump wavelengths. In consequence, the continuum generation generated by intense IR laser pulses is further extended into the UV. },
  day       = {01},
  doi       = {10.1007/s00340-003-1199-2},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1007/s00340-003-1199-2},
}

@Article{Akozbek2002,
  author    = {Ak\"ozbek, N. and Iwasaki, A. and Becker, A. and Scalora, M. and Chin, S. L. and Bowden, C. M.},
  title     = {Third-Harmonic Generation and Self-Channeling in Air Using High-Power Femtosecond Laser Pulses},
  journal   = {Phys. Rev. Lett.},
  year      = {2002},
  volume    = {89},
  pages     = {143901},
  month     = {Sep},
  doi       = {10.1103/PhysRevLett.89.143901},
  issue     = {14},
  numpages  = {4},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.89.143901},
}

@Article{Andriukaitis2011,
  author    = {Giedrius Andriukaitis and Tadas Bal\v{c}i\={u}nas and Skirmantas Ali\v{s}auskas and Audrius Pug\v{z}lys and Andrius Baltu\v{s}ka and Tenio Popmintchev and Ming-Chang Chen and Margaret M. Murnane and Henry C. Kapteyn},
  title     = {90~{GW} peak power few-cycle mid-infrared pulses from an optical parametric amplifier},
  journal   = {Opt. Lett.},
  year      = {2011},
  volume    = {36},
  pages     = {2755--2757},
  month     = {Aug},
  abstract  = {We demonstrate a compact 20вЂ‰Hz repetition-rate mid-IR OPCPA system operating at a central wavelength of 3900вЂ‰nm with the tail-to-tail spectrum extending over 600вЂ‰nm and delivering 8вЂ‰mJ pulses that are compressed to 83вЂ‰fs (\&lt;7 optical cycles). Because of the long optical period ($\sim$13вЂ‰fs) and a high peak power, the system opens a range of unprecedented opportunities for tabletop ultrafast science and is particularly attractive as a driver for a highly efficient generation of ultrafast coherent x-ray continua for biomolecular and element specific imaging.},
  doi       = {10.1364/OL.36.002755},
  keywords  = {Parametric oscillators and amplifiers; Ultrafast nonlinear optics; Laser materials; Optical amplifiers; Phase conjugation; Phase matching; Regenerative amplification; Strong field physics},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-36-15-2755},
}

@Article{Ariunbold2012,
  author    = {Gombojav O. Ariunbold and Pavel Polynkin and Jerome V. Moloney},
  title     = {Third and fifth harmonic generation by tightly focused femtosecond pulses at 2.2~\si{\micro\metre} wavelength in air},
  journal   = {Opt. Express},
  year      = {2012},
  volume    = {20},
  pages     = {1662--1667},
  month     = {Jan},
  abstract  = {We report experiments on the generation of third and fifth harmonics of millijoule-level, tightly focused, femtosecond laser pulses at 2.2 $\mu$m wavelength in air. The measured ratio of yields of the third and fifth harmonics in our setup is found equal to 2 {\textperiodcentered} 10{\textminus}4. This result contradicts the recent suggestion that the Kerr effect in air saturates and changes sign in ultra-intense optical fields.},
  doi       = {10.1364/OE.20.001662},
  keywords  = {Harmonic generation and mixing ; Kerr effect; Ultrafast nonlinear optics; Femtosecond pulses; Harmonic generation; Kerr effect; Laser beams; Nonlinear optics; Optical fields},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-20-2-1662},
}

@Article{Ashcom2006,
  author    = {Jonathan B. Ashcom and Rafael R. Gattass and Chris B. Schaffer and Eric Mazur},
  title     = {Numerical aperture dependence of damage and supercontinuum generation from femtosecond laser pulses in bulk fused silica},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2006},
  volume    = {23},
  pages     = {2317--2322},
  month     = {Nov},
  abstract  = {Competing nonlinear optical effects are involved in the interaction of femtosecond laser pulses with transparent dielectrics: supercontinuum generation and multiphoton-induced bulk damage. We measured the threshold energy for supercontinuum generation and bulk damage in fused silica using numerical apertures (NAs) ranging from 0.01 to 0.65. The threshold for supercontinuum generation exhibits a minimum near 0.05NA and increases quickly above 0.1 NA. For NAs greater than 0.25, we observe no supercontinuum generation. The extent of the blue broadening of the supercontinuum spectrum decreases significantly as the NA is increased from 0.01 to 0.08, showing that weak focusing is important for generating the broadest supercontinuum spectrum. Using a light-scattering technique to detect the onset of bulk damage, we confirmed bulk damage at all NAs studied. At a high NA, the damage threshold is well below the critical power for self-focusing.},
  doi       = {10.1364/JOSAB.23.002317},
  keywords  = {Laser-induced breakdown; Silica; Self-focusing; Femtosecond phenomena; Femtosecond pulses; Fiber Bragg gratings; Fused silica; Nonlinear effects; Self phase modulation; Supercontinuum generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-23-11-2317},
}

@Article{Bejot2014,
  Title                    = {Harmonic Generation and Nonlinear Propagation: When Secondary Radiations Have Primary Consequences},
  Author                   = {B\'ejot, P. and Karras, G. and Billard, F. and Hertz, E. and Lavorel, B. and Cormier, E. and Faucher, O.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2014},

  Month                    = {May},
  Pages                    = {203902},
  Volume                   = {112},

  Doi                      = {10.1103/PhysRevLett.112.203902},
  Issue                    = {20},
  Numpages                 = {5},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.14},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.112.203902}
}

@Article{Bache2012,
  author    = {Morten Bache and Falk Eilenberger and Stefano Minardi},
  title     = {Higher-order {K}err effect and harmonic cascading in gases},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {4612--4614},
  month     = {Nov},
  abstract  = {The higher-order Kerr effect (HOKE) has recently been advocated to explain measurements of the saturation of the nonlinear refractive index in gases. Here we show that cascaded third-harmonic generation results in an effective fifth-order nonlinearity that is negative and significant. Higher-order harmonic cascading will also occur from the HOKE, and the cascading contributions may significantly modify the observed nonlinear index change. At lower wavelengths, cascading increases the HOKE saturation intensity, while for longer wavelengths cascading will decrease the HOKE saturation intensity.},
  doi       = {10.1364/OL.37.004612},
  keywords  = {Harmonic generation and mixing ; Kerr effect; Nonlinear optics, materials; Pulse propagation and temporal solitons ; Ultrafast nonlinear optics; Harmonic generation; Kerr effect; Kerr media; Phase shift; Phase velocity; Refractive index},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-22-4612},
}

@Book{HOO_V4_2009,
  Title                    = {Handbook of Optics},
  Author                   = {Michael Bass and Casimer DeCusatis and Jay M. Enoch and Vasudevan Lakshminarayanan and Guifang Li and Carolyn A. Macdonald and Virendra N. Mahajan and Eric W. Van Stryland},
  Publisher                = {McGraw-Hill},
  Year                     = {2009},
  Edition                  = {3rd},
  Volume                   = {4},

  Owner                    = {NAG},
  Timestamp                = {2019.02.07}
}

@Article{Biegert2012,
  author    = {J. Biegert and P. K. Bates and O. Chalus},
  title     = {New Mid-Infrared Light Sources},
  journal   = {IEEE J. Sel. Topics Quantum Electron.},
  year      = {2012},
  volume    = {18},
  pages     = {531--540},
  month     = {Jan},
  issn      = {1077-260X},
  doi       = {10.1109/JSTQE.2011.2135842},
  keywords  = {high-speed optical techniques;infrared sources;optical parametric oscillators;midinfrared light sources;ultrashort pulses;biological investigations;spectroscopic investigations;strong-field physics investigations;pulse-to-pulse RMS stability;OPCPA;repetition rate;time 67 fs;wavelength 3.2 micron;energy 3.8 muJ;Laser excitation;Laser stability;Optical pulse generation;Pump lasers;Chirp;Bandwidth;Oscillators;Mid-IR;nonlinear optics;OPCPA;ultrashort pulses},
  owner     = {NAG},
  timestamp = {2019.02.07},
}

@Article{Borchers2012,
  author    = {Bastian Borchers and Carsten Br\'{e}e and Simon Birkholz and Ayhan Demircan and G\"{u}nter Steinmeyer},
  title     = {Saturation of the all-optical {K}err effect in solids},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {1541--1543},
  month     = {May},
  abstract  = {We discuss the influence of the higher-order Kerr effect (HOKE) in wide bandgap solids at extreme intensities below the onset of optically induced damage. Using different theoretical models, we employ multiphoton absorption rates to compute the nonlinear refractive index by a Kramers\&\#x2013;Kronig transform. Within this theoretical framework we provide an estimate for the appearance of significant deviations from the standard optical Kerr effect predicting a linear index change with intensity. We discuss the role of the observed saturation behavior in practically relevant situations, including Kerr lens mode-locking and supercontinuum generation in photonic crystal fibers. Furthermore, we present experimental data from a multiwave mixing experiment in BaF2, which can be explained by the appearance of the HOKE.},
  doi       = {10.1364/OL.37.001541},
  keywords  = {Kerr effect; Multiphoton processes; Optical nonlinearities of condensed matter; Electric fields; Kerr effect; Nonlinear wave mixing; Photonic crystal fibers; Refractive index; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-9-1541},
}

@Article{Bradler2009,
  author    = {Bradler, M. and Baum, P. and Riedle, E.},
  title     = {Femtosecond continuum generation in bulk laser host materials with sub-~\si{\micro\joule} pump pulses},
  journal   = {Appl. Phys. B},
  year      = {2009},
  volume    = {97},
  pages     = {561},
  month     = {Aug},
  issn      = {1432-0649},
  abstract  = {We report a comprehensive investigation of femtosecond continuum generation in single crystals of several common laser host materials. The absolute spectral energy density, pulse-to-pulse stability, pump threshold, and beam profile are studied in dependence on the focusing conditions, crystal thickness, pump pulse energy, and pump wavelength (775--1600 nm). Continuum generation is shown at repetition rates of up to 80 MHz and for pump pulse durations of up to 350 fs. In yttrium aluminum garnet (YAG), yttrium vanadate (YVO4), gadolinium vanadate (GdVO4), and potassium-gadolinium tungstate (KGW) thresholds below 50 nJ, plateau-like visible and infrared spectra, and higher infrared photon flux as compared to conventional materials like sapphire are found. We discuss the particular advantages of these materials for application in parametric amplification, femtosecond spectroscopy, and carrier-envelope phase stabilization.},
  day       = {21},
  doi       = {10.1007/s00340-009-3699-1},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1007/s00340-009-3699-1},
}

@Article{Braun1995,
  author    = {A. Braun and G. Korn and X. Liu and D. Du and J. Squier and G. Mourou},
  title     = {Self-channeling of high-peak-power femtosecond laser pulses in air},
  journal   = {Opt. Lett.},
  year      = {1995},
  volume    = {20},
  pages     = {73--75},
  month     = {Jan},
  abstract  = {The self-channeling of ultrashort laser pulses through 20 m of air was demonstrated. The channeled pulse was measured to have 0.75 mJ of energy, a diameter of 80 $\mu$m FWHM, and a modulated spectrum. All these values were measured to be fairly constant during the propagation of the pulse. A preliminary model is shown to explain these results.},
  doi       = {10.1364/OL.20.000073},
  keywords  = {Electric fields; Femtosecond pulses; Laser energy; Refractive index; Self phase modulation; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-20-1-73},
}

@Article{Brida2009,
  author    = {D Brida and C Manzoni and G Cirmi and M Marangoni and S Bonora and P Villoresi and S De Silvestri and G Cerullo},
  title     = {Few-optical-cycle pulses tunable from the visible to the mid-infrared by optical parametric amplifiers},
  journal   = {J. Opt.},
  year      = {2009},
  volume    = {12},
  pages     = {013001},
  month     = {nov},
  annote    = {Ultrafast optical parametric amplifiers (OPAs) can provide, under suitable conditions, ultra-broad gain bandwidths and can thus be used as effective tools for the generation of widely tunable few-optical-cycle light pulses. In this paper we review recent work on the development of ultra-broadband OPAs and experimentally demonstrate pulses with durations approaching the single-cycle limit and almost continuous tunability from the visible to the mid-IR.},
  doi       = {10.1088/2040-8978/12/1/013001},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1088%2F2040-8978%2F12%2F1%2F013001},
}

@Article{Brodeur1999,
  author    = {A. Brodeur and S. L. Chin},
  title     = {Ultrafast white-light continuum generation and self-focusing in transparent condensed media},
  journal   = {J. Opt. Soc. Am. B},
  year      = {1999},
  volume    = {16},
  pages     = {637--650},
  month     = {Apr},
  abstract  = {We report an investigation of white-light continuum generation and self-focusing by 140-fs Ti:sapphire laser pulses in extended transparent media. It is found that continuum generation is triggered by self-focusing and that both phenomena depend on the medium's bandgap. There is a bandgap threshold for continuum generation. Above that threshold the continuum's width increases with increasing bandgap. Furthermore, the beam's self-focal diameter is discontinuous across the threshold. To explain the observations a mechanism is proposed that involves multiphoton excitation of electrons into the conduction band at the self-focus; the generated free electrons cause spectral superbroadening and limit the self-focal diameter. The continuum beam's surprisingly low divergence is then investigated and explained in terms of a Kerr lensing effect.},
  doi       = {10.1364/JOSAB.16.000637},
  keywords  = {Harmonic generation and mixing ; Multiphoton processes; Self-action effects; Femtosecond phenomena; Ultrafast nonlinear optics; Ultrafast phenomena; Condensed matter; Fast Fourier transforms; Laser beams; Raman scattering; Self phase modulation; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-16-4-637},
}

@Article{Brodeur1998,
  Title                    = {Band-Gap Dependence of the Ultrafast White-Light Continuum},
  Author                   = {Brodeur, A. and Chin, S. L.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {1998},

  Month                    = {May},
  Pages                    = {4406--4409},
  Volume                   = {80},

  Doi                      = {10.1103/PhysRevLett.80.4406},
  Issue                    = {20},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.18},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.80.4406}
}

@Article{Budriunas2017,
  author    = {Budri{\={u}}nas, Rimantas and Ku{\v{c}}inskas, Dainius and Varanavi{\v{c}}ius, Ar{\={u}}nas},
  title     = {High-energy continuum generation in an array of thin plates pumped by tunable femtosecond IR pulses},
  journal   = {Appl. Phys. B},
  year      = {2017},
  volume    = {123},
  pages     = {212},
  month     = {Jul},
  issn      = {1432-0649},
  abstract  = {We report the generation of octave-spanning supercontinuum pulses in an arrangement of thin transparent plates pumped by 60В fs infrared pulses tunable from 1.2 to 1.75В {\$}{\$}{\backslash}upmu {\backslash}mathrm{\{}m{\}}{\$}{\$}$\mu$m. We demonstrate that the multiple plate technique allows scaling up the energy of the continuum to the level of hundreds of {\$}{\$}{\backslash}upmu {\backslash}mathrm{\{}J{\}}{\$}{\$}$\mu$Jwhile avoiding optical damage and beam breakup due to multiple filamentation. We investigate the spatial and temporal structures of the continuum by performing XFROG and frequency-resolved angular spectra measurements and confirm that the continuum wave packet is well-behaved in time and space and possesses an estimated spectral energy density in excess of 10В nJ/nm throughout the range, which exceeds that of continua generated in bulk solids by more than two orders of magnitude. Finally, we demonstrate for the first time that the carrier-envelope phase stability of the multi-plate continuum is comparable to that of a continuum generated in a bulk medium.},
  day       = {11},
  doi       = {10.1007/s00340-017-6785-9},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-017-6785-9},
}

@Article{Bejot2016,
  author    = {P. B\'{e}jot and F. Billard and C. Peureux and T. Diard and J. Picot-Cl\'{e}mente and C. Strutynski and P. Mathey and O. Mouawad and O. Faucher and K. Nagasaka and Y. Ohishi and F. Smektala},
  title     = {Filamentation-induced spectral broadening and pulse shortening of infrared pulses in Tellurite glass},
  journal   = {Opt. Commun.},
  year      = {2016},
  volume    = {380},
  pages     = {245--249},
  issn      = {0030-4018},
  abstract  = {Filamentation of infrared femtosecond pulses in Tellurite glass is reported, leading to the generation of a supercontinuum generation spanning from the visible up to 4Ојm. The angular distribution of the supercontinuum shows clear evidence of conical waves generation, in particular, in the visible region. Moreover, taking advantage of the spatio-temporal self-focusing effect occurring in the Tellurite glass, a twofold pulse shortening is demonstrated. Tellurite glass appears as a very convenient, versatile and promising medium for femtosecond nonlinear optics in the infrared region.},
  doi       = {https://doi.org/10.1016/j.optcom.2016.06.003},
  keywords  = {Self-focusing, Filamentation, Ultrafast processes, Infrared transmitting materials, Optical materials, Infrared glasses},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {http://www.sciencedirect.com/science/article/pii/S0030401816304990},
}

@Article{Calabrese2012,
  author    = {Carmella Calabrese and Ashley M. Stingel and Lei Shen and Poul B. Petersen},
  title     = {Ultrafast continuum mid-infrared spectroscopy: probing the entire vibrational spectrum in a single laser shot with femtosecond time resolution},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {2265--2267},
  month     = {Jun},
  abstract  = {Until now, ultrafast IR spectroscopy has been limited by the bandwidth of optical parametric amplifiers, typically 100--400вЂ‰вЂ‰cm{\textminus}1. Here we present the first example of transient IR spectroscopy using a continuum laser source to probe the entire mid-IR region with ultrafast time resolution. The continuum source is based on focusing the fundamental, second harmonic, and third harmonic of 1В mJ, 25В fs, 800В nm pulses in air, generating $\sim$150вЂ‰вЂ‰fs continuum mid-IR pulses that span the frequency range of \&lt;400 to \&gt;5000вЂ‰вЂ‰cm-1 or, conversely, \&lt;2 to \&gt;25вЂ‰вЂ‰$\mu$m. We characterize the spectral and temporal properties of dicarbonylacetonato rhodium(I) in hexane. We further demonstrate the versatility of the method by measuring the very fast and broad (\&gt;1500вЂ‰вЂ‰cm-1) spectral changes following IR excitation associated with the 7-azaindole--acetic acid heterodimer in carbon tetrachloride.},
  doi       = {10.1364/OL.37.002265},
  keywords  = {Nonlinear optics, four-wave mixing; Infrared; Ultrafast technology; Supercontinuum generation; Fused silica; Infrared spectroscopy; Laser sources; Monochromators; Optical amplifiers; Spectroscopy},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-12-2265},
}

@Article{Chekalin2015a,
  author    = {S V Chekalin and A E Dokukina and A E Dormidonov and V O Kompanets and E O Smetanina and V P Kandidov},
  title     = {Light bullets from a femtosecond filament},
  journal   = {J. Phys. B: At., Mol. Opt. Phys.},
  year      = {2015},
  volume    = {48},
  pages     = {094008},
  month     = {apr},
  annote    = {The scenario of the formation of light bullets in the presence of anomalous group velocity dispersion is presented within the same general scenario for condensed matter and humid air. The temporal and spectral parameters of light bullets during filamentation in fused silica and humid air are obtained. A light bullet (LB) is a short-lived formation in a femtosecond filament with a high spatiotemporal light field localization. The sequence formation of the quasi-periodical LB is obtained numerically and is confirmed experimentally by autocorrelation measurements of the LBвЂ™s duration. The estimation of the LB duration reaches few-cycle value. It is established that the generation of each LB is accompanied by the ejection of a supercontinuum (SC) in the visible spectrum and an isolated anti-Stokes wing is formed in the visible area of the SC as a result of destructive interference of broadband spectral components. It was found that the energy of a visible SC increases discretely according to the number of LBs in the filament. We demonstrated that the model of ionization in solid dielectric which is used in numerical simulation fundamentally affects the obtained scenario of LB formation. The possibility of the formation of LBs under the filamentation of middle-IR pulses in the atmosphere was shown with numerical simulation.},
  doi       = {10.1088/0953-4075/48/9/094008},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F0953-4075%2F48%2F9%2F094008},
}

@Article{Chekalin2015b,
  author    = {S V Chekalin and V O Kompanets and A E Dokukina and A E Dormidonov and E O Smetanina and V P Kandidov},
  title     = {Visible supercontinuum radiation of light bullets in the femtosecond filamentation of {IR} pulses in fused silica},
  journal   = {Quantum Electron.},
  year      = {2015},
  volume    = {45},
  pages     = {401--407},
  month     = {may},
  annote    = {We report experimental and theoretical investigations of visible supercontinuum generation in the formation of light bullets in a filament produced by IR pulses. In the filamentation of a 1700 вЂ“ 2200 nm pulse in fused silica, bright tracks are recorded resulting from the recombination glow of carriers in the laser plasma produced by a sequence of light bullets and from the scattering in silica of the visible supercontinuum generated by the light bullets. It is found that the formation of a light bullet is attended with an outburst of a certain portion of supercontinuum energy in the visible range. The energy outburst is the same for all bullets in the sequence and becomes smaller with increasing pulse wavelength.},
  doi       = {10.1070/qe2015v045n05abeh015773},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1070%2Fqe2015v045n05abeh015773},
}

@Article{Chekalin2017,
  author    = {S V Chekalin and V O Kompanets and A E Dormidonov and E D Zaloznaya and V P Kandidov},
  title     = {Supercontinuum spectrum upon filamentation of laser pulses under conditions of strong and weak anomalous group velocity dispersion in transparent dielectrics},
  journal   = {Quantum Electron.},
  year      = {2017},
  volume    = {47},
  pages     = {252--258},
  month     = {mar},
  annote    = {Using experiment and numerical simulation, we study the effect of anomalous group velocity dispersion (AGVD) on the formation of a visible supercontinuum band and light bullets arising in the course of filamentation of mid-IR femtosecond pulses in fused silica and fluorides. It is found that the anti-Stokes shift of the visible band increases with increasing energy of the pulse, the centre wavelength of which lies in the region of weak AGVD, and does not depend on this energy in the region of strong AGVD. A criterion is introduced for assessment of the AGVD вЂ�strengthвЂ™, at which the stable visible supercontinuum band accompanies the formation of a robust light bullet in the mid-IR filament.},
  doi       = {10.1070/qel16289},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1070%2Fqel16289},
}

@Article{Chekalin2013,
  author    = {Sergei V Chekalin and V O Kompanets and E O Smetanina and V P Kandidov},
  title     = {Light bullets and supercontinuum spectrum during femtosecond pulse filamentation under conditions of anomalous group-velocity dispersion in fused silicalica},
  journal   = {Quantum Electron.},
  year      = {2013},
  volume    = {43},
  pages     = {326--331},
  month     = {apr},
  annote    = {We report the results of theoretical and experimental research on spectrum transformation and spatiotemporal distribution of the femtosecond laser radiation intensity during filamentation in fused silica. The formation of light bullets with a high power density is first observed in a femtosecond laser pulse in the anomalous group velocity dispersion regime at a wavelength of 1800 nm. The minimum duration of the light bullet is about two oscillation cycles of the light field.},
  doi       = {10.1070/qe2013v043n04abeh015110},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1070%2Fqe2013v043n04abeh015110},
}

@Article{Cheng:12,
  Title                    = {Generation of tunable octave-spanning mid-infrared pulses by filamentation in gas media},
  Author                   = {Mark Cheng and Anthony Reynolds and Heather Widgren and Munira Khalil},
  Journal                  = {Opt. Lett.},
  Year                     = {2012},

  Month                    = {Jun},
  Pages                    = {1787--1789},
  Volume                   = {37},

  Abstract                 = {The continued development of femtosecond mid-infrared (IR) sources with ultrabroad spectral width is critical for probing and controlling complex molecular structural dynamics on an ultrafast timescale. We report on a sub-20\&\#xA0;fs, coherent mid-IR source with an octave-spanning spectral bandwidth (\&gt;2000\&\#x2009;\&\#x2009;cm\&\#x2212;1) tunable from 2\&\#x2013;8 micrometers (37.5\&\#x2013;150\&\#xA0;THz), with energy \&gt;0.4\&\#x2009;\&\#x2009;\&\#x3BC;J/pulse at 1\&\#xA0;kHz. The mid-IR pulses are generated by four-wave mixing during the filamentation of intense 800\&\#xA0;nm and 400\&\#xA0;nm pulses in various gas media. Spectral tunability is achieved by the choice of gas, pressure and input 800\&\#xA0;nm pulse energy.},
  Doi                      = {10.1364/OL.37.001787},
  Keywords                 = {Ultrafast nonlinear optics; Spectroscopy, infrared; Pulses; Ultrafast phenomena; Bandpass filters; Electric fields; Optical elements; Regenerative amplification; Sum frequency generation; Visible light},
  Owner                    = {NAG},
  Publisher                = {OSA},
  Timestamp                = {2019.02.08},
  Url                      = {http://ol.osa.org/abstract.cfm?URI=ol-37-11-1787}
}

@Article{Chessa1999,
  Title                    = {Temporal and Angular Resolution of the Ionization-Induced Refraction of a Short Laser Pulse in Helium Gas},
  Author                   = {Chessa, P. and De Wispelaere, E. and Dorchies, F. and Malka, V. and Marqu\`es, J. R. and Hamoniaux, G. and Mora, P. and Amiranoff, F.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {1999},

  Month                    = {Jan},
  Pages                    = {552--555},
  Volume                   = {82},

  Doi                      = {10.1103/PhysRevLett.82.552},
  Issue                    = {3},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.14},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.82.552}
}

@Article{Chin2001,
  Title                    = {Extreme Midinfrared Nonlinear Optics in Semiconductors},
  Author                   = {Chin, Alan H. and Calder\'on, Oscar G. and Kono, Junichiro},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2001},

  Month                    = {Apr},
  Pages                    = {3292--3295},
  Volume                   = {86},

  Doi                      = {10.1103/PhysRevLett.86.3292},
  Issue                    = {15},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.86.3292}
}

@Article{Couairon2011,
  Title                    = {Practitioner's guide to laser pulse propagation models and simulation},
  Author                   = {Couairon, A.
and Brambilla, E.
and Corti, T.
and Majus, D.
and de J. Ram{\'i}rez-G{\'o}ngora, O.
and Kolesik, M.},
  Journal                  = {The European Physical Journal Special Topics},
  Year                     = {2011},

  Month                    = {Nov},
  Pages                    = {5--76},
  Volume                   = {199},

  Abstract                 = {The purpose of this article is to provide practical introduction into numerical modeling of ultrashort optical pulses in extreme nonlinear regimes. The theoretic background section covers derivation of modern pulse propagation models starting from Maxwell's equations, and includes both envelope-based models and carrier-resolving propagation equations. We then continue with a detailed description of implementation in software of Nonlinear Envelope Equations as an example of a mixed approach which combines finite-difference and spectral techniques. Fully spectral numerical solution methods for the Unidirectional Pulse Propagation Equation are discussed next. The modeling part of this guide concludes with a brief introduction into efficient implementations of nonlinear medium responses. Finally, we include several worked-out simulation examples. These are mini-projects designed to highlight numerical and modeling issues, and to teach numerical-experiment practices. They are also meant to illustrate, first and foremost for a non-specialist, how tools discussed in this guide can be applied in practical numerical modeling.},
  Day                      = {01},
  Doi                      = {10.1140/epjst/e2011-01503-3},
  ISSN                     = {1951-6401},
  Owner                    = {NAG},
  Timestamp                = {2019.02.07},
  Url                      = {https://doi.org/10.1140/epjst/e2011-01503-3}
}

@Article{Couairon2007,
  author    = {A. Couairon and A. Mysyrowicz},
  title     = {Femtosecond filamentation in transparent media},
  journal   = {Phys. Rep.},
  year      = {2007},
  volume    = {441},
  pages     = {47--189},
  issn      = {0370-1573},
  abstract  = {This paper introduces and discusses the main aspects of ultrashort laser pulse filamentation in various transparent media such as air (gases), transparent solids and liquids. The properties of femtosecond filaments and their applications are presented. Theoretical models developed to explain filaments and the main predictions inferred from these models are reviewed. The various techniques to observe filaments and to measure their characteristics are described. The main measurements of filament features performed so far are reviewed.},
  doi       = {https://doi.org/10.1016/j.physrep.2006.12.005},
  keywords  = {Filamentation, Ultrashort laser pulses, Optical Kerr effect, Multiphoton ionization, Nonlinear propagation},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {http://www.sciencedirect.com/science/article/pii/S037015730700021X},
}

@Article{Couairon2005,
  Title                    = {Filamentation and damage in fused silica induced by tightly focused femtosecond laser pulses},
  Author                   = {Couairon, A. and Sudrie, L. and Franco, M. and Prade, B. and Mysyrowicz, A.},
  Journal                  = {Phys. Rev. B},
  Year                     = {2005},

  Month                    = {Mar},
  Pages                    = {125435},
  Volume                   = {71},

  Doi                      = {10.1103/PhysRevB.71.125435},
  Issue                    = {12},
  Numpages                 = {11},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevB.71.125435}
}

@Article{Darginavicius2012b,
  author    = {Julius Darginavi\v{c}ius and Nail Garejev and Audrius Dubietis},
  title     = {Generation of carrier-envelope phase-stable two optical-cycle pulses at 2~\si{\micro\metre} from a noncollinear beta-barium borate optical parametric amplifier},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {4805--4807},
  month     = {Nov},
  abstract  = {We report on the generation of two optical-cycle, carrier-envelope phase-stable pulses with energy of 15\&\#xA0;\&\#x3BC;J at central wavelength of 2\&\#xA0;\&\#x3BC;m. Pulses of 15\&\#xA0;fs (2.3 optical cycles) duration are obtained by difference-frequency generation, which at the same time provides passive carrier-envelope phase stabilization, and noncollinear optical parametric amplification in beta-barium borate crystal, which is shown to provide broad phase-matching bandwidth if seeded by pulses in the 1.6\&\#x2013;2.6\&\#xA0;\&\#x3BC;m wavelength range. Pulse compression is achieved by means of a simple propagation through the optical setup and by precisely controlling the initial chirp of the pulses to be frequency downconverted.},
  doi       = {10.1364/OL.37.004805},
  keywords  = {Phase measurement; Parametric oscillators and amplifiers; Pulse compression; Ultrafast nonlinear optics; Laser beams; Nonlinear optics; Optical amplifiers; Parametric processes; Phase matching; Strong field physics},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-22-4805},
}

@Article{Darginavicius2013,
  author    = {Julius Darginavi\v{c}ius and Donatas Majus and Vytautas Jukna and Nail Garejev and Gintaras Valiulis and Arnaud Couairon and Audrius Dubietis},
  title     = {Ultrabroadband supercontinuum and third-harmonic generation in bulk solids with two optical-cycle carrier-envelope phase-stable pulses at 2~\si{\micro\metre}},
  journal   = {Opt. Express},
  year      = {2013},
  volume    = {21},
  pages     = {25210--25220},
  month     = {Oct},
  abstract  = {We report on the generation of ultrabroadband supercontinuum (SC) by filamentation of two optical-cycle, carrier-envelope phase-stable pulses at 2 $\mu$m in fused silica, sapphire, CaF2 and YAG. The SC spectra extend from 450 nm to more than 2500 nm, and their particular shapes depend on dispersive properties of the materials. Prior to spectral super-broadening, we observe third-harmonic generation, which occurs in the condition of large phase and group velocity mismatch and consists of free and driven components. A double-peaked third-harmonic structure coexists with the SC pulse as demonstrated by the numerical simulations and verified experimentally. The SC pulses have stable carrier envelope phase with short-term rms fluctuations of $\sim$ 300 mrad, as simultaneously measured in YAG crystal by f-2f and f-3f interferometry, where the latter makes use of intrinsic third-harmonic generation.},
  doi       = {10.1364/OE.21.025210},
  keywords  = {Harmonic generation and mixing ; Kerr effect; Self-action effects; Ultrafast nonlinear optics; Supercontinuum generation; Electric fields; Fused silica; Numerical simulation; Phase matching; Phase velocity; Self phase modulation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-21-25210},
}

@Article{Dharmadhikari2005,
  author    = {Dharmadhikari, A.K. and Rajgara, F.A. and Mathur, D.},
  title     = {Systematic study of highly efficient white light generation in transparent materials using intense femtosecond laser pulses},
  journal   = {Appl. Phys. B},
  year      = {2005},
  volume    = {80},
  pages     = {61--66},
  month     = {Jan},
  issn      = {1432-0649},
  abstract  = {We report the results of a systematic study of white light generation in different high band-gap optical media (BaF2, acrylic, water and BK-7 glass) using ultrashort (45В fs) laser pulses. We have investigated the influence of different parameters, such as focal position of the incident laser light within the medium, the polarization state of the incident laser radiation and the pulse duration of the incident laser beam on the white light generation. Our results indicate that for intense, ultrashort pulses, the position of physical focus inside the media is crucial in the generation, with high efficiency, of white light spectra over the wavelength range 400--1100В nm. Linearly polarized incident laser light generates white light with higher intensity in the blue region than circularly polarized light. Ultrashort (45В fs) pulses generate a flatter spectrum with higher white light conversion efficiency than longer (300В fs) pulses of the same laser power. We believe that a flat response over a wide range of wavelengths in the continuum may be efficiently compressed for generation of sub-10В fs pulses. },
  day       = {01},
  doi       = {10.1007/s00340-004-1682-4},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-004-1682-4},
}

@Article{Dharmadhikari2009,
  author    = {Dharmadhikari, A. K. and Dharmadhikari, J. A. and Mathur, D.},
  title     = {Visualization of focusing--refocusing cycles during filamentation in {BaF}$_2$},
  journal   = {Appl. Phys. B},
  year      = {2008},
  volume    = {94},
  pages     = {259},
  month     = {Dec},
  issn      = {1432-0649},
  abstract  = {Filamentation occurs within a 1.5 cm-long crystal of BaF2 during the propagation of intense, ultrashort (40В fs) pulses of 800 nm light; a systematic study as a function of incident power enables us to extract quantitative information on laser intensity within the condensed medium, the electron density and the six-photon absorption cross section. At low incident power, a single filament is formed within the crystal; two or more filaments are observed along the direction transverse to laser propagation at higher incident powers. Further, due to fluorescence from six-photon absorption (6PA), we are able to map the intensity variation in the focusing--refocusing cycles along the direction of laser propagation. At still higher incident powers, we observe splitting of multiple filaments. By measuring the radius (Lmin{\thinspace}) of single filament inside BaF2, we obtain estimates of peak intensities (Imax{\thinspace}) and electron densities ($\rho$max{\thinspace}) to be 3.26{\texttimes}1013В W{\thinspace}cmв€’2 and 2.81{\texttimes}1019 cmв€’3, respectively. Use of these values enables us to deduce that the 6PA cross-section in BaF2 is 0.33{\texttimes}10в€’70 cm12{\thinspace}Wв€’6{\thinspace}sв€’1.},
  day       = {10},
  doi       = {10.1007/s00340-008-3317-7},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-008-3317-7},
}

@Article{Dharmadhikari2014,
  author    = {Dharmadhikari, Jayashree A. and Deshpande, Rucha A. and Nath, Arpita and Dota, Krithika and Mathur, Deepak and Dharmadhikari, Aditya K.},
  title     = {Effect of group velocity dispersion on supercontinuum generation and filamentation in transparent solids},
  journal   = {Appl. Phys. B},
  year      = {2014},
  volume    = {117},
  pages     = {471--479},
  month     = {Oct},
  issn      = {1432-0649},
  abstract  = {We experimentally investigate the spectral extent and spectral profile of the supercontinuum (SC) generated in transparent solids: barium fluoride, calcium fluoride, and fused silica upon irradiation by intense femtosecond-long pulses of 800, 1,380, and 2,200В nm light. These wavelengths correspond to the normal and anomalous group velocity dispersion (GVD) regimes in fused silica calcium fluoride and barium fluoride. We observe an isolated (anti-Stokes) wing on the blue side most prominently in fused silica but also in CaF2. The SC conversion efficiency is measured for the long wavelengths used in our experiments. We also present results on filamentation in BaF2 in the anomalous GVD regime, including visualization of focusing--refocusing events within the crystal; the size of a single filament is also determined. The 15-photon absorption cross section in BaF2 is deduced to be 6.5В {\texttimes}В 10в€’190В cm30В Wв€’15В sв€’1.},
  day       = {01},
  doi       = {10.1007/s00340-014-5857-3},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-014-5857-3},
}

@Article{DiChiara2009,
  author    = {Anthony D. DiChiara and Emily Sistrunk and Terry A. Miller and Pierre Agostini and Louis F. DiMauro},
  title     = {An investigation of harmonic generation in liquid media with a mid-infrared laser},
  journal   = {Opt. Express},
  year      = {2009},
  volume    = {17},
  pages     = {20959--20965},
  month     = {Nov},
  abstract  = {Abstract: We present a harmonic generation experiment using liquid H2O and D2O interrogated by a mid-infrared, 3.66 $\mu$m, laser at a maximum intensity of 8x1013 W/cm2. The unique aspects of the experiment include the long wavelength and short (9 cycle-110 fs) pulse duration of the laser as well as the near-resonant excitation of the H2O and D2O vibrational modes. We observe up to the 13th harmonic order in H2O and intensity scaling is consistent with a direct perturbative process up to the 9th harmonic order. Phase matching and resonant absorption are unable to account for the observed differences in harmonic yields between samples.},
  doi       = {10.1364/OE.17.020959},
  keywords  = {Harmonic generation and mixing ; Strong field laser physics; Harmonic generation; Laser sources; Phase matching; Power spectral density; Ultrafast lasers; Visible lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-17-23-20959},
}

@Article{Dormidonov2015,
  author    = {A.E. Dormidonov and V.O. Kompanets and S.V. Chekalin and V.P. Kandidov},
  title     = {Giantically blue-shifted visible light in femtosecond mid-{IR} filament in fluorides},
  journal   = {Opt. Express},
  year      = {2015},
  volume    = {23},
  pages     = {29202--29210},
  month     = {Nov},
  abstract  = {A giant blue shift (more than 3000 nm) of an isolated visible band of supercontinuum was discovered and studied in the single filament regime of Mid-IR femtosecond laser pulse at powers slightly exceeding critical power for self-focusing in fluorides. At the pulse central wavelength increasing from 3000 nm to 3800 nm the spectral maximum of the visible band is shifted from 570 nm and 520 nm up to 400 nm and 330 nm for BaF2 and CaF2, respectively, its spectral width (FWHM) being reduced from 50 \&\#x2013; 70 nm to 14 nm. It is shown that the formation of this narrow visible wing is a result of the interference of the supercontinuum components in the anomalous group velocity dispersion regime.},
  doi       = {10.1364/OE.23.029202},
  keywords  = {Kerr effect; Optical nonlinearities of condensed matter; Self-action effects; Constructive interference; Destructive interference; Femtosecond pulses; Fused silica; Infrared radiation; Visible light},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-23-22-29202},
}

@Article{Doussot2016,
  Title                    = {Impact of third-harmonic generation on the filamentation process},
  Author                   = {Doussot, J. and B\'ejot, P. and Faucher, O.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2016},

  Month                    = {Mar},
  Pages                    = {033857},
  Volume                   = {93},

  Doi                      = {10.1103/PhysRevA.93.033857},
  Issue                    = {3},
  Numpages                 = {6},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.14},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.93.033857}
}

@Article{Dubietis2017,
  author    = {A. Dubietis and G. Tamo\v{s}auskas and R. \v{S}uminas and V.Jukna and A. Couairon},
  title     = {Ultrafast supercontinuum generation in bulk condensed media},
  journal   = {Lith. J. Phys.},
  year      = {2017},
  volume    = {57},
  pages     = {133--157},
  owner     = {NAG},
  timestamp = {2019.02.18},
}

@Article{Dudley2006,
  Title                    = {Supercontinuum generation in photonic crystal fiber},
  Author                   = {Dudley, John M. and Genty, Go\"ery and Coen, St\'ephane},
  Journal                  = {Rev. Mod. Phys.},
  Year                     = {2006},

  Month                    = {Oct},
  Pages                    = {1135--1184},
  Volume                   = {78},

  Doi                      = {10.1103/RevModPhys.78.1135},
  Issue                    = {4},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/RevModPhys.78.1135}
}

@Article{Durand2013a,
  author    = {Durand, M. and Jarnac, A. and Houard, A. and Liu, Y. and Grabielle, S. and Forget, N. and Dur\'ecu, A. and Couairon, A. and Mysyrowicz, A.},
  title     = {Self-Guided Propagation of Ultrashort Laser Pulses in the Anomalous Dispersion Region of Transparent Solids: A New Regime of Filamentation},
  journal   = {Phys. Rev. Lett.},
  year      = {2013},
  volume    = {110},
  pages     = {115003},
  month     = {Mar},
  doi       = {10.1103/PhysRevLett.110.115003},
  issue     = {11},
  numpages  = {4},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.110.115003},
}

@Article{Durand2013b,
  author    = {Durand, Magali and Lim, Khan and Jukna, Vytautas and McKee, Erik and Baudelet, Matthieu and Houard, Aur\'elien and Richardson, Martin and Mysyrowicz, Andr\'e and Couairon, Arnaud},
  title     = {Blueshifted continuum peaks from filamentation in the anomalous dispersion regime},
  journal   = {Phys. Rev. A},
  year      = {2013},
  volume    = {87},
  pages     = {043820},
  month     = {Apr},
  doi       = {10.1103/PhysRevA.87.043820},
  issue     = {4},
  numpages  = {5},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.87.043820},
}

@Article{Faccio2006b,
  author    = {Faccio, Daniele and Averchi, Alessandro and Couairon, Arnaud and Dubietis, Audrius and Piskarskas, Rimtautas and Matijosius, Aidas and Bragheri, Francesca and Porras, Miguel A. and Piskarskas, Algis and Di Trapani, Paolo},
  title     = {Competition between phase-matching and stationarity in {K}err-driven optical pulse filamentation},
  journal   = {Phys. Rev. E},
  year      = {2006},
  volume    = {74},
  pages     = {047603},
  month     = {Oct},
  doi       = {10.1103/PhysRevE.74.047603},
  issue     = {4},
  numpages  = {4},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevE.74.047603},
}

@Article{Faccio2008,
  author    = {Faccio, D. and Averchi, A. and Lotti, A. and Kolesik, M. and Moloney, J. V. and Couairon, A. and Di Trapani, P.},
  title     = {Generation and control of extreme blueshifted continuum peaks in optical {K}err media},
  journal   = {Phys. Rev. A},
  year      = {2008},
  volume    = {78},
  pages     = {033825},
  month     = {Sep},
  doi       = {10.1103/PhysRevA.78.033825},
  issue     = {3},
  numpages  = {6},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.78.033825},
}

@Article{Faccio2006a,
  author    = {Faccio, Daniele and Porras, Miguel A. and Dubietis, Audrius and Bragheri, Francesca and Couairon, Arnaud and Di Trapani, Paolo},
  title     = {Conical Emission, Pulse Splitting, and {X}-Wave Parametric Amplification in Nonlinear Dynamics of Ultrashort Light Pulses},
  journal   = {Phys. Rev. Lett.},
  year      = {2006},
  volume    = {96},
  pages     = {193901},
  month     = {May},
  doi       = {10.1103/PhysRevLett.96.193901},
  issue     = {19},
  numpages  = {4},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.96.193901},
}

@Article{Fazio2009,
  author    = {Eugenio Fazio and Federico Pettazzi and Marco Centini and Mathieu Chauvet and Alessandro Belardini and Massimo Alonzo and Concita Sibilia and Mario Bertolotti and Michael Scalora},
  title     = {Complete spatial and temporal locking in phase-mismatched second-harmonic generation},
  journal   = {Opt. Express},
  year      = {2009},
  volume    = {17},
  pages     = {3141--3147},
  month     = {Mar},
  abstract  = {We experimentally demonstrate simultaneous phase and group velocity locking of fundamental and generated second harmonic pulses in Lithium Niobate, under conditions of material phase mismatch. In phase-mismatched, pulsed second harmonic generation in addition to a reflected signal two forward-propagating pulses are also generated at the interface between a linear and a second order nonlinear material: the first pulse results from the solution of the homogeneous wave equation, and propagates at the group velocity expected from material dispersion; the second pulse is the solution of the inhomogeneous wave equation, is phase-locked and trapped by the pump pulse, and follows the pump trajectory. At normal incidence, the normal and phase locked pulses simply trail each other. At oblique incidence, the consequences can be quite dramatic. The homogeneous pulse refracts as predicted by material dispersion and Snell's law, yielding at least two spatially separate second harmonic spots at the medium's exit. We thus report the first experimental results showing that, at oblique incidence, fundamental and phase-locked second harmonic pulses travel with the same group velocity and follow the same trajectory. This is direct evidence that, at least up to first order, the effective dispersion of the phase-locked pulse is similar to the dispersion of the pump pulse.},
  doi       = {10.1364/OE.17.003141},
  keywords  = {Nonlinear optics; Harmonic generation and mixing ; Nonlinear optics at surfaces; Pulse propagation and temporal solitons ; Ultrafast nonlinear optics; Harmonic generation; Nonlinear optics; Parametric processes; Phase matching; Refractive index; Second harmonic generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-17-5-3141},
}

@Article{Fibich1997,
  author    = {G. Fibich and G. C. Papanicolaou},
  title     = {Self-focusing in the presence of small time dispersion and nonparaxiality},
  journal   = {Opt. Lett.},
  year      = {1997},
  volume    = {22},
  pages     = {1379--1381},
  month     = {Sep},
  abstract  = {We analyze the combined effect of small time dispersion and nonparaxiality on self-focusing and its ability to arrest the blowup of laser pulses by deriving reduced equations that depend on only the propagation distance and time. We calculate the pulse duration for which time dispersion dominates over nonparaxiality, or vice versa. We identify additional terms (shock term, group-velocity nonparaxiality, etc.)вЂ‰вЂ‰that should be retained when time dispersion and nonparaxiality are of comparable magnitude. These additional terms lead to temporal asymmetry, and in the visible spectrum they can dominate over both time dispersion and nonparaxiality.},
  doi       = {10.1364/OL.22.001379},
  keywords  = {Dispersion; Electric fields; Laser beams; Optical materials; Refractive index; Visible light},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-22-18-1379},
}

@Article{Fork1983,
  author    = {R. L. Fork and C. V. Shank and C. Hirlimann and R. Yen and W. J. Tomlinson},
  title     = {Femtosecond white-light continuum pulses},
  journal   = {Opt. Lett.},
  year      = {1983},
  volume    = {8},
  pages     = {1--3},
  month     = {Jan},
  abstract  = {We obtain gigawatt white-light continuum pulses that permit spectroscopic measurements with a time resolution of 80 fsec. These pulses extend continuously from 0.19 to 1.6 $\mu$m and have time sweeps as small as 10 fsec/1000 {\AA}. We find temporal, spatial, and spectral properties that are consistent with self-phase modulation having a prominent role in generation of the continuum.},
  doi       = {10.1364/OL.8.000001},
  keywords  = {Bandpass filters; Dispersion; Potassium dihydrogen phosphate; Self phase modulation; Spectral properties; White light},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-8-1-1},
}

@Article{Frolov2016,
  author    = {Frolov, S. A. and Trunov, V. I. and Leshchenko, V. E. and Pestryakov, E. V.},
  title     = {Multi-octave supercontinuum generation with IR radiation filamentation in transparent solid-state media},
  journal   = {Appl. Phys. B},
  year      = {2016},
  volume    = {122},
  pages     = {124},
  month     = {Apr},
  issn      = {1432-0649},
  abstract  = {Supercontinuum generation from the near to far IR during radiation filamentation in solid-state media in an anomalous dispersion region is theoretically investigated. The initial search for appropriate media with the use of an interference model showed that the widest IR spectrum is generated in media with high values of zero group velocity dispersion wavelength with the pump wavelength located not far from it. Halides belong to one of such media groups. The possibility of generation of a very wide supercontinuum in calcium fluoride (0.52--3.35В $\mu$m, which corresponds to 2.7 octaves), sodium chloride (0.7--7.6В $\mu$m, 3.5 octaves), and potassium iodide (0.66--22В $\mu$m, 5.1 octaves) is demonstrated by numerical simulation. Also, pulse self-compression down to 13В fs at the 5-$\mu$m central wavelength (about single period) has been observed in potassium iodide. The mechanisms of multi-octave supercontinuum generation are discussed.},
  day       = {27},
  doi       = {10.1007/s00340-016-6398-8},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-016-6398-8},
}

@Article{Gaarde2009,
  Title                    = {Intensity Spikes in Laser Filamentation: Diagnostics and Application},
  Author                   = {Gaarde, Mette B. and Couairon, Arnaud},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2009},

  Month                    = {Jul},
  Pages                    = {043901},
  Volume                   = {103},

  Doi                      = {10.1103/PhysRevLett.103.043901},
  Issue                    = {4},
  Numpages                 = {4},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.103.043901}
}

@Article{Gaeta2000,
  Title                    = {Catastrophic Collapse of Ultrashort Pulses},
  Author                   = {Gaeta, Alexander L.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2000},

  Month                    = {Apr},
  Pages                    = {3582--3585},
  Volume                   = {84},

  Doi                      = {10.1103/PhysRevLett.84.3582},
  Issue                    = {16},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.18},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.84.3582}
}

@Article{Galinis2015,
  Title                    = {Filamentation and supercontinuum generation in solid-state dielectric media with picosecond laser pulses},
  Author                   = {Galinis, J. and Tamo\ifmmode \check{s}\else \v{s}\fi{}auskas, G. and Gra\ifmmode \check{z}\else \v{z}\fi{}ulevi\ifmmode \check{c}\else \v{c}\fi{}i\ifmmode \bar{u}\else \={u}\fi{}t\ifmmode \dot{e}\else \.{e}\fi{}, I. and Keblyt\ifmmode \dot{e}\else \.{e}\fi{}, E. and Jukna, V. and Dubietis, A.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2015},

  Month                    = {Sep},
  Pages                    = {033857},
  Volume                   = {92},

  Doi                      = {10.1103/PhysRevA.92.033857},
  Issue                    = {3},
  Numpages                 = {5},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.14},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.92.033857}
}

@Article{Garejev2014,
  Title                    = {Third- and fifth-harmonic generation in transparent solids with few-optical-cycle midinfrared pulses},
  Author                   = {Garejev, N. and Gra\ifmmode \check{z}\else \v{z}\fi{}ulevi\ifmmode \check{c}\else \v{c}\fi{}i\ifmmode \bar{u}\else \={u}\fi{}t\ifmmode \dot{e}\else \.{e}\fi{}, I. and Majus, D. and Tamo\ifmmode \check{s}\else \v{s}\fi{}auskas, G. and Jukna, V. and Couairon, A. and Dubietis, A.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2014},

  Month                    = {Mar},
  Pages                    = {033846},
  Volume                   = {89},

  Doi                      = {10.1103/PhysRevA.89.033846},
  Issue                    = {3},
  Numpages                 = {7},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.14},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.89.033846}
}

@Article{Garejev2016,
  author    = {N. Garejev and V. Jukna and G. Tamo\v{s}auskas and M. Veli\v{c}k\.{e} and R. \v{S}uminas and A. Couairon and A. Dubietis},
  title     = {Odd harmonics-enhanced supercontinuum in bulk solid-state dielectric medium},
  journal   = {Opt. Express},
  year      = {2016},
  volume    = {24},
  pages     = {17060--17068},
  month     = {Jul},
  abstract  = {We report on generation of ultrabroadband, more than 4 octave spanning supercontinuum in thin CaF2 crystal, as pumped by intense mid-infrared laser pulses with central wavelength of 2.4 \&\#x003BC;m. The supercontinuum spectrum covers wavelength range from the ultraviolet to the mid-infrared and its short wavelength side is strongly enhanced by cascaded generation of third, fifth and seventh harmonics. Our results capture the transition from Kerr-dominated to plasma-dominated filamentation regime and uncover that in the latter the spectral superbroadening originates from dramatic plasma-induced compression of the driving pulse, which in turn induces broadening of the harmonics spectra due to cross-phase modulation effects. The experimental measurements are backed up by the numerical simulations based on a nonparaxial unidirectional propagation equation for the electric field of the pulse, which accounts for the cubic nonlinearity-induced effects, and which reproduce the experimental data in great detail.},
  doi       = {10.1364/OE.24.017060},
  keywords  = {Harmonic generation and mixing ; Nonlinear optics, four-wave mixing; Self-action effects; Ultrafast nonlinear optics; Supercontinuum generation; Cross phase modulation; Four wave mixing; Nonlinear susceptibility; Optical amplifiers; Self phase modulation; Supercontinuum generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-24-15-17060},
}

@Article{Garejev2017,
  author    = {Nail Garejev and Gintaras Tamo\v{s}auskas and Audrius Dubietis},
  title     = {Comparative study of multioctave supercontinuum generation in fused silica, {YAG}, and {LiF} in the range of anomalous group velocity dispersion},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2017},
  volume    = {34},
  pages     = {88--94},
  month     = {Jan},
  abstract  = {We present spectral measurements that uncover the detailed dynamics of the supercontinuum generation in fused silica, YAG, and LiF crystals when pumped with 100В fs pulses with a central wavelength of 2.3В $\mu$m, which falls into the range of anomalous group velocity dispersion of the media. The multi-octave supercontinuum spectra, which span from the ultraviolet to the mid-infrared, are recorded by means of high-dynamic range measurements over the entire wavelength range covered by the supercontinuum radiation. The spectral dynamics versus the input pulse energy uncovers different mechanisms of spectral broadening, which are characterized by the occurrence of specific but well-distinguished spectral signatures and which are interpreted in terms of plasma-induced and anomalous group velocity dispersion-induced compression of the driving pulse.},
  doi       = {10.1364/JOSAB.34.000088},
  keywords  = {Self-action effects; Ultrafast nonlinear optics; Supercontinuum generation; Four wave mixing; Fused silica; Nonlinear optical crystals; Optical amplifiers; Pulse compression; Self phase modulation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-34-1-88},
}

@Article{Ghimire2010,
  author    = {Ghimire, Shambhu and DiChiara, Anthony D. and Sistrunk, Emily and Agostini, Pierre and DiMauro, Louis F. and Reis, David A.},
  title     = {Observation of high-order harmonic generation in a bulk crystal},
  journal   = {Nat. Phys.},
  year      = {2010},
  volume    = {7},
  pages     = {138--141},
  month     = dec,
  owner     = {NAG},
  publisher = {Nature Publishing Group},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1038/nphys1847},
}

@Article{Grazuleviciute2016,
  author    = {I Gra{\v{z}}ulevi{\v{c}}i{\={u}}t{\.{e}} and N Garejev and D Majus and V Jukna and G Tamo{\v{s}}auskas and A Dubietis},
  title     = {Filamentation and light bullet formation dynamics in solid-state dielectric media with weak, moderate and strong anomalous group velocity dispersion},
  journal   = {J. Opt.},
  year      = {2015},
  volume    = {18},
  pages     = {025502},
  month     = {dec},
  annote    = {We present a series of measurements, which characterize filamentation dynamics of intense ultrashort laser pulses in the spaceвЂ“time domain, as captured by means of three-dimensional imaging technique in sapphire and fused silica, in the wavelength range of 1.45вЂ“2.25В Ојm, accessing the regimes of weak, moderate and strong anomalous group velocity dispersion (GVD). In the regime of weak anomalous GVD (at 1.45 Ојm), pulse splitting into two sub-pulses producing a pair of light bullets with spectrally shifted carrier frequencies in both nonlinear media is observed. In contrast, in the regimes of moderate (at 1.8 Ојm) and strong (at 2.25 Ојm) anomalous GVD we observe notably different transient dynamics, which however lead to the formation of a single self-compressed quasistationary light bullet with an universal spatiotemporal shape comprised of an extended ring-shaped periphery and a localized intense core that carries the self-compressed pulse.},
  doi       = {10.1088/2040-8978/18/2/025502},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F2040-8978%2F18%2F2%2F025502},
}

@Article{Grazuleviciute2015,
  author    = {I. Gra\v{z}ulevi\v{c}i\={u}t\.{e} and R. \v{S}uminas and G. Tamo\v{s}auskas and A. Couairon and A. Dubietis},
  title     = {Carrier-envelope phase-stable spatiotemporal light bullets},
  journal   = {Opt. Lett.},
  year      = {2015},
  volume    = {40},
  pages     = {3719--3722},
  month     = {Aug},
  abstract  = {We present an extensive experimental investigation of the self-focusing and filamentation of intense 90\&\#xA0;fs, 1.8\&\#xA0;\&\#x3BC;m, carrier-envelope phase-stable laser pulses in fused silica in the anomalous group velocity dispersion region. Spectral measurements in a wedge-shaped sample uncover dynamics of spectral broadening, which captures the evolution of third-harmonic, resonant radiation, and supercontinuum spectra as a function of the propagation distance with unprecedented detail. The relevant events of spectral broadening are linked to the formation and propagation dynamics of spatiotemporal light bullets as measured by a three-dimensional imaging technique. We also show that at a higher input power, the light bullet splits into two bullets, which retain characteristic O-shaped spatiotemporal intensity distributions and propagate with different group velocities. Finally, we demonstrate that the light bullets have a stable carrier-envelope phase that is preserved even after the bullet splitting event, as verified by f-2f interferometric measurements.},
  doi       = {10.1364/OL.40.003719},
  keywords  = {Harmonic generation and mixing ; Pulse propagation and temporal solitons ; Pulse compression; Ultrafast phenomena; Supercontinuum generation; Cross phase modulation; Fused silica; Light matter interactions; Nonlinear optics; Optical amplifiers; Sum frequency generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-40-16-3719},
}

@Article{Guizard1995,
  author    = {S Guizard and P Martin and Ph Daguzan and G Petite and P Audebert and J. P Geindre and A. Dos Santos and A Antonnetti},
  title     = {Contrasted Behaviour of an Electron Gas in {MgO}, Al2O3and {SiO}2},
  journal   = {Europhys. Lett.},
  year      = {1995},
  volume    = {29},
  pages     = {401--406},
  month     = {feb},
  annote    = {We report on the observation, by use of a sub-picosecond time-resolved phase-sensitive technique, of an electron gas pumped by an intense femtosecond laser pulse into the conduction band of three different wide-band-gap oxides. The free-carriers lifetime is measured to be two orders of magnitude longer in MgO and in Al2O3 than in SiO2.},
  doi       = {10.1209/0295-5075/29/5/009},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1209%2F0295-5075%2F29%2F5%2F009},
}

@Article{Hagemann2013,
  author    = {Franz Hagemann and Oliver Gause and Ludger W\"{o}ste and Torsten Siebert},
  title     = {Supercontinuum pulse shaping in the few-cycle regime},
  journal   = {Opt. Express},
  year      = {2013},
  volume    = {21},
  pages     = {5536--5549},
  month     = {Mar},
  abstract  = {The synthesis of nearly arbitrary supercontinuum pulse forms is demonstrated with sub-pulse structures that maintain a temporal resolution in the few-cycle regime. Spectral broadening of the 35 fs input pulses to supercontinuum bandwidths is attained in a controlled two-stage sequential filamentation in air at atmospheric pressure, facilitating a homogeneous power density over the full spectral envelope in the visible to near infrared spectral range. Only standard optics and a liquid crystal spatial light modulator (LC-SLM) are employed for achieving pulse compression to the sub 5 fs regime with pulse energies of up to 60 $\mu$J and a peak power of 12 GW. This constitutes the starting point for further pulse form synthesis via phase modulation within the sampling limit of the pulse shaper. Transient grating frequency-resolved optical gating (TG-FROG) allows for the characterization of pulse forms that extend over several hundred femtoseconds with few-cycle substructures.},
  doi       = {10.1364/OE.21.005536},
  keywords  = {Liquid-crystal devices; Pulse compression; Pulse shaping; Supercontinuum generation; Hollow core fibers; Liquid crystal modulators; Phase modulation; Pulse compression; Single mode fibers; Spatial light modulators},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-5-5536},
}

@Article{Hemmer2013,
  author    = {Micha\"{e}l Hemmer and Matthias Baudisch and Alexandre Thai and Arnaud Couairon and Jens Biegert},
  title     = {Self-compression to sub-3-cycle duration of mid-infrared optical pulses in dielectrics},
  journal   = {Opt. Express},
  year      = {2013},
  volume    = {21},
  pages     = {28095--28102},
  month     = {Nov},
  abstract  = {We present the first demonstration of sub-3 cycle optical pulses at 3.1 $\mu$m central wavelength generated through self-compression in the anomalous dispersion regime in a dielectric. The pulses emerging from this compact and efficient self-compression setup could be focused to intensities exceeding 1014 W/cm2, a suitable range for high field physics experiments. Numerical simulations performed with a 3D nonlinear propagation code, provide theoretical insight on the processes involved and support our experimental findings.},
  doi       = {10.1364/OE.21.028095},
  keywords  = {Self-action effects; Ultrafast nonlinear optics; Supercontinuum generation; Dispersion; Electric fields; Pulse compression; Pulse propagation; Self phase modulation; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-23-28095},
}

@Article{Houard2016,
  author    = {A. Houard and V. Jukna and G. Point and Y-B. Andr\'{e} and S. Klingebiel and M. Schultze and K. Michel and T. Metzger and A. Mysyrowicz},
  title     = {Study of filamentation with a high power high repetition rate ps laser at 1.03 \&\#x00B5;m},
  journal   = {Opt. Express},
  year      = {2016},
  volume    = {24},
  pages     = {7437--7448},
  month     = {Apr},
  abstract  = {We study the propagation of intense, high repetition rate laser pulses of picosecond duration at 1.03 \&\#x00B5;m central wavelength through air. Evidence of filamentation is obtained from measurements of the beam profile as a function of distance, from photoemission imaging and from spatially resolved sonometric recordings. Good agreement is found with numerical simulations. Simulations reveal an important self shortening of the pulse duration, suggesting that laser pulses with few optical cycles could be obtained via double filamentation. An important lowering of the voltage required to induce guided electric discharges between charged electrodes is measured at high laser pulse repetition rate.},
  doi       = {10.1364/OE.24.007437},
  keywords  = {Ultrafast lasers; Self-action effects; Femtosecond phenomena; Diode pumped lasers; High power lasers; Infrared lasers; Laser beams; Laser sources; Laser systems},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-24-7-7437},
}

@Article{Jarnac2014,
  author    = {Jarnac, Am\'elie and Tamosauskas, Gintaras and Majus, Donatas and Houard, Aur\'elien and Mysyrowicz, Andr\'e and Couairon, Arnaud and Dubietis, Audrius},
  title     = {Whole life cycle of femtosecond ultraviolet filaments in water},
  journal   = {Phys. Rev. A},
  year      = {2014},
  volume    = {89},
  pages     = {033809},
  month     = {Mar},
  doi       = {10.1103/PhysRevA.89.033809},
  issue     = {3},
  numpages  = {10},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.18},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.89.033809},
}

@Article{Jiang2015,
  author    = {Jiaming Jiang and Yue Zhong and Yinghui Zheng and Zhinan Zeng and Xiaochun Ge and Ruxin Li},
  title     = {Broadening of white-light continuum by filamentation in {BK7} glass at its zero-dispersion point},
  journal   = {Phys. Lett. A},
  year      = {2015},
  volume    = {379},
  pages     = {1929--1933},
  issn      = {0375-9601},
  abstract  = {Broadening of white-light continuum is observed by filamentation of near-infrared femtosecond laser pulses with peak power exceeding the megawatt level in BK7 glass with the presence of the zero-dispersion point. The simulated results show that, due to the low dispersion at the zero-dispersion point, the broadening of white-light continuum can be wider and the filament can persist in propagating stably longer distance.},
  doi       = {https://doi.org/10.1016/j.physleta.2015.04.020},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {http://www.sciencedirect.com/science/article/pii/S037596011500362X},
}

@Article{Jukna2014,
  author    = {Jukna, V. and Galinis, J. and Tamosauskas, G. and Majus, D. and Dubietis, A.},
  title     = {Infrared extension of femtosecond supercontinuum generated by filamentation in solid-state media},
  journal   = {Appl. Phys. B},
  year      = {2014},
  volume    = {116},
  pages     = {477--483},
  month     = {Aug},
  issn      = {1432-0649},
  abstract  = {We carried out experimental and numerical study of the ultrafast supercontinuum generation by filamentation of 120В fs, 800В nm laser pulses in sapphire under variable focusing conditions. We demonstrate that the supercontinuum spectra produced in loose focusing conditions have much larger infrared extent, while the spectral blueshift remains fairly the same. Our numerical simulations reproduce the experimental results in great detail and disclose that the input beam focusing conditions affect only the nonlinear propagation of the leading sub-pulse, which emerges after the pulse splitting event, and which is responsible for the redshifted spectral broadening.},
  day       = {01},
  doi       = {10.1007/s00340-013-5723-8},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-013-5723-8},
}

@Article{Kartashov2013,
  author    = {D. Kartashov and S. Ali\v{s}auskas and A. Pug\v{z}lys and A. Voronin and A. Zheltikov and M. Petrarca and P. B\'{e}jot and J. Kasparian and J.-P. Wolf and A. Baltu\v{s}ka},
  title     = {Mid-infrared laser filamentation in molecular gases},
  journal   = {Opt. Lett.},
  year      = {2013},
  volume    = {38},
  pages     = {3194--3197},
  month     = {Aug},
  abstract  = {We observed the filamentation of mid-infrared ultrashort laser pulses (3.9\&\#xA0;\&\#x3BC;m, 80\&\#xA0;fs) in molecular gases. It efficiently generates a broadband supercontinuum over two octaves in the 2.5\&\#x2013;6\&\#xA0;\&\#x3BC;m spectral range, with a red-shift up to 500\&\#xA0;nm due to the Raman effect, which dominates over the blue shift induced by self-steepening and the gas ionization. As a result, the conversion efficiency into the Stokes region (4.3\&\#x2013;6\&\#xA0;\&\#x3BC;m) 65\% is demonstrated.},
  doi       = {10.1364/OL.38.003194},
  keywords  = {Ultrafast nonlinear optics; Ultrafast phenomena; Supercontinuum generation; Blue shift; Femtosecond pulses; Laser filaments; Laser sources; Raman scattering; Supercontinuum generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-38-16-3194},
}

@Article{Kartashov2012,
  author    = {Daniil Kartashov and Skirmantas Ali\v{s}auskas and Audrius Pug\v{z}lys and Alexander Voronin and Aleksei Zheltikov and Massimo Petrarca and Pierre B\'{e}jot and J\'{e}r\^{o}me Kasparian and Jean-Pierre Wolf and Andrius Baltu\v{s}ka},
  title     = {White light generation over three octaves by femtosecond filament at 3.9~\si{\micro\metre} in argon},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {3456--3458},
  month     = {Aug},
  abstract  = {We report the first (to our knowledge) experimental results and numerical simulations on mid-IR femtosecond pulse filamentation in argon using 0.1\&\#xA0;TW peak-power, 80\&\#xA0;fs, 3.9\&\#xA0;\&\#x3BC;m pulses. A broadband supercontinuum spanning the spectral range from 350\&\#xA0;nm to 5\&\#xA0;\&\#x3BC;m is generated, whereby about 4\% of the mid-IR pulse energy is converted into the 350\&\#x2013;1700\&\#xA0;nm spectral region. These mid-IR\&\#x2013;visible coherent continua offer a new, unique tool for time-resolved spectroscopy based on a mid-IR filamentation laser source.},
  doi       = {10.1364/OL.37.003456},
  keywords  = {Nonlinear optics, four-wave mixing; Self-action effects; Femtosecond phenomena; Femtosecond pulses; Four wave mixing; High power lasers; Laser sources; Numerical simulation; Third harmonic generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-16-3456},
}

@Article{Kartashov2012b,
  author    = {D. Kartashov and S. Ali\v{s}auskas and A. Pug\v{z}lys and A. A. Voronin and A. M. Zheltikov and A. Baltu\v{s}ka},
  title     = {Third- and fifth-harmonic generationby mid-infrared ultrashort pulses: beyond the fifth-order nonlinearity},
  journal   = {Opt. Lett.},
  year      = {2012},
  volume    = {37},
  pages     = {2268--2270},
  month     = {Jun},
  abstract  = {Third- and fifth-harmonic generation by ultrashort laser pulses in themid-infrared (mid-IR) revealsnonlinear-optical effects beyondthe fifth-order nonlinearity and enables, because of an extraordinarily longcoherence length, efficient multiplex frequency upconversion of ultrashortmid-IR pulses. We show that harmonic generation by mid-IR pulses provides anaccess to the key optical constants of gas media, allowing metrology of linearand nonlinear-optical susceptibilities in the mid-IR and offering a tool for theremote sensing of the atmosphere.},
  doi       = {10.1364/OL.37.002268},
  keywords  = {Harmonic generation and mixing ; Ultrafast nonlinear optics; Harmonic generation; High harmonic generation; Nonlinear optics; Nonlinear susceptibility; Ultrafast nonlinear optics; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-37-12-2268},
}

@Article{Keldysh1964,
  author    = {Keldysh, L.V.},
  title     = {Ionization in the Field of a Strong Electromagnetic Wave},
  journal   = {ZhETF},
  year      = {1964},
  volume    = {47},
  pages     = {1945},
  address   = {Country unknown/Code not available},
  keywords  = {PHYSICS, Atomic Physics, ABSORPTION, ATOMS, BREAKDOWN, CROSS SECTIONS, ELECTROMAGNETIC FIELDS, ELECTROMAGNETIC WAVES, ENERGY LEVELS, EQUATIONS, EXCITATION, FREQUENCY, GASES, IONIZATION, LIQUIDS, PARTICLES, PHOTONS, PROBABILITY, RESONANCE, STATISTICS},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://www.osti.gov/servlets/purl/4662394},
}

@Article{Landgraf2013,
  author    = {J\"{o}rg Kohl-Landgraf and Jan-Eric Nimsch and Josef Wachtveitl},
  title     = {{L}i{F}, an underestimated supercontinuum source in femtosecond transient absorption spectroscopy},
  journal   = {Opt. Express},
  year      = {2013},
  volume    = {21},
  pages     = {17060--17065},
  month     = {Jul},
  abstract  = {We present supercontinua generated in LiF and CaF2 revealing that LiF is advantageous especially in the near UV region since it pushes the cut-off wavelength about 17 nm towards lower wavelengths and the occurrence of color centers, which has been considered as a drawback up to now, is not a limitation for its applicability in femtosecond transient absorption spectroscopy. Even though the color centers occur within a short time of illumination, they do not influence the supercontinuum generation significantly and they can furthermore, if desired, be eliminated from the substrate simply by heating. Thus LiF is a promising substrate for broad band measurements in the UV/vis range.},
  doi       = {10.1364/OE.21.017060},
  keywords  = {Nonlinear optics; Ultrafast spectroscopy; Supercontinuum generation; Absorption spectroscopy; Defect center materials; Near ultraviolet; Refractive index; Self phase modulation; White light},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-14-17060},
}

@Article{Kolesik2003,
  Title                    = {Physical Factors Limiting the Spectral Extent and Band Gap Dependence of Supercontinuum Generation},
  Author                   = {Kolesik, M. and Katona, G. and Moloney, J. V. and Wright, E. M.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2003},

  Month                    = {Jul},
  Pages                    = {043905},
  Volume                   = {91},
  Doi                      = {10.1103/PhysRevLett.91.043905},
  Issue                    = {4},
  Numpages                 = {4},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.18},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.91.043905}
}

@Article{Kolesik2010b,
  author    = {M. Kolesik and D. Mirell and J.-C. Diels and J. V. Moloney},
  title     = {On the higher-order {K}err effect in femtosecond filaments},
  journal   = {Opt. Lett.},
  year      = {2010},
  volume    = {35},
  pages     = {3685--3687},
  month     = {Nov},
  abstract  = {A recent experiment probing the electronic nonlinearity in the femtosecond filament indicated that the optical Kerr effect not only saturates but even changes its sign at high intensities and thus switches from self-focusing to a strongly defocusing regime. Here we examine, through simulations and experiment, some implications of such a behavior. We perform comparative simulations based on the standard model on one hand and on a model implementing the intensity-dependent Kerr effect on the other. Comparison with an experiment provides a strong indication that of these two Kerr-effect models the standard model is better in capturing the observed length of the filament. However, neither of the models can reproduce length and filament radius. Possible implications are discussed.},
  doi       = {10.1364/OL.35.003685},
  keywords  = {Femtosecond phenomena; Ultrafast nonlinear optics; Beam expanders; Condensed matter; Kerr effect; Multiphoton ionization; Nonlinear effects; Refractive index},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-35-21-3685},
}

@Article{Kolesik2004,
  Title                    = {Nonlinear optical pulse propagation simulation: From Maxwell's to unidirectional equations},
  Author                   = {Kolesik, M. and Moloney, J. V.},
  Journal                  = {Phys. Rev. E},
  Year                     = {2004},

  Month                    = {Sep},
  Pages                    = {036604},
  Volume                   = {70},

  Doi                      = {10.1103/PhysRevE.70.036604},
  Issue                    = {3},
  Numpages                 = {11},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevE.70.036604}
}

@Article{Kolesik2006,
  author    = {Kolesik, M. and Wright, E.M. and Becker, A. and Moloney, J.V.},
  title     = {Simulation of third-harmonic and supercontinuum generation for femtosecond pulses in air},
  journal   = {Appl. Phys. B},
  year      = {2006},
  volume    = {85},
  pages     = {531--538},
  month     = {Dec},
  issn      = {1432-0649},
  abstract  = {Numerical simulations of third-harmonic and supercontinuum generation for femtosecond pulses propagating in air are presented which, for the first time to the best of our knowledge, do not rely on the decomposition of the total field into slowly-varying fields centered around the fundamental and third-harmonic. The simulation results are interpreted using an effective three-wave mixing approach, and together they provide new insights into the relation between third-harmonic and supercontinuum radiation. },
  day       = {01},
  doi       = {10.1007/s00340-006-2415-7},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1007/s00340-006-2415-7},
}

@Article{Kolesik2010a,
  author    = {M. Kolesik and E. M. Wright and J. V. Moloney},
  title     = {Femtosecond filamentation in air and higher-order nonlinearities},
  journal   = {Opt. Lett.},
  year      = {2010},
  volume    = {35},
  pages     = {2550--2552},
  month     = {Aug},
  abstract  = {According to a recent experiment, the instantaneous electronic Kerr effect in air exhibits a strong intensity dependence, the nonlinear refractive index switching sign and crossing over from a self-focusing to a defocusing nonlinearity. A subsequent theoretical work has demonstrated that this has paradigm-changing consequences for the understanding of filamentation in air, so it is important to subject the idea of higher-order nonlinearities to stringent tests. Here we use numerical modeling to propose an experiment capable of discriminating between the standard and the new intensity-dependent Kerr-effect models.},
  doi       = {10.1364/OL.35.002550},
  keywords  = {Femtosecond phenomena; Ultrafast nonlinear optics; Electric fields; Harmonic generation; Kerr effect; Plasma filaments; Pulse propagation; Refractive index},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-35-15-2550},
}

@Article{Kolesik2007,
  author    = {M. Kolesik and E. M. Wright and J. V. Moloney},
  title     = {Supercontinuum and third-harmonic generation accompanying optical filamentation as first-order scattering processes},
  journal   = {Opt. Lett.},
  year      = {2007},
  volume    = {32},
  pages     = {2816--2818},
  month     = {Oct},
  abstract  = {It is demonstrated numerically that the supercontinuum generation and third-harmonic generation that accompany optical filamentation in nonlinear dispersive bulk media can be described as first-order scattering processes akin to the first Born approximation. In particular, for an incident ultrashort pulse the angularly resolved spectrum of the transmitted pulse is shown to be accurately determined using first-order scattering of the incident field from the nonlinearly modified refractive index due to the optical filament. Thus, although an optical filament is a highly nonlinear object, the accompanying supercontinuum generation and third-harmonic generation are driven parametrically by the filament and have negligible back action upon it.},
  doi       = {10.1364/OL.32.002816},
  keywords  = {Harmonic generation and mixing ; Nonlinear optics, four-wave mixing; Self-action effects; Femtosecond phenomena; Pulses; Femtosecond pulses; In field scattering; Nonlinear effects; Nonlinear optics; Scattering theory; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-32-19-2816},
}

@Article{Kolesik2005,
  author    = {M. Kolesik and E. M. Wright and J. V. Moloney},
  title     = {Interpretation of the spectrally resolved far field of femtosecond pulses propagating in bulk nonlinear dispersive media},
  journal   = {Opt. Express},
  year      = {2005},
  volume    = {13},
  pages     = {10729--10741},
  month     = {Dec},
  abstract  = {It has previously been realized that angle-resolved spectra (or far-field spectra) reflect in detail the complex dynamics of femtosecond pulses propagating in nonlinear dispersive media \[J. Opt. Soc. Am. B 22, 862 (2005)\], and thus represent a potentially useful experimental diagnostic tool. In this paper we extend an effective three-wave mixing approach previously applied to nonlinear X-waves \[Phys. Rev. Lett. 92, 253901 (2004)\] to the analysis of far-field spectra. Theoretical justification for the approach is presented, and a practical method is proposed that makes it possible to interpret all features of far-field spectra, and to extract quantitative information about the underlying intra-pulse dynamics.},
  doi       = {10.1364/OPEX.13.010729},
  keywords  = {Pulse propagation and temporal solitons ; Femtosecond phenomena; Four wave mixing; Phase matching; Phase measurement; Physical optics; Pulse propagation; Three wave mixing},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-13-26-10729},
}

@Article{Kortsalioudakis2005,
  author    = {Kortsalioudakis, N. and Tatarakis, M. and Vakakis, N. and Moustaizis, S.D. and Franco, M. and Prade, B. and Mysyrowicz, A. and Papadogiannis, N.A. and Couairon, A. and Tzortzakis, S.},
  title     = {Enhanced harmonic conversion efficiency in the self-guided propagation of femtosecond ultraviolet laser pulses in argon},
  journal   = {Appl. Phys. B},
  year      = {2005},
  volume    = {80},
  pages     = {211--214},
  month     = {Feb},
  issn      = {1432-0649},
  abstract  = {Harmonic generation during the self-guided propagation of femtosecond ultraviolet (UV) laser pulses (248-nm, 450-fs) in argon is investigated. The third (82.7-nm) and fifth (49.6-nm) harmonics are generated in the UV filament. The energy-conversion efficiencies for the harmonics are found to be at least two orders of magnitude higher than those reported in the literature for similar gas pressures. The enhancement is attributed to the quasi-phase matching of the harmonics due to the self-guiding of the driving pulse. },
  day       = {01},
  doi       = {10.1007/s00340-004-1683-3},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1007/s00340-004-1683-3},
}

@Article{Krupke1986,
  author    = {W. F. Krupke and M. D. Shinn and J. E. Marion and J. A. Caird and S. E. Stokowski},
  title     = {Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet},
  journal   = {J. Opt. Soc. Am. B},
  year      = {1986},
  volume    = {3},
  pages     = {102--114},
  month     = {Jan},
  abstract  = {Spectroscopic, optical, and thermomechanical properties of gadolinium scandium gallium garnet doped with trivalent neodymium and/or chromium are reported for use in the design of high-power solid-state lasers.},
  doi       = {10.1364/JOSAB.3.000102},
  keywords  = {Energy transfer; Laser applications; Laser materials; Q switched lasers; Solid state laser materials; Solid state lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-3-1-102},
}

@Article{Kudarauskas2018,
  author    = {Kudarauskas,D. and Tamo\v{s}auskas,G. and Vengris,M. and Dubietis,A.},
  title     = {Filament-induced luminescence and supercontinuum generation in undoped, {Yb}-doped, and {Nd}-doped {YAG} crystals},
  journal   = {Appl. Phys. Lett.},
  year      = {2018},
  volume    = {112},
  pages     = {041103},
  doi       = {10.1063/1.5009530},
  eprint    = {https://doi.org/10.1063/1.5009530},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = { 
 https://doi.org/10.1063/1.5009530
 
},
}

@Article{Kuznetsov2016,
  author    = {A V Kuznetsov and V O Kompanets and A E Dormidonov and S V Chekalin and S A Shlenov and V P Kandidov},
  title     = {Periodic colour-centre structure formed under filamentation of mid-{IR} femtosecond laser radiation in a {LiF} crystal},
  journal   = {Quantum Electron.},
  year      = {2016},
  volume    = {46},
  pages     = {379--386},
  month     = {apr},
  annote    = {A colour-centre structure formed in a LiF crystal under filamentation of a femtosecond mid-IR laser pulse with a power slightly exceeding the critical power for self-focusing has been experimentally and theoretically investigated. Strictly periodic oscillations have been detected for the first time for the density of the colour centres induced in an isotropic LiF crystal under filamentation of a laser beam with a wavelength tuned in the range from 2600 to 3350 nm. The structure period is found to be about 30 Ојm. With an increase in the laser radiation wavelength, the period of the oscillations decreases and their amplitude increases. The maximum colour centre density, observed under filamentation of a 3100-nm beam, is related to the increased contribution of the direct generation of colour centres as a result of the absorption of an integer number of photons by the exciton band. It is numerically shown that the formation of a periodic colour-centre structure in LiF is due to the periodic change in the light field amplitude in the light bullet (1.5 optical periods long) formed under filamentation.},
  doi       = {10.1070/qel16038},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1070%2Fqel16038},
}

@Article{Lanin2015,
  author    = {A. A. Lanin and A. A. Voronin and E. A. Stepanov and A. B. Fedotov and A. M. Zheltikov},
  title     = {Multioctave, 3--18~\si{\micro\metre} sub-two-cycle supercontinua from self-compressing, self-focusing soliton transients in a solid},
  journal   = {Opt. Lett.},
  year      = {2015},
  volume    = {40},
  pages     = {974--977},
  month     = {Mar},
  abstract  = {Strongly coupled nonlinear spatiotemporal dynamics of ultrashort mid-infrared pulses undergoing self-focusing simultaneously with soliton self-compression in an anomalously dispersive, highly nonlinear solid semiconductor is shown to enable the generation of multioctave supercontinua with spectra spanning the entire mid-infrared range and compressible to subcycle pulse widths. With 7.9\&\#xA0;\&\#x3BC;m, 150\&\#xA0;fs, 2\&\#xA0;\&\#x3BC;J, 1\&\#xA0;kHz pulses used as a driver, 1.2 cycle pulses of mid-infrared supercontinuum radiation with a spectrum spanning the range of wavelengths from 3 to 18\&\#xA0;\&\#x3BC;m were generated in a 5\&\#xA0;mm GaAs plate. Further compression of these pulses to subcycle pulse widths is possible through compensation of the residual phase shift.},
  doi       = {10.1364/OL.40.000974},
  keywords  = {Pulse compression; Ultrafast nonlinear optics; Pulse compression; Self action effects; Supercontinuum generation; Ultrafast nonlinear optics; Ultrafast optics; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-40-6-974},
}

@Article{Liang2015,
  author    = {Houkun Liang and Peter Krogen and Ross Grynko and Ondrej Novak and Chun-Lin Chang and Gregory J. Stein and Darshana Weerawarne and Bonggu Shim and Franz X. K\"{a}rtner and Kyung-Han Hong},
  title     = {Three-octave-spanning supercontinuum generation and sub-two-cycle self-compression of mid-infrared filaments in dielectrics},
  journal   = {Opt. Lett.},
  year      = {2015},
  volume    = {40},
  pages     = {1069--1072},
  month     = {Mar},
  abstract  = {We experimentally and numerically investigate the spectral and temporal structure of mid-infrared (mid-IR) filaments in bulk dielectrics with normal and anomalous group velocity dispersion (GVD) pumped by a 2.1\&\#xA0;\&\#x3BC;m optical parametric chirped-pulse amplifier (OPCPA). The formation of stable and robust filaments with several microjoules of pulse energy is observed. We demonstrate a supercontinuum that spans more than three octaves from ZnS in the normal GVD regime and self-compression of the mid-IR pulse to sub-two-cycle duration in CaF2 in the anomalous GVD regime. The experimental observations quantitatively agree well with the numerical simulations based on a three-dimensional nonlinear wave equation that reveals the detailed spatio-temporal dynamics of mid-IR filaments in dielectrics.},
  doi       = {10.1364/OL.40.001069},
  keywords  = {Pulse compression; Ultrafast nonlinear optics; Supercontinuum generation; Laser amplifiers; Optical amplifiers; Optical coherence tomography; Self phase modulation; Strong field physics; Ultrafast lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-40-6-1069},
}

@Article{Liao2013a,
  author    = {Meisong Liao and Weiqing Gao and Tonglei Cheng and Zhongchao Duan and Xiaojie Xue and Hiroyasu Kawashima and Takenobu Suzuki and Yasutake Ohishi},
  title     = {Ultrabroad supercontinuum generation through filamentation in tellurite glass},
  journal   = {Laser Phys. Lett.},
  year      = {2013},
  volume    = {10},
  pages     = {036002},
  month     = {jan},
  annote    = {Although soft glass such as tellurite or chalcogenide glass is transparent in the range of 3вЂ“6В Ојm, fiber made of it is difficult to generate as a supercontinuum (SC) to that range because of the high loss, the wavelength limit of the pump source, and the challenges in light-coupling. To circumvent these problems, we developed an SC light source by using tellurite bulk glass through filamentation. For this scheme, the optical path length in the glass is very short due to the adopted high pump power, so the negative influence of material loss is reduced greatly. The light-coupling is straightforward, and the coupling efficiency is high. The bulk glass for SC generation is cheap, and can be fabricated easily. We have shown that under suitable pump conditions, the SC generation by filamentation can cover from visible to 6В Ојm. It is the broadest SC generation by tellurite (including glass and fiber). For suitable pump conditions, the glass was free of optical breakdown. If the interface reflections were deducted, the SC conversion efficiency was 87%; the SC conversion efficiency was stable. To the best of our knowledge, this is the first report on filamentation in tellurite glass which has a comparatively small bandgap.},
  doi       = {10.1088/1612-2011/10/3/036002},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F1612-2011%2F10%2F3%2F036002},
}

@Article{Liao2013b,
  author    = {Meisong Liao and Weiqing Gao and Tonglei Cheng and Xiaojie Xue and Zhongchao Duan and Dinghuan Deng and Hiroyasu Kawashima and Takenobu Suzuki and Yasutake Ohishi},
  title     = {Five-Octave-Spanning Supercontinuum Generation in Fluoride Glass},
  journal   = {Appl. Phys Express},
  year      = {2013},
  volume    = {6},
  pages     = {032503},
  month     = {mar},
  annote    = {An ultra-broadband supercontinuum (SC) covering 0.2вЂ“8.0 Вµm which is more than 5 octaves, is demonstrated in a piece of fluoride glass. The 20 dB bandwidth spans from 0.39 to 7.4 Вµm. The filaments, bright conic visible emission, and interference fringe pattern are observed. The glass thickness, optical path, and pump conditions are optimized to enable the SC to cover the entire transmission range of the glass, which includes the whole functional group region of chemical bands and groups. The SC conversion efficiency is confirmed to be stable.},
  doi       = {10.7567/apex.6.032503},
  owner     = {NAG},
  publisher = {Japan Society of Applied Physics},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.7567%2Fapex.6.032503},
}

@Article{Lim2014,
  author    = {Lim, Khan and Durand, Magali and Baudelet, Matthieu and Richardson, Martin},
  title     = {Transition from linear- to nonlinear-focusing regime in filamentation},
  journal   = {Sci. Rep.},
  year      = {2014},
  volume    = {4},
  pages     = {7217},
  month     = dec,
  owner     = {NAG},
  publisher = {The Author(s)},
  timestamp = {2019.02.14},
  url       = {https://doi.org/10.1038/srep07217},
}

@Article{Liu2006,
  Title                    = {Few-cycle spatiotemporal soliton wave excited by filamentation of a femtosecond laser pulse in materials with anomalous dispersion},
  Author                   = {Liu, Jiansheng and Li, Ruxin and Xu, Zhizhan},
  Journal                  = {Phys. Rev. A},
  Year                     = {2006},

  Month                    = {Oct},
  Pages                    = {043801},
  Volume                   = {74},

  Doi                      = {10.1103/PhysRevA.74.043801},
  Issue                    = {4},
  Numpages                 = {5},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.74.043801}
}

@Article{Liu2011,
  author    = {Yi Liu and Magali Durand and AurГ©lien Houard and Benjamin Forestier and Arnaud Couairon and AndrГ© Mysyrowicz},
  title     = {Efficient generation of third harmonic radiation in air filaments: A revisit},
  journal   = {Opt. Commun.},
  year      = {2011},
  volume    = {284},
  pages     = {4706--4713},
  issn      = {0030-4018},
  abstract  = {In this paper we revisit the third harmonic generation from a femtosecond laser filament in air and its significant enhancement (~100 times) with a intercepting pump pulse, which has been reported very recently. The enhanced third harmonic is studied as a function of the pulse polarization, time delay between the pump and signal pulses, laser pulse energy, etc. We provide an explanation for the enhancement of third harmonic based on a quenching of interference effects present near filamentation threshold. Simulations based on a two-color propagation code reproduce well the experimental observations and confirm our interpretation.},
  doi       = {https://doi.org/10.1016/j.optcom.2011.05.050},
  keywords  = {Third harmonic generation, Femtosecond pulse, Femtosecond filament},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {http://www.sciencedirect.com/science/article/pii/S0030401811005931},
}

@Article{Loures2015,
  author    = {Cristian Redondo Loures and Andrea Armaroli and Fabio Biancalana},
  title     = {Contribution of third-harmonic and negative-frequency polarization fields to self-phase modulation in nonlinear media},
  journal   = {Opt. Lett.},
  year      = {2015},
  volume    = {40},
  pages     = {613--616},
  month     = {Feb},
  abstract  = {We study the influence of third-harmonic generation (THG) and negative-frequency polarization terms in the self-phase modulation (SPM) of short and intense pulses in Kerr media. We find that THG induces additional symmetric lobes in the SPM process. The amplitude of these new sidebands are greatly enhanced by the contributions of the negative-frequency Kerr (NFK) term and the shock operator. We compare our theoretical predictions based on the analytical nonlinear phase with simulations carried out by using the full unidirectional pulse propagation equation (UPPE).},
  doi       = {10.1364/OL.40.000613},
  keywords  = {Nonlinear optical materials; Nonlinear optics; Nonlinear optics, four-wave mixing; Self-action effects; Nonlinear effects; Nonlinear optics; Phase velocity; Pulse propagation; Raman scattering; Self phase modulation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-40-4-613},
}

@Article{Major2004,
  author    = {Arkady Major and Fumiyo Yoshino and Irkalis Nikolakakos and J. Stewart Aitchison and Peter W. E. Smith},
  title     = {Dispersion of the nonlinear refractive index in sapphire},
  journal   = {Opt. Lett.},
  year      = {2004},
  volume    = {29},
  pages     = {602--604},
  month     = {Mar},
  abstract  = {The nonlinear refractive index, n2, of sapphire was experimentally measured in the 550--1550-nm wavelength range by use of a picosecond Z-scan technique. It was found that in this spectral region the value of n2 decreases monotonically from $\sim$3.3{\texttimes}10-16 to $\sim$2.8{\texttimes}10-16В cm2/W. An empirical expression for the wavelength dependence of the nonlinear refractive index in the 270--1550-nm range was obtained.},
  doi       = {10.1364/OL.29.000602},
  keywords  = {Laser materials; Nonlinear optics, materials; Optical nonlinearities of condensed matter; Laser crystals; Laser sources; Optical amplifiers; Refractive index; Self phase modulation; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-29-6-602},
}

@Article{Majus2011,
  author    = {D. Majus and V. Jukna and E. Pileckis and G. Valiulis and A. Dubietis},
  title     = {Rogue-wave-like statistics in ultrafast white-light continuum generation in sapphire},
  journal   = {Opt. Express},
  year      = {2011},
  volume    = {19},
  pages     = {16317--16323},
  month     = {Aug},
  abstract  = {We experimentally study the statistics of the white-light continuum generated by focusing of 130 fs, 800 nm pulses in a sapphire plate and show that the statistical distributions of the spectral intensity of the blue-shifted continuum components obey the extreme-value statistics. This rogue-wave-like behavior is detected only within a narrow input-pulse energy interval. By the use of numerical simulations, we show that the observed rogue-wave-like behavior is associated with pulse splitting and build-up of intense trailing pulse. The extreme events are thereafter suppressed by the intensity clamping.},
  doi       = {10.1364/OE.19.016317},
  keywords  = {Nonlinear optics, four-wave mixing; Self-action effects; Ultrafast nonlinear optics; Laser beams; Laser operation; Phase matching; Phase noise; Photonic crystal fibers; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-17-16317},
}

@Article{Majus2014,
  author    = {Majus, D. and Tamo\ifmmode \check{s}\else \v{s}\fi{}auskas, G. and Gra\ifmmode \check{z}\else \v{z}\fi{}ulevi\ifmmode \check{c}\else \v{c}\fi{}i\ifmmode \bar{u}\else \={u}\fi{}t\ifmmode \dot{e}\else \.{e}\fi{}, I. and Garejev, N. and Lotti, A. and Couairon, A. and Faccio, D. and Dubietis, A.},
  title     = {Nature of Spatiotemporal Light Bullets in Bulk {K}err Media},
  journal   = {Phys. Rev. Lett.},
  year      = {2014},
  volume    = {112},
  pages     = {193901},
  month     = {May},
  doi       = {10.1103/PhysRevLett.112.193901},
  issue     = {19},
  numpages  = {5},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.14},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.112.193901},
}

@Article{Mao2007,
  author    = {Guilin Mao and Yeheng Wu and Kenneth D. Singer},
  title     = {Third harmonic generation in self-focused filaments in liquids},
  journal   = {Opt. Express},
  year      = {2007},
  volume    = {15},
  pages     = {4857--4862},
  month     = {Apr},
  abstract  = {Intense filaments of third harmonic generation have been observed in a variety of liquids when pumped by 1300 nm wavelength femtosecond light. The onset of third harmonic generation coincides with the threshold for self-focusing as deduced from n2 measurements performed on the liquids using the z-scan technique. We have found self-phase modulation above the threshold leading to continuum generation at about 3 times threshold. In the third-harmonic regime, the third harmonic output power is independent of the input power. Our observations are consistent with those for similar processes in gases as described by a phase-locking model. The measured conversion efficiency was approximately 10-6.},
  doi       = {10.1364/OE.15.004857},
  keywords  = {Harmonic generation and mixing ; Self-action effects; Laser sources; Narrow band filters; Self phase modulation; Supercontinuum generation; Third harmonic generation; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-15-8-4857},
}

@Article{Marcinkeviciute2017,
  author    = {Agn{\.{e}} Marcinkevi{\v{c}}i{\={u}}t{\.{e}} and Nail Garejev and Rosvaldas {\v{S}}uminas and Gintaras Tamo{\v{s}}auskas and Audrius Dubietis},
  title     = {A compact, self-compression-based sub-3 optical cycle source in the 3--4~\si{\micro\metre} spectral range},
  journal   = {J. Opt.},
  year      = {2017},
  volume    = {19},
  pages     = {105505},
  month     = {sep},
  annote    = {We report on the experimental realization of a compact, Ti:sapphire laser-pumped mid-infrared light source, which delivers sub-3 optical cycle pulses in the spectral range. The light source employs difference frequency generation in potassium titanyl arsenate crystal by mixing the signal and idler waves from a commercial near-infrared optical parametric amplifier and subsequent optical parametric amplification in LiIO3 crystal. The amplified sub-100 fs mid-infrared pulses are self-compressed down to sub-3 optical cycles by nonlinear propagation in few mm thick YAG, CaF2 and BaF2 crystals featuring anomalous group velocity dispersion in that spectral range. The self-compression is performed without the onset of self-focusing effects, hence maintaining a homogenous beam profile with energy throughput efficiency of above 90%, yielding the self-compressed pulses with sub- energy. Even larger self-compression factors (down to sub-2 optical cycles) were achieved in the filamentation regime, simultaneously producing an ultrabroadband supercontinuum, extending from the visible to the mid-infrared.},
  doi       = {10.1088/2040-8986/aa873b},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F2040-8986%2Faa873b},
}

@Article{Milam1977,
  author    = {Milam,D. and Weber,M. J. and Glass,A. J.},
  title     = {Nonlinear refractive index of fluoride crystals},
  journal   = {Appl. Phys. Lett.},
  year      = {1977},
  volume    = {31},
  pages     = {822--825},
  doi       = {10.1063/1.89561},
  eprint    = {https://doi.org/10.1063/1.89561},
  owner     = {NAG},
  timestamp = {2019.02.08},
  url       = { 
 https://doi.org/10.1063/1.89561
 
},
}

@Article{Mitrofanov2015,
  author    = {A. V. Mitrofanov and A. A. Voronin and S. I. Mitryukovskiy and D. A. Sidorov-Biryukov and A. Pug\v{z}lys and G. Andriukaitis and T. Fl\"{o}ry and E. A. Stepanov and A. B. Fedotov and A. Baltu\v{s}ka and A. M. Zheltikov},
  title     = {Mid-infrared-to-mid-ultraviolet supercontinuum enhanced by third-to-fifteenth odd harmonics},
  journal   = {Opt. Lett.},
  year      = {2015},
  volume    = {40},
  pages     = {2068--2071},
  month     = {May},
  abstract  = {A high-energy supercontinuum spanning 4.7 octaves, from 250 to 6500\&\#xA0;nm, is generated using a 0.3-TW, 3.9-\&\#x3BC;m output of a mid-infrared optical parametric chirped-pulse amplifier as a driver inducing a laser filament in the air. The high-frequency wing of the supercontinuum spectrum is enhanced by odd-order optical harmonics of the mid-infrared driver. Optical harmonics up to the 15th order are observed in supercontinuum spectra as overlapping, yet well-resolved peaks broadened, as verified by numerical modeling, due to spatially nonuniform ionization-induced blue shift.},
  doi       = {10.1364/OL.40.002068},
  keywords  = {Self-action effects; Ultrafast nonlinear optics; Harmonic generation; Laser filaments; Laser induced damage thresholds; Optical amplifiers; Phase matching; Supercontinuum generation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.14},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-40-9-2068},
}

@Article{Mitrofanov2015b,
  author    = {Mitrofanov, A. V. and Voronin, A. A. and Sidorov-Biryukov, D. A. and PugЕѕlys, A. and Stepanov, E. A. and Andriukaitis, G. and FlГ¶ry, T. and AliЕЎauskas, S. and Fedotov, A. B. and BaltuЕЎka, A. and Zheltikov, A. M.},
  title     = {Mid-infrared laser filaments in the atmosphere},
  journal   = {Sci. Rep.},
  year      = {2015},
  volume    = {5},
  pages     = {8368},
  month     = feb,
  owner     = {NAG},
  publisher = {The Author(s)},
  timestamp = {2019.02.14},
  url       = {https://doi.org/10.1038/srep08368},
}

@Article{Mlejnek1998,
  author    = {M. Mlejnek and E. M. Wright and J. V. Moloney},
  title     = {Dynamic spatial replenishment of femtosecond pulses propagating in air},
  journal   = {Opt. Lett.},
  year      = {1998},
  volume    = {23},
  pages     = {382--384},
  month     = {Mar},
  abstract  = {We present numerical simulations of nonlinear pulse propagation in air whereby an initial pulse is formed, absorbed by plasma generation, and subsequently replenished by power from the trailing edge of the pulse. This process can occur more than once for high-power input pulses and produce the illusion of long-distance propagation of one self-guided pulse.},
  doi       = {10.1364/OL.23.000382},
  keywords  = {Kerr effect; Raman effect; Photoionization; Self-focusing; Femtosecond phenomena; Absorption coefficient; Light filaments; Numerical simulation; Pulse compression; Pulse propagation; Raman scattering},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-23-5-382},
}

@Article{Mlejnek1999,
  Title                    = {Second Harmonic Generation of Femtosecond Pulses at the Boundary of a Nonlinear Dielectric},
  Author                   = {Mlejnek, M. and Wright, E. M. and Moloney, J. V. and Bloembergen, N.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {1999},

  Month                    = {Oct},
  Pages                    = {2934--2937},
  Volume                   = {83},

  Doi                      = {10.1103/PhysRevLett.83.2934},
  Issue                    = {15},
  Numpages                 = {0},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.83.2934}
}

@Article{Moll2004,
  author    = {K. D. Moll and Alexander L. Gaeta},
  title     = {Role of dispersion in multiple-collapse dynamics},
  journal   = {Opt. Lett.},
  year      = {2004},
  volume    = {29},
  pages     = {995--997},
  month     = {May},
  abstract  = {The multiple-collapse dynamics of ultrashort pulses along the propagation direction are investigated under conditions of both normal and anomalous group-velocity dispersion (GVD). In the anomalous-GVD regime we find that collapse events can occur at locations in the medium many diffraction lengths beyond the initial collapse point, in contrast with the normal-GVD regime in which multiple collapse occurs within a diffraction length. Numerical simulations of a modified nonlinear envelope equation are found to be in good qualitative agreement with the observed lengths of the filaments.},
  doi       = {10.1364/OL.29.000995},
  keywords  = {Kerr effect; Pulse propagation and temporal solitons ; Ultrafast nonlinear optics; Self-focusing; Femtosecond phenomena; Absorption coefficient; Electric fields; Pulse propagation; Refractive index; Ti:sapphire lasers; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-29-9-995},
}

@Article{Moll2002,
  Title                    = {Conical Harmonic Generation in Isotropic Materials},
  Author                   = {Moll, K. D. and Homoelle, D. and Gaeta, Alexander L. and Boyd, Robert W.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2002},

  Month                    = {Apr},
  Pages                    = {153901},
  Volume                   = {88},

  Doi                      = {10.1103/PhysRevLett.88.153901},
  Issue                    = {15},
  Numpages                 = {4},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.08},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.88.153901}
}

@Article{Morono1997,
  author    = {A. Moro{\~{n}}o and E.R. Hodgson},
  title     = {On the origin of the F+ centre radioluminescence in sapphire},
  journal   = {J. Nucl. Mater.},
  year      = {1997},
  volume    = {249},
  pages     = {128--132},
  issn      = {0022-3115},
  abstract  = {Electron irradiation of sapphire produces primarily F centres, in marked contrast with neutron and ion irradiations where both F and F+ centres are produced. However, radioluminescence studies during electron irradiation indicate bands associated with both F and F+ centres. These emission bands show a complex dependence on dose rate and temperature. A systematic study of the radioluminescence spectra as a function of these two parameters together with optical absorption measurements indicate that the ionization of F centres is the cause of the F+ centre radioluminescence. A model describing the way the F+ emission occurs is proposed and compared with the results obtained.},
  doi       = {https://doi.org/10.1016/S0022-3115(97)00227-4},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {http://www.sciencedirect.com/science/article/pii/S0022311597002274},
}

@Article{Mouawad2015,
  author    = {Mouawad, O. and B{\'e}jot, P. and Billard, F. and Mathey, P. and Kibler, B. and D{\'e}s{\'e}v{\'e}davy, F. and Gadret, G. and Jules, J.-C. and Faucher, O. and Smektala, F.},
  title     = {Mid-infrared filamentation-induced supercontinuum in {As--S} and an {As}-free {Ge--S} counterpart chalcogenide glasses},
  journal   = {Appl. Phys. B},
  year      = {2015},
  volume    = {121},
  pages     = {433--438},
  month     = {Dec},
  issn      = {1432-0649},
  abstract  = {We experimentally investigate supercontinuum generation in conventional As2S3 and GeS3 bulk chalcogenide glass materials pumped by high-power mid-infrared femtosecond pulses. Mid-infrared supercontinuum spectra are successfully reported through the filamentation of {\textmu}J-level energy pulses at wavelengths close to the bulk's zero dispersion wavelength, i.e., in both normal and anomalous dispersion regimes. The main features of our results are twofold. On the one hand, a GeS3 non-toxic As-free glass is successfully conceived and proved suitable for mid-infrared supercontinuum generation. On the other hand, 3.3-mm-long bulk samples are sufficient to enable the spectral coverage from 2.5 to {\textasciitilde}11В {\textmu}m in a 20-dB dynamic range, thus reaching the multiphonon absorption edge for both chalcogenide glasses.},
  day       = {01},
  doi       = {10.1007/s00340-015-6249-z},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1007/s00340-015-6249-z},
}

@Article{Mouawad2016,
  author    = {O. Mouawad and P. B{\'e}jot and F. Billard and P. Mathey and B. Kibler and F. D{\'e}s{\'e}v{\'e}davy and G. Gadret and J.-C. Jules and O. Faucher and F. Smektala},
  title     = {Filament-induced visible-to-mid-{IR} supercontinuum in a {ZnSe} crystal: Towards multi-octave supercontinuum absorption spectroscopy},
  journal   = {Opt. Mater.},
  year      = {2016},
  volume    = {60},
  pages     = {355--358},
  issn      = {0925-3467},
  abstract  = {We report on the generation of multiple-octave supercontinuum laser source spanning from 0.5В Ојm to 11В Ојm induced by multi-filamentation in a ZnSe crystal. The generated supercontinuum is both spatially and spectrally characterized. It is then exploited in a proof-of-principle experiment for methane spectroscopy measurements by means of the supercontinuum absorption spectroscopy technique. The entire absorption spectrum is successfully recorded within the whole spectral bandwidth of the supercontinuum. Experimental results are in fairly good agreement with the HITRAN database, confirming the reliability and stability over several hours of the generated supercontinuum.},
  doi       = {https://doi.org/10.1016/j.optmat.2016.08.009},
  keywords  = {Supercontinuum generation, Multifilaments, Methane sensing, Infrared laser sources},
  owner     = {NAG},
  timestamp = {2019.02.18},
  url       = {http://www.sciencedirect.com/science/article/pii/S0925346716304141},
}

@Article{Nagura2002,
  author    = {Chihiro Nagura and Akira Suda and Hiroyuki Kawano and Minoru Obara and Katsumi Midorikawa},
  title     = {Generation and characterization of ultrafast white-light continuum in condensed media},
  journal   = {Appl. Opt.},
  year      = {2002},
  volume    = {41},
  pages     = {3735--3742},
  month     = {Jun},
  abstract  = {The generation of white-light continuum by femtosecond laser pulses in transparent condensed media is investigated comprehensively with 262-, 393-, and 785-nm pump wavelengths. We find that the ratio of the medium's bandgap energy to the photon energy of the incident wavelength determines the amount of anti-Stokes broadening, independently of the pump wavelength and the medium's bandgap. It is also shown that, although the amount of anti-Stokes broadening is greater for the longer pump wavelength, the shorter pump wavelength is more advantageous for generating shorter-wavelength continua in the UV region. In addition, a self-induced change in polarization of the white-light continuum that is generated is observed in an isotropic material with a cubic crystal structure, such as CaF2 and LiF. After the investigation of polarization, the frequency chirp of the continuum is characterized by the Kerr-gate method with 70-fs temporal and 10-nm wavelength resolution.},
  doi       = {10.1364/AO.41.003735},
  keywords  = {Nonlinear optics; Optical nonlinearities of condensed matter; Ultrafast nonlinear optics; Light beams; Optical fields; Phase shift; Photon counting; Self phase modulation; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ao.osa.org/abstract.cfm?URI=ao-41-18-3735},
}

@Article{Nath2013,
  author    = {Arpita Nath and Jayashree A. Dharmadhikari and Aditya K. Dharmadhikari and Deepak Mathur},
  title     = {Seventh-harmonic generation from tightly focused 2~\si{\micro\metre} ultrashort pulses in air},
  journal   = {Opt. Lett.},
  year      = {2013},
  volume    = {38},
  pages     = {2560--2562},
  month     = {Jul},
  abstract  = {We report generation of third, fifth and seventh harmonics from air by using tightly focused, ultrashort pulses of short-wave infrared (2\&\#xA0;\&\#x3BC;m) radiation. We have measured the third- and fifth-harmonic efficiencies to be 5\&\#xD7;10\&\#x2212;5 and \&\#x223C;1.4\&\#xD7;10\&\#x2212;5, respectively, with the ratio of fifth-to-third-harmonic efficiency being close to 0.28. Our experimental results provide confirmation of expectations of the higher-order Kerr effect model.},
  doi       = {10.1364/OL.38.002560},
  keywords  = {Harmonic generation and mixing ; Kerr effect; Ultrafast nonlinear optics; Ultrafast phenomena; Harmonic generation; High harmonic generation; Kerr effect; Nonlinear optics; Phase matching; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-38-14-2560},
}

@Article{Naudeau2006,
  author    = {M. L. Naudeau and R. J. Law and T. S. Luk and T. R. Nelson and S. M. Cameron and J. V. Rudd},
  title     = {Observation of nonlinear optical phenomena in air and fused silica using a 100~{GW}, 1.54~\si{\micro\metre} source},
  journal   = {Opt. Express},
  year      = {2006},
  volume    = {14},
  pages     = {6194--6200},
  month     = {Jun},
  abstract  = {A 100-GW optical parametric chirped-pulse amplifier system is used to study nonlinear effects in the 1.54 {\textmu}m regime. When focusing this beam in air, strong third-harmonic generation (THG) is observed, and both the spectra and efficiency are measured. Broadening is observed on only the blue side of the third-harmonic signal and an energy conversion efficiency of 0.2\% is achieved. When propagated through a 10-cm block of fused silica, a collimated beam is seen to collapse and form multiple filaments. The measured spectral features span 400--2100 nm. The spectrum is dominated by previously unobserved Stokes emissions and broad emissions in the visible.},
  doi       = {10.1364/OE.14.006194},
  keywords  = {Harmonic generation and mixing ; Parametric oscillators and amplifiers; Ultrafast lasers; Ultrafast nonlinear optics; Fused silica; Laser systems; Phase matching; Raman amplifiers; Self phase modulation; Spectroscopy},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-14-13-6194},
}

@Article{Nguyen2003,
  author    = {N. T. Nguyen and A. Saliminia and W. Liu and S. L. Chin and R. Vall\'{e}e},
  title     = {Optical breakdown versus filamentation in fused silica by use of femtosecond infrared laser pulses},
  journal   = {Opt. Lett.},
  year      = {2003},
  volume    = {28},
  pages     = {1591--1593},
  month     = {Sep},
  abstract  = {The competition between optical breakdown (OB) and laser-pulse filamentation (FL) in bulk fused silica is investigated by using a 1-kHz femtosecond infrared laser. We measure input powers corresponding to the threshold of OB and FL in terms of external focusing conditions. The results demonstrate that OB precedes FL for tight focusing, whereas for sufficiently long focal lengths FL takes places at a lower power than OB does.},
  doi       = {10.1364/OL.28.001591},
  keywords  = {Laser-induced breakdown; Silica; Self-focusing; Femtosecond phenomena; Fused silica; High power lasers; Laser beams; Laser energy; Laser scattering; Self phase modulation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-28-17-1591},
}

@Article{Ni2011,
  Title                    = {Comparative investigation of third- and fifth-harmonic generation in atomic and molecular gases driven by midinfrared ultrafast laser pulses},
  Author                   = {Ni, Jielei and Yao, Jinping and Zeng, Bin and Chu, Wei and Li, Guihua and Zhang, Haisu and Jing, Chenrui and Chin, S. L. and Cheng, Y. and Xu, Z.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2011},

  Month                    = {Dec},
  Pages                    = {063846},
  Volume                   = {84},

  Doi                      = {10.1103/PhysRevA.84.063846},
  Issue                    = {6},
  Numpages                 = {4},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.08},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.84.063846}
}

@Article{Nikolov2007,
  author    = {Ivaylo Nikolov and Alexander Gaydardzhiev and Ivan Buchvarov and Pancho Tzankov and Frank Noack and Valentin Petrov},
  title     = {Ultrabroadband continuum amplification in the near infrared using BiB3O6 nonlinear crystals pumped at 800 nm},
  journal   = {Opt. Lett.},
  year      = {2007},
  volume    = {32},
  pages     = {3342--3344},
  month     = {Nov},
  abstract  = {Ultrabroadband parametric amplification of a white-light continuum in the near IR (~100 THz, 1.2-2.4 $\mu$m) is demonstrated in BiB3O6 pumped by 45 fs long pulses at 800 nm at a repetition rate of 1 kHz. The energy obtained with a 5 mm thick crystal reached 50 $\mu$J, corresponding to external conversion efficiency of 20\%.},
  doi       = {10.1364/OL.32.003342},
  keywords  = {Parametric oscillators and amplifiers; Ultrafast nonlinear optics; Laser amplifiers; Laser systems; Nonlinear optical crystals; Pulse compression; Spectral properties; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.08},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-32-22-3342},
}

@Article{Panagiotopoulos2015,
  author    = {Panagiotopoulos, Paris and Whalen, Patrick and Kolesik, Miroslav and Moloney, Jerome V.},
  title     = {Super high power mid-infrared femtosecond light bullet},
  journal   = {Nat. Photonics},
  year      = {2015},
  volume    = {9},
  pages     = {543--548},
  month     = jul,
  owner     = {NAG},
  publisher = {Nature Publishing Group},
  timestamp = {2019.02.14},
  url       = {https://doi.org/10.1038/nphoton.2015.125},
}

@Article{Popmintchev2012,
  author    = {Popmintchev, Tenio and Chen, Ming-Chang and Popmintchev, Dimitar and Arpin, Paul and Brown, Susannah and Ali{\v s}auskas, Skirmantas and Andriukaitis, Giedrius and Bal{\v c}iunas, Tadas and M{\"u}cke, Oliver D. and Pugzlys, Audrius and Baltu{\v s}ka, Andrius and Shim, Bonggu and Schrauth, Samuel E. and Gaeta, Alexander and Hern{\'a}ndez-Garc{\'\i}a, Carlos and Plaja, Luis and Becker, Andreas and Jaron-Becker, Agnieszka and Murnane, Margaret M. and Kapteyn, Henry C.},
  title     = {Bright Coherent Ultrahigh Harmonics in the {keV} {X}-ray Regime from Mid-Infrared Femtosecond Lasers},
  journal   = {Science},
  year      = {2012},
  volume    = {336},
  pages     = {1287--1291},
  issn      = {0036-8075},
  abstract  = {When you play a string instrument, you raise the frequency, or pitch, of the note by shortening the vibrating portion of the string: Drop the length in half, and you hear a harmonic at double the frequency. It is possible to do essentially the same thing with light waves by using selective excitation and relaxation processes of the electrons in crystals or high-pressure gases through which the beam of light is directed to produce light harmonics. Over the past decade, researchers have been optimizing the conversion of red light to the far edge of the ultraviolet, which corresponds to tens of harmonics. Popmintchev et al. (p. 1287) now show that mid-infrared light can undergo a process in high-pressure gas to generate ultrahigh harmonics up to orders greater than 5000 in the x-ray regime.High-harmonic generation (HHG) traditionally combines ~100 near-infrared laser photons to generate bright, phase-matched, extreme ultraviolet beams when the emission from many atoms adds constructively. Here, we show that by guiding a mid-infrared femtosecond laser in a high-pressure gas, ultrahigh harmonics can be generated, up to orders greater than 5000, that emerge as a bright supercontinuum that spans the entire electromagnetic spectrum from the ultraviolet to more than 1.6 kilo{\textendash}electron volts, allowing, in principle, the generation of pulses as short as 2.5 attoseconds. The multiatmosphere gas pressures required for bright, phase-matched emission also support laser beam self-confinement, further enhancing the x-ray yield. Finally, the x-ray beam exhibits high spatial coherence, even though at high gas density the recolliding electrons responsible for HHG encounter other atoms during the emission process.},
  doi       = {10.1126/science.1218497},
  eprint    = {http://science.sciencemag.org/content/336/6086/1287.full.pdf},
  owner     = {NAG},
  publisher = {American Association for the Advancement of Science},
  timestamp = {2019.02.07},
  url       = {http://science.sciencemag.org/content/336/6086/1287},
}

@Article{Porras2005,
  author    = {Miguel A. Porras and Audrius Dubietis and Ernestas Ku\v{c}inskas and Francesca Bragheri and Vittorio Degiorgio and Arnaud Couairon and Daniele Faccio and Paolo Di Trapani},
  title     = {From {X}- to {O}-shaped spatiotemporal spectra of light filaments in water},
  journal   = {Opt. Lett.},
  year      = {2005},
  volume    = {30},
  pages     = {3398--3400},
  month     = {Dec},
  abstract  = {We show that the angle--wavelength spectra of light filaments excited by ultrashort pulses experience a transition from X- to O-like structures when their carrier wavelengths are switched from normal to anomalous dispersion. Calculations confirm that the O-shaped conical emission follows the elliptic geometry of the nonlinear Schr\"{o}dinger equation with anomalous dispersion.},
  doi       = {10.1364/OL.30.003398},
  keywords  = {Pulse propagation and temporal solitons ; Ultrafast nonlinear optics; Light filaments; Nonlinear effects; Phase matching; Raman scattering; Refractive index; Spatial filtering},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-30-24-3398},
}

@Article{Porras2007,
  author    = {Miguel A. Porras and Audrius Dubietis and Aidas Matijo\v{s}ius and Rimtautas Piskarskas and Francesca Bragheri and Alessandro Averchi and Paolo Di Trapani},
  title     = {Characterization of conical emission of light filaments in media with anomalous dispersion},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2007},
  volume    = {24},
  pages     = {581--584},
  month     = {Mar},
  abstract  = {Conical emission featuring a diminishing emission angle with increasing wavelength detuning is observed in ultrashort light filaments in fused silica at a carrier wavelength with anomalous dispersion. In the measured angularly resolved spectrum of the filament, this conical emission appears as an elliptical, or O-like, structure that fits quantitatively to the elliptical spectrum of gain in the Kerr-driven spatiotemporal instability of nonlinear plane waves.},
  doi       = {10.1364/JOSAB.24.000581},
  keywords  = {Nonlinear optics, transverse effects in; Pulse propagation and temporal solitons ; Self-action effects; Ultrafast nonlinear optics; Fused silica; Light filaments; Parametric processes; Phase matching; Raman scattering; Self phase modulation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-24-3-581},
}

@Article{Potemkin2018,
  author    = {Potemkin, F. V. and Mareev, E. I. and Smetanina, E. O.},
  title     = {Influence of wave-front curvature on supercontinuum energy during filamentation of femtosecond laser pulses in water},
  journal   = {Phys. Rev. A},
  year      = {2018},
  volume    = {97},
  pages     = {033801},
  month     = {Mar},
  doi       = {10.1103/PhysRevA.97.033801},
  issue     = {3},
  numpages  = {7},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.18},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.97.033801},
}

@Article{Reid1997,
  author    = {D. T. Reid and Z. Penman and M. Ebrahimzadeh and W. Sibbett and H. Karlsson and F. Laurell},
  title     = {Broadly tunable infrared femtosecond optical parametric oscillator based on periodically poled RbTiOAsO4},
  journal   = {Opt. Lett.},
  year      = {1997},
  volume    = {22},
  pages     = {1397--1399},
  month     = {Sep},
  abstract  = {We present results from what we believe is the first reported example of an optical parametric oscillator based on periodically poled RbTiOAsO4. The oscillator is pumped by a femtosecond self-mode-locked Ti:sapphire laser and, with a single-grating 2-mm-long crystal and one mirror set, a combination of pump and cavity-length tuning provided wavelength coverage from 1060 to 1225вЂ‰вЂ‰nm (signal) and 2.67 to 4.5В {\textmu}m (idler). Average output powers were as much as 120вЂ‰вЂ‰mW in the signal and 105вЂ‰вЂ‰mW in the idler and interferometric autocorrelations recorded at signal and idler wavelengths of 1.1 and 3.26В {\textmu}m, respectively, imply pulse durations of 125 and 115вЂ‰вЂ‰fs, respectively.},
  doi       = {10.1364/OL.22.001397},
  keywords  = {Antireflection coatings; Parametric oscillators; Periodically poled lithium niobate; Phase matching; Second harmonic generation; Ti:sapphire lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.18},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-22-18-1397},
}

@Article{Roppo2007,
  Title                    = {Role of phase matching in pulsed second-harmonic generation: Walk-off and phase-locked twin pulses in negative-index media},
  Author                   = {Roppo, Vito and Centini, Marco and Sibilia, Concita and Bertolotti, Mario and de Ceglia, Domenico and Scalora, Michael and Akozbek, Neset and Bloemer, Mark J. and Haus, Joseph W. and Kosareva, Olga G. and Kandidov, Valery P.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2007},

  Month                    = {Sep},
  Pages                    = {033829},
  Volume                   = {76},

  Doi                      = {10.1103/PhysRevA.76.033829},
  Issue                    = {3},
  Numpages                 = {12},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.76.033829}
}

@Article{Saliminia2005,
  author    = {A. Saliminia and S. L. Chin and R. Vall\'{e}e},
  title     = {Ultra-broad and coherent white light generation in silica glass by focused femtosecond pulses at 1.5~\si{\micro\metre}},
  journal   = {Opt. Express},
  year      = {2005},
  volume    = {13},
  pages     = {5731--5738},
  month     = {Jul},
  abstract  = {We report on the observation of efficient and ultra-broadband white light super-continuum generated by focusing femtosecond pulses from an optical parametric amplifier at 1.5 $\mu$m in silica glass. The characteristic white light spectrum is extending from 400 nm up to at least 1750 nm. At sufficiently high input powers stable white light patterns associated with the interference of spatially coherent filamentary sources were observed and analyzed. Unlike focusing with 800 nm pulses from a Ti-sapphire laser, the stable fringes formed for each spectral component were pronounced owing to significantly reduced destructive impact of optical breakdown on filamentation of femtosecond pulses at 1.5 $\mu$m. By taking advantage of this property, the formation of optical waveguides in silica glass with considerably broader range of writing parameters as compared to those fabricated with 800 nm pulses, was demonstrated.},
  doi       = {10.1364/OPEX.13.005731},
  keywords  = {Silica; Femtosecond pulses; Fringe analysis; Scanning electron microscopy; Stimulated Raman scattering; Third harmonic generation; White light},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-13-15-5731},
}

@Article{Schrauth2011,
  author    = {Samuel E. Schrauth and Bonggu Shim and Aaron D. Slepkov and Luat T. Vuong and Alexander L. Gaeta and Nir Gavish and Gadi Fibich},
  title     = {Pulse splitting in the anomalous group-velocity-dispersion regime},
  journal   = {Opt. Express},
  year      = {2011},
  volume    = {19},
  pages     = {9309--9314},
  month     = {May},
  abstract  = {We investigate experimentally the role that the initial temporal profile of ultrashort laser pulses has on the self-focusing dynamics in the anomalous group-velocity dispersion (GVD) regime. We observe that pulse-splitting occurs for super-Gaussian pulses, but not for Gaussian pulses. The splitting does not occur for either pulse shape when the GVD is near-zero. These observations agree with predictions based on the nonlinear Schr\"{o}dinger equation, and can be understood intuitively using the method of nonlinear geometrical optics.},
  doi       = {10.1364/OE.19.009309},
  keywords  = {Kerr effect; Pulse propagation and temporal solitons ; Self-action effects; Ultrafast nonlinear optics; Fused silica; Harmonic generation; Pulse propagation; Refractive index; Self phase modulation; Ultrashort pulses},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-10-9309},
}

@Article{Schulz2011,
  author    = {Emilia Schulz and Daniel S. Steingrube and Tobias Vockerodt and Thomas Binhammer and Uwe Morgner and Milutin Kova\v{c}ev},
  title     = {Gradient enhanced third harmonic generation in a femtosecond filament},
  journal   = {Opt. Lett.},
  year      = {2011},
  volume    = {36},
  pages     = {4389--4391},
  month     = {Nov},
  abstract  = {The third harmonic generated during femtosecond filamentation in air is studied. By establishing a gradient from atmospheric pressure to vacuum conditions, we truncate the filament abruptly at defined positions. The introduction of the pressure gradient leads to an enhancement of the generated third harmonic radiation by 3 orders of magnitude. This effect is attributed to an improved on-axis phase-matching condition. We investigate the spectral shape and the conversion efficiency of the third harmonic during the propagation in the filament.},
  doi       = {10.1364/OL.36.004389},
  keywords  = {Multiphoton processes; Nonlinear optics; Multiharmonic generation; Ultrafast optics; Pulse compression; Supercontinuum generation; High harmonic generation; Nonlinear effects; Phase matching; Refractive index; Third harmonic generation; Ultraviolet radiation},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-36-22-4389},
}

@Article{Shumakova2016,
  author    = {Shumakova, V. and Malevich, P. and Ali\v{s}auskas, S. and Voronin, A. and Zheltikov, A. M. and Faccio, D. and Kartashov, D. and Baltu\v{s}ka, A. and Pug\v{z}lys, A.},
  title     = {Multi-millijoule few-cycle mid-infrared pulses through nonlinear self-compression in bulk},
  journal   = {Nat. Commun.},
  year      = {2016},
  volume    = {7},
  pages     = {12877},
  month     = sep,
  owner     = {NAG},
  publisher = {The Author(s)},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1038/ncomms12877},
}

@Article{Silva2012,
  author    = {Silva, F. and Austin, D.R. and Thai, A. and Baudisch, M. and Hemmer, M. and Faccio, D. and Couairon, A. and Biegert, J.},
  title     = {Multi-octave supercontinuum generation from mid-infrared filamentation in a bulk crystal},
  journal   = {Nat. Commun.},
  year      = {2012},
  volume    = {3},
  pages     = {807},
  month     = may,
  owner     = {NAG},
  publisher = {The Author(s)},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1038/ncomms1816},
}

@Article{Smetanina2013,
  author    = {E. O. Smetanina and V. O. Kompanets and S. V. Chekalin and A. E. Dormidonov and V. P. Kandidov},
  title     = {Anti-Stokes wing of femtosecond laser filament supercontinuum in fused silica},
  journal   = {Opt. Lett.},
  year      = {2013},
  volume    = {38},
  pages     = {16--18},
  month     = {Jan},
  abstract  = {We have demonstrated that in the IR pulse filament the anomalous dispersion of fused silica leads to the formation of an isolated anti-Stokes wing (ASW), which is located in the visible region of the supercontinuum (SC). It is shown that the isolated ASW is formed by the interference of the light field of a SC undergoing anomalous group velocity dispersion.},
  doi       = {10.1364/OL.38.000016},
  keywords  = {Kerr effect; Self-action effects; Condensed matter; Destructive interference; Femtosecond pulses; Fused silica; Laser beams; Light fields},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-38-1-16},
}

@Article{Smetanina2013b,
  author    = {E O Smetanina and V O Kompanets and A E Dormidonov and S V Chekalin and V P Kandidov},
  title     = {Light bullets from near-{IR} filament in fused silica},
  journal   = {Laser Phys. Lett.},
  year      = {2013},
  volume    = {10},
  pages     = {105401},
  month     = {aug},
  annote    = {The formation of light bullets during femtosecond laser pulse filamentation in the presence of anomalous group velocity dispersion has been recorded for the first time. The minimum experimentally detected width of the light bullet autocorrelation function is 27В fs, which corresponds to a duration of about 13.5В fs. The duration of the light bullet at a wavelength of 1800В nm is about two periods of the light field oscillation. The numerically calculated width of the autocorrelation function for such a light bullet is 23В fs, which is in good agreement with the experimental value.},
  doi       = {10.1088/1612-2011/10/10/105401},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1088%2F1612-2011%2F10%2F10%2F105401},
}

@Article{Stepanov2016,
  Title                    = {Solid-State Source of Subcycle Pulses in the Midinfrared},
  Author                   = {Stepanov, E. A. and Lanin, A. A. and Voronin, A. A. and Fedotov, A. B. and Zheltikov, A. M.},
  Journal                  = {Phys. Rev. Lett.},
  Year                     = {2016},

  Month                    = {Jul},
  Pages                    = {043901},
  Volume                   = {117},

  Doi                      = {10.1103/PhysRevLett.117.043901},
  Issue                    = {4},
  Numpages                 = {5},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.18},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevLett.117.043901}
}

@Article{Suntsov2010,
  Title                    = {Filamentation-induced third-harmonic generation in air via plasma-enhanced third-order susceptibility},
  Author                   = {Suntsov, S. and Abdollahpour, D. and Papazoglou, D. G. and Tzortzakis, S.},
  Journal                  = {Phys. Rev. A},
  Year                     = {2010},

  Month                    = {Mar},
  Pages                    = {033817},
  Volume                   = {81},

  Doi                      = {10.1103/PhysRevA.81.033817},
  Issue                    = {3},
  Numpages                 = {4},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.07},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.81.033817}
}

@Article{Suntsov2009,
  author    = {S. Suntsov and D. Abdollahpour and D. G. Papazoglou and S. Tzortzakis},
  title     = {Efficient third-harmonic generation through tailored IR femtosecond laser pulse filamentation in air},
  journal   = {Opt. Express},
  year      = {2009},
  volume    = {17},
  pages     = {3190--3195},
  month     = {Mar},
  abstract  = {The process of third-harmonic generation during the filamentation of intense IR femtosecond laser pulses in air is investigated experimentally. It is shown that the introduction of a thin plasma string created by another femtosecond pulse, perpendicularly to the filament's path, dramatically reshapes the third-harmonic beam into a Bessel-like far-field distribution, while at the same time significantly enhances, up to 250 times, its conversion efficiency.},
  doi       = {10.1364/OE.17.003190},
  keywords  = {Harmonic generation and mixing ; Self-action effects; Femtosecond phenomena; Ultrafast nonlinear optics; Femtosecond pulses; Infrared radiation; Laser beams; Nonlinear wave mixing; Strong field physics; Ultrafast lasers},
  owner     = {NAG},
  publisher = {OSA},
  timestamp = {2019.02.07},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-17-5-3190},
}

@Article{Theberge2005,
  author    = {Th{\'e}berge, F. and Liu, W. and Luo, Q. and Chin, S.L.},
  title     = {Ultrabroadband continuum generated in air (down to 230В nm) using ultrashort and intense laser pulses},
  journal   = {Appl. Phys. B},
  year      = {2005},
  volume    = {80},
  pages     = {221--225},
  month     = {Feb},
  issn      = {1432-0649},
  abstract  = {We present results on supercontinuum generation extended up to 230В nm in air during the propagation of a powerful femtosecond laser pulse. The broad supercontinuum generated in air is contributed by self-phase modulation and self-steepening of the fundamental laser pulse, the third-harmonic pulse and their interaction. In particular, the strong interaction between the fundamental and the third-harmonic pulses leads to broad and efficient continuum generation of the third-harmonic pulse itself. The spectrum of the third-harmonic generated in air extends over several tens of nm and overlaps with the shorter wavelength extent of the fundamental continuum. },
  day       = {01},
  doi       = {10.1007/s00340-004-1689-x},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = {https://doi.org/10.1007/s00340-004-1689-x},
}

@Article{Valiulis2011,
  author    = {G. Valiulis and V. Jukna and O. Jedrkiewicz and M. Clerici and E. Rubino and P. DiTrapani},
  title     = {Propagation dynamics and {X}-pulse formation in phase-mismatched second-harmonic generation},
  journal   = {Phys. Rev. A},
  year      = {2011},
  volume    = {83},
  month     = {April},
  abstract  = {This paper concerns the theoretical, numerical, and experimental study of the second-harmonic-generation (SHG) process under conditions of phase and group-velocity mismatch and aims to demonstrate the dimensionality transition of the SHG process caused by the change of the fundamental wave diameter. We show that SHG from a narrow fundamental beam leads to the spontaneous self-phase-matching process with, in addition, the appearance of angular dispersion for the off-axis frequency components generated. The angular dispersion sustains the formation of the short X pulse in the second harmonic (SH) and is recognized as three-dimensional (3D) dynamics. On the contrary, the large-diameter fundamental beam reduces the number of the degrees of freedom, does not allow the generation of the angular dispersion, and maintains the so-called one-dimensional (1D) SHG dynamics, where the self-phase-matching appears just for axial components and is accompanied by the shrinking of the SH temporal bandwidth, and sustains a long SH pulse formation. The transition from long SH pulse generation typical of the 1D dynamics to the short 3D X pulse is illustrated numerically and experimentally by changing the conditions from the self-defocusing to the self-focusing regime by simply tuning the phase mismatch. The numerical and experimental verification of the analytical results are also presented.},
  doi       = {10.1103/PhysRevA.83.043834},
  owner     = {NAG},
  publisher = {American Physical Society},
  timestamp = {2019.02.07},
  url       = {http://eprints.gla.ac.uk/111928/},
}

@Article{Vasa2014,
  Title                    = {Supercontinuum generation in water by intense, femtosecond laser pulses under anomalous chromatic dispersion},
  Author                   = {Vasa, Parinda and Dharmadhikari, Jayashree A. and Dharmadhikari, Aditya K. and Sharma, Rahul and Singh, Mamraj and Mathur, Deepak},
  Journal                  = {Phys. Rev. A},
  Year                     = {2014},

  Month                    = {Apr},
  Pages                    = {043834},
  Volume                   = {89},

  Doi                      = {10.1103/PhysRevA.89.043834},
  Issue                    = {4},
  Numpages                 = {6},
  Owner                    = {NAG},
  Publisher                = {American Physical Society},
  Timestamp                = {2019.02.18},
  Url                      = {https://link.aps.org/doi/10.1103/PhysRevA.89.043834}
}

@Article{Vicario2015,
  author    = {C Vicario and B Monoszlai and G Arisholm and C P Hauri},
  title     = {Generation of 1.5-octave intense infrared pulses by nonlinear interactions in {DAST} crystal},
  journal   = {J. Opt.},
  year      = {2015},
  volume    = {17},
  pages     = {094005},
  month     = {sep},
  annote    = {Infrared pulses with large spectral width extending from 1.2 to 3.4 Ојm are generated in the organic crystal DAST (4-N, N-dimethylamino-4вЂІ-NвЂІ-methylstilbazolium tosylate). The input pulse has a central wavelength of 1.5 Ојm and 65 fs duration. With 2.8 mJ input energy we obtained up to 700 ОјJ in the broadened spectrum. The output can be easily scaled up in energy by increasing the crystal size together with the energy and the beam size of the pump. The ultra-broad spectrum is ascribed to cascaded second order processes mediated by the exceptionally large effective П‡ 2 nonlinearity of DAST, but the shape of the spectrum indicates that a delayed П‡ 3 process may also be involved. Numerical simulations reproduce the experimental results qualitatively and provide an insight in the mechanisms underlying the asymmetric spectral broadening.},
  doi       = {10.1088/2040-8978/17/9/094005},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F2040-8978%2F17%2F9%2F094005},
}

@Article{Vozzi2012,
  author    = {Caterina Vozzi and Matteo Negro and Salvatore Stagira},
  title     = {Strong-field phenomena driven by mid-infrared ultrafast sources},
  journal   = {J. Mod. Opt.},
  year      = {2012},
  volume    = {59},
  pages     = {1283--1302},
  doi       = {10.1080/09500340.2012.713128},
  eprint    = {https://doi.org/10.1080/09500340.2012.713128},
  owner     = {NAG},
  publisher = {Taylor \& Francis},
  timestamp = {2019.02.07},
  url       = { 
 https://doi.org/10.1080/09500340.2012.713128
 
},
}

@Book{Weber2003,
  title     = {Handbook of Optical Materials},
  publisher = {CRC Press},
  year      = {2003},
  author    = {Marvin J. Weber},
  address   = {NY},
  owner     = {NAG},
  timestamp = {2019.02.07},
}

@Article{Yang2009,
  author    = {Yang,Xuan and Wu,Jian and Peng,Yan and Tong,Yuqi and Yuan,Shuai and Ding,Liangen and Xu,Zhizhan and Zeng,Heping},
  title     = {Noncollinear interaction of femtosecond filaments with enhanced third harmonic generation in air},
  journal   = {Appl. Phys. Lett.},
  year      = {2009},
  volume    = {95},
  pages     = {111103},
  doi       = {10.1063/1.3227658},
  eprint    = {https://doi.org/10.1063/1.3227658},
  owner     = {NAG},
  timestamp = {2019.02.07},
  url       = { 
 https://doi.org/10.1063/1.3227658
 
},
}

@Article{Zurl1998,
  author    = {Z{\"u}rl, R. and Graener, H.},
  title     = {High-harmonic generation of mid-{IR} pulses in simple liquids},
  journal   = {Appl. Phys. B},
  year      = {1998},
  volume    = {66},
  pages     = {213--216},
  month     = {Feb},
  issn      = {1432-0649},
  abstract  = {as expected. The analysis of the frequency dependence indicates the strong influence of vibrational resonances, which were found here for the first time. Near the fundamental resonance the jth harmonic generation has to be described as aВ (j+3) wave mixing experiment due to the necessary inclusion of the population of the corresponding vibrational state.},
  day       = {01},
  doi       = {10.1007/s003400050378},
  owner     = {NAG},
  timestamp = {2019.02.08},
  url       = {https://doi.org/10.1007/s003400050378},
}

@Article{Zhang2016,
  author    = {Lanzhi Zhang and Tingting Xi and Zuoqiang Hao and Jinquan Lin},
  title     = {Supercontinuum accumulation along a single femtosecond filament in fused silica},
  journal   = {J. Phys. D: Appl. Phys.},
  year      = {2016},
  volume    = {49},
  pages     = {115201},
  month     = {feb},
  annote    = {The spectral evolution of a filament formed by femtosecond laser pulses in fused silica is experimentally investigated. It is found that the evolution of the supercontinuum (SC) spectrum along the single filament is closely related with its intensity and length. The energy conversion efficiency of fundamental laser pulse to SC generation increases monotonically with different rates as the filament length increases, showing an accumulating effect along the filament. The results also show that the short-wavelength cutoff of the SC spectra is more sensitive to the intensity of the filament than the conversion efficiency of the SC, which is contributed mainly by the efficiently ionized zone of the filament.},
  doi       = {10.1088/0022-3727/49/11/115201},
  owner     = {NAG},
  publisher = {{IOP} Publishing},
  timestamp = {2019.02.18},
  url       = {https://doi.org/10.1088%2F0022-3727%2F49%2F11%2F115201},
}

@Book{SCLS_book_alfano_2006,
  Title                    = {The Supercontinuum Laser Source},
  Editor                   = {R. R. Alfano},
  Publisher                = {Springer NY},
  Year                     = {2006},
  Edition                  = {2nd},

  Owner                    = {NAG},
  Timestamp                = {2019.02.07}
}

@Article{Skupin2006,
  author   = {S. Skupin and L. Bergé},
  title    = {Self-guiding of femtosecond light pulses in condensed media: Plasma generation versus chromatic dispersion},
  journal  = {Physica D},
  year     = {2006},
  volume   = {220},
  pages    = {14--30},
  issn     = {0167-2789},
  abstract = {We investigate the nonlinear self-guiding of ultrashort laser pulses in dielectric solids, such as fused silica. Emphasis is given to the role of chromatic dispersion compared with plasma generation. A basic set of propagation equations is derived analytically and provides a nonlinear Schrödinger model accounting for high-order dispersion, space–time focusing, self-steepening and plasma generation. Three typical propagation regimes at the laser wavelengths of 790 nm, 1550 nm and 1275 nm, respectively promoting normal, anomalous and near-zero group velocity dispersions (GVD), are examined by means of theoretical arguments and numerical simulations. It is shown that normal GVD may favor a significant self-guiding with inessential plasma generation, which does not occur in anomalous GVD regimes. Spectral broadening at these three laser wavelengths is commented on, in the light of the temporal distortions undergone by the pulses.},
  doi      = {https://doi.org/10.1016/j.physd.2006.06.006},
  keywords = {Nonlinear Schrödinger equations, Optical self-focusing, Ultrashort pulse propagation, Nonlinear dispersive waves},
  url      = {http://www.sciencedirect.com/science/article/pii/S0167278906002181},
}

@Article{Faccio2008a,
  author    = {Faccio, Daniele and Clerici, Matteo and Averchi, Alessandro and Lotti, Antonio and Jedrkiewicz, Ottavia and Dubietis, Audrius and Tamosauskas, Gintaras and Couairon, Arnaud and Bragheri, Francesca and Papazoglou, Dimitris and Tzortzakis, Stelios and Di Trapani, Paolo},
  title     = {Few-cycle laser-pulse collapse in {K}err media: The role of group-velocity dispersion and $\mathsf{X}$-wave formation},
  journal   = {Phys. Rev. A},
  year      = {2008},
  volume    = {78},
  pages     = {033826},
  month     = {Sep},
  doi       = {10.1103/PhysRevA.78.033826},
  issue     = {3},
  numpages  = {7},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.78.033826},
}

@Article{Ranka1996,
  author    = {Ranka, Jinendra K. and Schirmer, Robert W. and Gaeta, Alexander L.},
  title     = {Observation of Pulse Splitting in Nonlinear Dispersive Media},
  journal   = {Phys. Rev. Lett.},
  year      = {1996},
  volume    = {77},
  pages     = {3783--3786},
  month     = {Oct},
  doi       = {10.1103/PhysRevLett.77.3783},
  issue     = {18},
  numpages  = {0},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.77.3783},
}

@InBook{Gaeta2009,
  pages     = {399--411},
  title     = {Spatial and Temporal Dynamics of Collapsing Ultrashort Laser Pulses},
  publisher = {Springer New York},
  year      = {2009},
  author    = {Gaeta, Alexander L.},
  editor    = {Boyd, Robert W. and Lukishova, Svetlana G. and Shen, Y.R.},
  address   = {New York, NY},
  isbn      = {978-0-387-34727-1},
  abstract  = {In nonlinear optics, a wave collapse manifests itself as the self-focusing of light. There exist a number of universal features associated with wave collapse, such as self-similar evolution, pulse splitting, filamentation, and shock formation, in which nonlinear optics has offered an unparalleled opportunity for study and comparison of theory with experiment. This chapter reviews recent theoretical and experimental work in which such phenomena have been observed.},
  booktitle = {Self-focusing: Past and Present: Fundamentals and Prospects},
  doi       = {10.1007/978-0-387-34727-1_16},
  url       = {https://doi.org/10.1007/978-0-387-34727-1_16},
}

@Article{Silberberg1990,
  author    = {Yaron Silberberg},
  title     = {Collapse of optical pulses},
  journal   = {Opt. Lett.},
  year      = {1990},
  volume    = {15},
  pages     = {1282--1284},
  month     = {Nov},
  abstract  = {Under the combined effect of diffraction, anomalous dispersion, and nonlinear refraction, an optical pulse can collapse simultaneously in time and space. Such a collapse could yield short pulses with extremely large optical fields. Light bullets---pulses that propagate without change in space or time---are also possible. The condition for such a collapse and possible experiments are discussed.},
  doi       = {10.1364/OL.15.001282},
  keywords  = {First order optics; Nonlinear effects; Optical fields; Ray trajectory; Spatial solitons; Temporal solitons},
  publisher = {OSA},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-15-22-1282},
}

@Proceeding{rohtua,
  author = {Dumitru Mihalache},
  title  = {Linear and nonlinear light bullets: recent developments},
  year   = {2013},
  doi    = {10.1117/12.2032565},
  url    = {https://doi.org/10.1117/12.2032565},
  volume = {8882},
}

@Article{article,
  author  = {Mihalache, D},
  title   = {Linear and nonlinear light bullets: Recent theoretical and experimental studies},
  journal = {Romanian Reports of Physics},
  year    = {2012},
  volume  = {57},
  pages   = {352--371},
  month   = {01},
}

@Article{Malomed2005,
  author    = {Boris A Malomed and Dumitru Mihalache and Frank Wise and Lluis Torner},
  title     = {Spatiotemporal optical solitons},
  journal   = {J. Opt. B: Quantum Semiclassical Opt.},
  year      = {2005},
  volume    = {7},
  pages     = {R53--R72},
  month     = {apr},
  abstract  = {In the course of the past several years, a new level of understanding has been achieved
about conditions for the existence, stability, and generation of spatiotemporal optical
solitons, which are nondiffracting and nondispersing wavepackets propagating in nonlinear
optical media. Experimentally, effectively two-dimensional (2D) spatiotemporal solitons
that overcome diffraction in one transverse spatial dimension have been created in
quadratic nonlinear media. With regard to the theory, fundamentally new features of light
pulses that self-trap in one or two transverse spatial dimensions and do not spread out in
time, when propagating in various optical media, were thoroughly investigated in models
with various nonlinearities. Stable vorticity-carrying spatiotemporal solitons have been
predicted too, in media with competing nonlinearities (quadratic–cubic or cubic–quintic).
This article offers an up-to-date survey of experimental and theoretical results in this field.
Both achievements and outstanding difficulties are reviewed, and open problems are
highlighted. Also briefly described are recent predictions for stable 2D and 3D solitons in
Bose–Einstein condensates supported by full or low-dimensional optical lattices.},
  doi       = {10.1088/1464-4266/7/5/r02},
  publisher = {{IOP} Publishing},
  url       = {https://doi.org/10.1088%2F1464-4266%2F7%2F5%2Fr02},
}

@Article{Frantzeskakis2014,
  author  = {Frantzeskakis, D and Leblond, Hervé and Mihalache, D},
  title   = {Nonlinear Optics of Intense Few-Cycle Pulses: An Overview of Recent Theoretical and Experimental Developments},
  journal = {Rom. J. Phys.},
  year    = {2014},
  volume  = {59},
  pages   = {767--784},
  month   = {01},
}

@Article{Berge2005,
  author    = {Berg\'e, L. and Skupin, S.},
  title     = {Self-channeling of ultrashort laser pulses in materials with anomalous dispersion},
  journal   = {Phys. Rev. E},
  year      = {2005},
  volume    = {71},
  pages     = {065601},
  month     = {Jun},
  doi       = {10.1103/PhysRevE.71.065601},
  issue     = {6},
  numpages  = {4},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevE.71.065601},
}

@Article{Grazuleviciute2014,
  author    = {I. Gra\v{z}ulevi\v{c}i\={u}t\.{e} and G. Tamo\v{s}auskas and V. Jukna and A. Couairon and D. Faccio and A. Dubietis},
  title     = {Self-reconstructing spatiotemporal light bullets},
  journal   = {Opt. Express},
  year      = {2014},
  volume    = {22},
  pages     = {30613--30622},
  month     = {Dec},
  abstract  = {We show that spatiotemporal light bullets generated by self-focusing and filamentation of 100 fs, 1.8 $\mu$m pulses in a dielectric medium with anomalous group velocity dispersion (sapphire) are extremely robust to external perturbations. We present the experimental results supported by the numerical simulations that demonstrate complete spatiotemporal self-reconstruction of the light bullet after hitting an obstacle, which blocks its intense core carrying the self-compressed pulse, in nonlinear as well as in linear (free-space) propagation regimes.},
  doi       = {10.1364/OE.22.030613},
  keywords  = {Self-action effects; Self-focusing; Pulse compression; Ultrafast nonlinear optics; Femtosecond pulses; Laser beams; Light filaments; Numerical simulation; Self phase modulation; Ti:sapphire lasers},
  publisher = {OSA},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-22-25-30613},
}

@InBook{Couairon2016,
  pages     = {147--165},
  title     = {Filamentation and Pulse Self-compression in the Anomalous Dispersion Region of Glasses},
  publisher = {Springer International Publishing},
  year      = {2016},
  author    = {Couairon, A. and Jukna, V. and Darginavi{\v{c}}ius, J. and Majus, D. and Garejev, N. and Gra{\v{z}}ulevi{\v{c}}i{\={u}}t{\.{e}}, I. and Valiulis, G. and Tamo{\v{s}}auskas, G. and Dubietis, A. and Silva, F. and Austin, D. R. and Hemmer, M. and Baudisch, M. and Thai, A. and Biegert, J. and Faccio, D. and Jarnac, A. and Houard, A. and Liu, Y. and Mysyrowicz, A. and Grabielle, S. and Forget, N. and Dur{\'e}cu, A. and Durand, M. and Lim, K. and McKee, E. and Baudelet, M. and Richardson, M.},
  editor    = {Bandrauk, Andre D. and Lorin, Emmanuel and Moloney, Jerome V.},
  address   = {Cham},
  isbn      = {978-3-319-23084-9},
  abstract  = {The propagation of near-infrared ultra-short laser pulses in the regime of anomalous dispersion of transparent solids is associated with a host of self-induced effects including a significant spectral broadening extending from the ultraviolet into the infrared region, pulse self-compression down to few-cycle pulse durations, free and driven third harmonic generation, conical emission and the formation of stable filaments over several cm{\$}{\$}{\backslash}mathop{\{}{\backslash}mathrm{\{}cm{\}}{\}}{\backslash}nolimits{\$}{\$}showing the emergence of conical light bullets. We review measurements performed in different experimental conditions and results of numerical simulations of unidirectional propagation models showing that the interpretation of all these phenomena proceeds from the formation of non-spreading conical light bullets during filamentation.},
  booktitle = {Laser Filamentation: Mathematical Methods and Models},
  doi       = {10.1007/978-3-319-23084-9_6},
  url       = {https://doi.org/10.1007/978-3-319-23084-9_6},
}

@Article{Bravy2015,
  author   = {B.G. Bravy and V.M. Gordienko and V.T. Platonenko},
  title    = {{K}err effect-assisted self-compression in dielectric to single-cycle pulse width and to terawatt power level in mid-IR},
  journal  = {Opt. Commun.},
  year     = {2015},
  volume   = {344},
  pages    = {7--11},
  issn     = {0030-4018},
  abstract = {The self-compression of sub-TW mid-IR (λ=4–5µm) femtosecond laser pulse in a non-linear dielectric medium was numerically modeled. Combination of the Kerr non-linearity and negative group velocity dispersion in CaF2 crystal was found to result in compression of the incident laser pulse to a 1–2-cycle pulse width. The possibility for suppression of small-scale self-focusing in conditions when the pulse power was several orders of magnitude above the critical self-focusing power was analyzed. Intrinsic concentration of free carriers was found to play important role in pulse evolution during its propagation.},
  doi      = {https://doi.org/10.1016/j.optcom.2015.01.036},
  keywords = {CaF crystal, Few-cycle pulse, Self-compression, Mid-IR range},
  url      = {http://www.sciencedirect.com/science/article/pii/S0030401815000486},
}

@Article{Porras2005b,
  author    = {Miguel A. Porras and Alberto Parola and Paolo Di Trapani},
  title     = {Nonlinear unbalanced {O} waves: nonsolitary, conical light bullets in nonlinear dissipative media},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2005},
  volume    = {22},
  pages     = {1406--1413},
  month     = {Jul},
  abstract  = {Nonlinear unbalanced O waves are localized wave packets that propagate without transversal diffraction broadening and temporal dispersion spreading in nonlinear media with anomalous dispersion. The conical nature of these nonsolitary light bullets allows for an energy refilling mechanism of the nonlinear central core of the wave that renders stationary propagation robust against nonlinear losses.},
  doi       = {10.1364/JOSAB.22.001406},
  keywords  = {Nonlinear optics, transverse effects in; Pulse propagation and temporal solitons ; Kerr media; Nonlinear optics; Phase shift; Refractive index; Spatial frequency; Wave propagation},
  publisher = {OSA},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-22-7-1406},
}

@Article{Dubietis2004,
  author    = {Dubietis, Audrius and Gai\ifmmode \check{z}\else \v{z}\fi{}auskas, Eugenijus and Tamo\ifmmode \check{s}\else \v{s}\fi{}auskas, Gintaras and Di Trapani, Paolo},
  title     = {Light Filaments without Self-Channeling},
  journal   = {Phys. Rev. Lett.},
  year      = {2004},
  volume    = {92},
  pages     = {253903},
  month     = {Jun},
  doi       = {10.1103/PhysRevLett.92.253903},
  issue     = {25},
  numpages  = {4},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.92.253903},
}

@Article{Bates2010,
  author    = {P. K. Bates and O. Chalus and J. Biegert},
  title     = {Ultrashort pulse characterization in the mid-infrared},
  journal   = {Opt. Lett.},
  year      = {2010},
  volume    = {35},
  pages     = {1377--1379},
  month     = {May},
  abstract  = {We describe a second-harmonic-generation frequency-resolved optical gating measurement device optimized for the characterization of few-cycle pulses in the mid-IR spectral range. The system has a temporal range of 100 ps with resolution of 0.12 fs, and it is capable of measuring pulses as short as 1.5 cycles (15  fs) at 3 $\mu$m. Through interchangeable beam splitters and detectors it covers a wavelength range from 800 nmto5 $\mu$m with up to 0.5 cm{\textminus}1 resolution. We demonstrate measurement of a richly featured 3.2 $\mu$m pulse with 9.6⁢ cycle duration, recovering the main pulse of 96 fs, as well as low-intensity post-pulses with picosecond offset. We also characterize a 100 fs pulse after dispersion through a 1 cm sapphire plate, comparing the measured phase difference with the calculated one.},
  doi       = {10.1364/OL.35.001377},
  keywords  = {Nonlinear optics, devices; Nonlinear optical devices; Ultrafast measurements; Free electron lasers; Oceanic optics; Phase conjugation; Phase matching; Spectral phase interferometry for direct field reconstruction; Ti:sapphire lasers},
  publisher = {OSA},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-35-9-1377},
}

@Article{Kolesik2004a,
  author    = {Kolesik, M. and Wright, E. M. and Moloney, J. V.},
  title     = {Dynamic Nonlinear X Waves for Femtosecond Pulse Propagation in Water},
  journal   = {Phys. Rev. Lett.},
  year      = {2004},
  volume    = {92},
  pages     = {253901},
  month     = {Jun},
  doi       = {10.1103/PhysRevLett.92.253901},
  issue     = {25},
  numpages  = {4},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevLett.92.253901},
}

@Article{Faccio2005,
  author    = {Faccio, D. and Matijosius, A. and Dubietis, A. and Piskarskas, R. and Varanavi\ifmmode \check{c}\else \v{c}\fi{}ius, A. and Gaizauskas, E. and Piskarskas, A. and Couairon, A. and Di Trapani, P.},
  title     = {Near- and far-field evolution of laser pulse filaments in {K}err media},
  journal   = {Phys. Rev. E},
  year      = {2005},
  volume    = {72},
  pages     = {037601},
  month     = {Sep},
  doi       = {10.1103/PhysRevE.72.037601},
  issue     = {3},
  numpages  = {4},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevE.72.037601},
}

@Article{Faccio:08,
  author    = {Daniele Faccio and Alessandro Averchi and Antonio Lotti and Paolo Di Trapani and Arnaud Couairon and Dimitris Papazoglou and Stelios Tzortzakis},
  title     = {Ultrashort laser pulse filamentation from spontaneous X Wave formation in air},
  journal   = {Opt. Express},
  year      = {2008},
  volume    = {16},
  pages     = {1565--1570},
  month     = {Feb},
  abstract  = {The description of ultrashort laser pulse filamentation in condensed media as a spontaneous formation of X waves is shown to apply also to filaments generated in air. Within this framework, a simple explanation is brought for several features of the filament such as the subdiffractive propagation and the energy flux from the weakly localized tails of the X-waves to the intense core.},
  doi       = {10.1364/OE.16.001565},
  keywords  = {Scattering, stimulated; Self-action effects; Femtosecond phenomena; Multiphoton ionization; Nonlinear effects; Numerical simulation; Phase matching; Terahertz generation; Ultraviolet lasers},
  publisher = {OSA},
  url       = {http://www.opticsexpress.org/abstract.cfm?URI=oe-16-3-1565},
}

@Article{FACCIO2006672,
  author   = {Daniele Faccio and Miguel Angel Porras and Audrius Dubietis and Gintaras Tamošauskas and Ernestas Kučinskas and Arnaud Couairon and Paolo Di Trapani},
  title    = {Angular and chromatic dispersion in {K}err-driven conical emission},
  journal  = {Opt. Commun.},
  year     = {2006},
  volume   = {265},
  pages    = {672--677},
  issn     = {0030-4018},
  abstract = {We report measurements of ultrashort optical pulse filamentation in Kerr media with normal dispersion. We measure the angular dispersion of spontaneously generated colored conical emission and show that for large frequency shifts from the input pump frequency, it is well described by a relation between angle and frequency with slope determined solely by material chromatic dispersion. This measurement is in agreement with recent models that interpret filamentation dynamics in terms of the spontaneous formation of nonlinear X-waves. Finally, experimental results of filamentation in air show, for the first time, that the interpretation of CE in terms of X-waves may be also extended to gaseous media.},
  doi      = {https://doi.org/10.1016/j.optcom.2006.04.062},
  url      = {http://www.sciencedirect.com/science/article/pii/S0030401806003774},
}

@Article{Oksenhendler2010,
  author   = {Oksenhendler, T. and Coudreau, S. and Forget, N. and Crozatier, V. and Grabielle, S. and Herzog, R. and Gobert, O. and Kaplan, D.},
  title    = {Self-referenced spectral interferometry},
  journal  = {Appl. Phys. B},
  year     = {2010},
  volume   = {99},
  pages    = {7--12},
  month    = {Apr},
  issn     = {1432-0649},
  abstract = {A new femtosecond pulse characterization, named self-referenced spectral interferometry, is introduced. Based on linear spectral interferometry, the reference pulse is self created from the pulse being characterized. This self reference results from pulse shaping optimization and non-linear temporal filtering.},
  day      = {01},
  doi      = {10.1007/s00340-010-3916-y},
  url      = {https://doi.org/10.1007/s00340-010-3916-y},
}

@Article{Lotti2010,
  author    = {Lotti, A. and Couairon, A. and Faccio, D. and Trapani, P. Di},
  title     = {Energy-flux characterization of conical and space-time coupled wave packets},
  journal   = {Phys. Rev. A},
  year      = {2010},
  volume    = {81},
  pages     = {023810},
  month     = {Feb},
  doi       = {10.1103/PhysRevA.81.023810},
  issue     = {2},
  numpages  = {14},
  publisher = {American Physical Society},
  url       = {https://link.aps.org/doi/10.1103/PhysRevA.81.023810},
}

@Article{Jukna2019,
  author    = {Vytautas Jukna and Nail Garejev and Gintaras Tamo\v{s}auskas and Audrius Dubietis},
  title     = {Role of external focusing geometry in supercontinuum generation in bulk solid-state media},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2019},
  volume    = {36},
  pages     = {A54--A60},
  month     = {Feb},
  abstract  = {We present a detailed experimental and numerical study of supercontinuum generation in sapphire crystal at the vicinity of its zero group velocity dispersion point (1.3\&\#x00A0;\&\#x03BC;m) when pumped by relatively long (210\&\#x00A0;fs) femtosecond pulses. We uncover very different evolutions of the spectral broadening versus the input pulse energy when the incident beam is focused either onto the input face or inside the 4-mm-thick sapphire sample. In particular, when the input beam was focused inside the crystal, we captured a surprising variation of the spectral width as a function of the input pulse energy, demonstrating supercontinuum generation, its suppression, and eventually, its recovery. The experimental findings were nicely reproduced by the numerical simulations, revealing a specific supercontinuum generation scenario, which relies on strong reshaping of the wave packet due to defocusing and absorption of free electron plasma, subsequent replenishment of the pulse on the propagation axis, and its splitting. We also demonstrate that this particular supercontinuum generation scenario takes place regardless of the external focusing geometry.},
  doi       = {10.1364/JOSAB.36.000A54},
  keywords  = {Femtosecond pulses; Picosecond pulses; Self phase modulation; Spectroscopy; Ultrafast nonlinear optics; Ultrashort pulses},
  publisher = {OSA},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-36-2-A54},
}

@Article{Marcinkeviciute2019,
  author    = {A. Marcinkevi\v{c}i\={u}t\.{e} and V. Jukna and R. \v{S}uminas and N. Garejev and G. Tamo\v{s}auskas and A. Dubietis},
  title     = {Femtosecond filamentation and supercontinuum generation in bulk silicon},
  journal   = {Opt. Lett.},
  year      = {2019},
  volume    = {44},
  pages     = {1343--1346},
  month     = {Mar},
  abstract  = {We experimentally study filamentation and supercontinuum generation in bulk silicon crystal using femtosecond mid-infrared pulses with carrier wavelengths in the range of 3.25\&\#x2013;4.7\&\#x00A0;\&\#x03BC;m, in the presence of three-, four-, and five-photon absorption. Spectral measurements show a fairly stable blueshifted cutoff in the 2.5\&\#x2013;2.7\&\#x00A0;\&\#x03BC;m range and gradual increase of the long-wave extent with increasing wavelength of the incident pulses, eventually yielding an octave-spanning supercontinuum, covering the wavelength range from 2.5 to 5.8\&\#x00A0;\&\#x03BC;m with the input pulses at 4.7\&\#x00A0;\&\#x03BC;m. The recorded spatiotemporal intensity distributions of a single filament revealed pulse splitting after the nonlinear focus, in line with the pulse-splitting-based filamentation scenario inherent to normally dispersive dielectric nonlinear media.},
  doi       = {10.1364/OL.44.001343},
  keywords  = {Femtosecond pulses; Parabolic mirrors; Phase matching; Refractive index; Self phase modulation; Sum frequency generation},
  publisher = {OSA},
  url       = {http://ol.osa.org/abstract.cfm?URI=ol-44-6-1343},
}

@Article{Marcinkeviciute2019b,
  author   = {A. Marcinkevičiūtė and V. Jukna and R. Šuminas and N. Garejev and G. Tamošauskas and A. Dubietis},
  title    = {Supercontinuum generation in the absence and in the presence of color centers in NaCl and KBr},
  journal  = {Results Phys.},
  year     = {2019},
  pages    = {102396},
  issn     = {2211-3797},
  abstract = {We study supercontinuum generation with femtosecond mid-infrared laser pulses in NaCl and KBr crystals when pumped at the vicinity of their zero group velocity dispersion points. Almost three octave-spanning SC spectra (covering the 0.7-5.4μm and 0.85-5.4μm ranges in 5 mm-thick NaCl and KBr samples, respectively) were produced by filamentation of 70 fs, 3.6μm input pulses in continuously translated samples. In the static setup, we show that rapid formation of persistent color centers (within a few seconds at 500 Hz repetition rate) inside these materials results in a marked decrease (by 40%) of the overall energy transmittance and in significant narrowing of SC spectra. We also demonstrate that the effect of color centers on the SC spectrum could be adequately simulated numerically using a simple phenomenological model which considers color centers as impurities with a certain energy bandgap.},
  doi      = {https://doi.org/10.1016/j.rinp.2019.102396},
  url      = {http://www.sciencedirect.com/science/article/pii/S2211379719313841},
}

@Article{Darginavičius2012a,
  author   = {Darginavi{\v{c}}ius, J. and Tamo{\v{s}}auskas, G. and Piskarskas, A. and Valiulis, G. and Dubietis, A.},
  title    = {Generation of tunable few optical-cycle pulses by visible-to-infrared frequency conversion},
  journal  = {Appl. Phys. B},
  year     = {2012},
  volume   = {108},
  pages    = {1--7},
  month    = {Jul},
  issn     = {1432-0649},
  abstract = {We demonstrate a simple method for infrared few optical-cycle pulse generation, which is based on collinear visible-to-infrared frequency conversion and involves difference-frequency generation and subsequent two-step optical parametric amplification. The numerical simulations and experiments using BBO crystals show an efficient frequency down conversion of visible ∼20 fs pulses from a commercial blue-pumped noncollinear optical parametric amplifier yielding 1.2--2.4 $\mu$m tunable sub-100 $\mu$J pulses with duration of 3 to 5 optical-cycles. The proposed method could be readily extended to generate few optical-cycle pulses in the mid-infrared spectral range (up to 5.5 $\mu$m) using, e.g., LiIO3 and LiNbO3 crystals, as demonstrated by the numerical simulations. In these crystals, even shorter, two-optical-cycle mid-infrared pulses could be obtained at particular wavelengths where group velocity matching between the signal and idler waves is achieved.},
  day      = {01},
  doi      = {10.1007/s00340-012-5099-1},
  url      = {https://doi.org/10.1007/s00340-012-5099-1},
}

@Article{Mihalache2012,
  author  = {Mihalache, D},
  title   = {Linear and nonlinear light bullets: Recent theoretical and experimental studies},
  journal = {Rom. J. Phys.},
  year    = {2012},
  volume  = {57},
  pages   = {352--371},
}

@Article{Suminas2017,
  author  = {Šuminas,R. and Tamošauskas,G. and Valiulis,G. and Jukna,V. and Couairon,A. and Dubietis,A.},
  title   = {Multi-octave spanning nonlinear interactions induced by femtosecond filamentation in polycrystalline {ZnSe}},
  journal = {Appl. Phys. Lett.},
  year    = {2017},
  volume  = {110},
  pages   = {241106},
  doi     = {10.1063/1.4986440},
  eprint  = {https://doi.org/10.1063/1.4986440},
  url     = { 
        https://doi.org/10.1063/1.4986440
    
},
}

@Article{Suminas2019,
  author    = {Rosvaldas \v{S}uminas and Agn\.{e} Marcinkevi\v{c}i\={u}t\.{e} and Gintaras Tamo\v{s}auskas and Audrius Dubietis},
  title     = {Even and odd harmonics-enhanced supercontinuum generation in zinc-blende semiconductors},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2019},
  volume    = {36},
  pages     = {A22--A27},
  month     = {Feb},
  abstract  = {We report on even and odd harmonics-enhanced supercontinuum generation in polycrystalline ZnS and ZnSe samples, as pumped by femtosecond mid-infrared pulses. We demonstrate that efficient generation of multiple harmonics takes place due to random quasi-phase matching, which is an intrinsic property of polycrystalline structure that supports multiple simultaneous three-wave mixing processes over a broad wavelength range. More specifically, using sub-\&\#x03BC;J, 60\&\#x00A0;fs, 3.6\&\#x00A0;\&\#x03BC;m input pulses, we measured multi-octave supercontinuum spectra spanning the 0.4\&\#x2013;5\&\#x00A0;\&\#x03BC;m and 0.5\&\#x2013;5\&\#x00A0;\&\#x03BC;m wavelength ranges in ZnS and ZnSe samples of few mm thickness, respectively. Even and odd harmonics up to the 10th order in ZnS and up to the 8th order in ZnSe were recorded with the input pulses at 4.6\&\#x00A0;\&\#x03BC;m. In contrast, filamentation in ZnTe single crystal is shown to produce only a moderate spectral broadening, which is accompanied by the generation of just second and third harmonics, highlighting the advantages of the polycrystalline structure of zinc-blende semiconductors to generate ultrabroadband radiation.},
  doi       = {10.1364/JOSAB.36.000A22},
  keywords  = {Femtosecond pulses; Laser materials; Nonlinear photonic crystals; Phase matching; Second harmonic generation; Ultrafast nonlinear optics},
  publisher = {OSA},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-36-2-A22},
}

@Article{Dobryakov2010,
  author  = {Dobryakov,A. L. and Kovalenko,S. A. and Weigel,A. and Pérez-Lustres,J. L. and Lange,J. and Müller,A. and Ernsting,N. P.},
  title   = {Femtosecond pump/supercontinuum-probe spectroscopy: Optimized setup and signal analysis for single-shot spectral referencing},
  journal = {Rev. Sci. Instrum.},
  year    = {2010},
  volume  = {81},
  pages   = {113106},
  doi     = {10.1063/1.3492897},
  eprint  = {https://doi.org/10.1063/1.3492897},
  url     = { 
        https://doi.org/10.1063/1.3492897
    
},
}

@Article{Fattahi2014,
  author    = {Hanieh Fattahi and Helena G. Barros and Martin Gorjan and Thomas Nubbemeyer and Bidoor Alsaif and Catherine Y. Teisset and Marcel Schultze and Stephan Prinz and Matthias Haefner and Moritz Ueffing and Ayman Alismail and L\'{e}n\'{a}rd V\'{a}mos and Alexander Schwarz and Oleg Pronin and Jonathan Brons and Xiao Tao Geng and Gunnar Arisholm and Marcelo Ciappina and Vladislav S. Yakovlev and Dong-Eon Kim and Abdallah M. Azzeer and Nicholas Karpowicz and Dirk Sutter and Zsuzsanna Major and Thomas Metzger and Ferenc Krausz},
  title     = {Third-generation femtosecond technology},
  journal   = {Optica},
  year      = {2014},
  volume    = {1},
  pages     = {45--63},
  month     = {Jul},
  abstract  = {Femtosecond pulse generation was pioneered four decades ago using mode-locked dye lasers, which dominated the field for the following 20 years. Dye lasers were then replaced with titanium-doped sapphire (Ti:Sa) lasers, which have had their own two-decade reign. Broadband optical parametric amplifiers (OPAs) appeared on the horizon more than 20 years ago but have been lacking powerful, cost-effective picosecond pump sources for a long time. Diode-pumped ytterbium-doped solid-state lasers are about to change this state of affairs profoundly. They are able to deliver 1 ps scale pulses at kilowatt-scale average power levels, which, in thin-disk lasers, may come in combination with terawatt-scale peak powers. Broadband OPAs pumped by these sources hold promise for surpassing the performance of current femtosecond systems so dramatically as to justify referring to them as the next generation. Third-generation femtosecond technology (3FST) offers the potential for femtosecond light tunable over several octaves, multi-terawatt few-cycle pulses, and synthesized multi-octave light transients. Unique tunability, temporal confinement, and waveform variety in combination with unprecedented average powers will extend nonlinear optics and laser spectroscopy to previously inaccessible wavelength domains, ranging from the far IR to the x-ray regime. Here we review the underlying concepts, technologies, and proof-of-principle experiments. A conceptual design study of a prototypical tunable and wideband source demonstrates the potential of 3FST for pushing the frontiers of femtosecond and attosecond science.},
  doi       = {10.1364/OPTICA.1.000045},
  keywords  = {Lasers and laser optics; Lasers, diode-pumped; Parametric oscillators and amplifiers; Ultrafast technology; Lasers, ytterbium ; Optical amplifiers; Laser energy; Laser light; Laser systems; Optical amplifiers; Optical systems; Semiconductor saturable absorber mirrors},
  publisher = {OSA},
  url       = {http://www.osapublishing.org/optica/abstract.cfm?URI=optica-1-1-45},
}

@Article{Zheltikov2019,
  author    = {Aleksei Zheltikov},
  title     = {Multioctave supercontinua and subcycle lightwave electronics},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2019},
  volume    = {36},
  pages     = {A168--A182},
  month     = {Feb},
  abstract  = {Multioctave supercontinua provide a unique resource for ultrafast optical science, offering advanced tools for time-resolved spectroscopy, frequency comb technologies, nonlinear microscopy, and lightwave engineering. The physical scenarios that enable the generation of such ultrabroadband wave packets are not always easy to describe in terms of standard models of ultrafast nonlinear optics; their properties are often unusual, and their nonlinear dynamics are much more than meets the eye. To adequately understand these new electrodynamics and to identify scenarios whereby multioctave supercontinua can coherently add up yielding subcycle field waveforms, some basic concepts and models of ultrafast nonlinear optics have to be revisited. Originally intended to refer to a rapid buildup of the spectral bandwidth of ultrashort laser pulses propagating, as waveguide modes or as free beams, in media with a third-order optical nonlinearity, within the past decade, the term \&\#x201C;supercontinuum generation\&\#x201D; has been seamlessly extended, thanks to its all-embracing character, to include very-high-order and nonperturbative nonlinear optical processes and now applies to ultrabroadband field waveform generation in the ultraviolet and x-ray ranges, as well as high-harmonic attosecond and zeptosecond supercontinua. This paper offers a brief overview of this rapidly growing field of research.},
  doi       = {10.1364/JOSAB.36.00A168},
  keywords  = {Electromagnetic radiation; Nonlinear effects; Nonlinear optics; Optical fields; Strong field physics; Ultrafast nonlinear optics},
  publisher = {OSA},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-36-2-A168},
}

@Article{Chekalin2019,
  author    = {S. V. Chekalin and A. E. Dormidonov and V. O. Kompanets and E. D. Zaloznaya and V. P. Kandidov},
  title     = {Light bullet supercontinuum},
  journal   = {J. Opt. Soc. Am. B},
  year      = {2019},
  volume    = {36},
  pages     = {A43--A53},
  month     = {Feb},
  abstract  = {Some new results of experimental and numerical investigations on light bullet spectra are depicted. The scenario of supercontinuum and light field evolution from odd harmonics generation to the appearance of broadband spectrum and pulse compression up to a single-cycle light bullet accompanied by the onset of isolated an anti-Stokes wing in spectra and high-frequency modulation of the light field is shown. An extension of the dispersion equation for the anti-Stokes band spectral maximum to all known experimental results obtained up to now for light bullet spectra in different transparent dielectrics is presented. The decisive role of multiphoton ionization in the short-wavelength cutoff of a supercontinuum is revealed experimentally, numerically, and analytically.},
  doi       = {10.1364/JOSAB.36.000A43},
  keywords  = {Electric fields; Light fields; Multiphoton ionization; Nonlinear optics; Self phase modulation; Temporal solitons},
  publisher = {OSA},
  url       = {http://josab.osa.org/abstract.cfm?URI=josab-36-2-A43},
}

@Article{Pires2015,
  author   = {H. Pires and M. Baudisch and D. Sanchez and M. Hemmer and J. Biegert},
  title    = {Ultrashort pulse generation in the mid-{IR}},
  journal  = {Prog. Quantum Electron.},
  year     = {2015},
  volume   = {43},
  pages    = {1--30},
  issn     = {0079-6727},
  abstract = {Recent developments in laser sources operating in the mid-IR (3–8μm) have been motivated by the numerous possibilities for both fundamental and applied research. One example is the ability to unambiguously detect pollutants and carcinogens due to the much larger oscillator strengths of their absorption features in the mid-IR spectral region compared with the visible. Broadband sources are of particular interest for spectroscopic applications since they remove the need for arduous scanning or several lasers and allow simultaneous use of multiple absorption features thus increasing the confidence level of detection. In addition, sources capable of producing ultrashort and intense mid-IR radiation are gaining relevance in attoscience and strong-field physics due to wavelength scaling of re-collision based processes. In this paper we review the state-of-the-art in sources of coherent, pulsed mid-IR radiation. First we discuss semi-conductor based sources which are compact and turnkey, but typically do not yield short pulse duration. Mid-IR laser gain material based approaches will be discussed, either for direct broadband mid-IR lasers or as narrowband pump lasers for parametric amplification in nonlinear crystals. The main part will focus on mid-IR generation and amplification based on parametric frequency conversion, enabling highest mid-IR peak power pulses. Lastly we close with an overview of nonlinear post-compression techniques, for decreasing pulse duration to the sub-2-optical-cycle regime.},
  doi      = {https://doi.org/10.1016/j.pquantelec.2015.07.001},
  keywords = {Mid-infrared, Nonlinear crystals, Difference-frequency generation, Optical parametric amplifiers},
  url      = {http://www.sciencedirect.com/science/article/pii/S0079672715000312},
}

@Article{Krogen2017,
  author        = {Krogen, Peter and Suchowski, Haim and Liang, Houkun and Flemens, Noah and Hong, Kyung-Han and Kärtner, Franz X. and Moses, Jeffrey},
  title         = {Generation and multi-octave shaping of mid-infrared intense single-cycle pulses},
  journal       = {Nat. Photonics},
  year          = {2017},
  volume        = {11},
  pages         = {222},
  month         = mar,
  __markedentry = {[NAG:]},
  publisher     = {Nature Publishing Group},
  url           = {https://doi.org/10.1038/nphoton.2017.34},
}

@Article{Porras2004,
  author        = {Porras, Miguel A. and Parola, Alberto and Faccio, Daniele and Dubietis, Audrius and Trapani, Paolo Di},
  title         = {Nonlinear Unbalanced Bessel Beams: Stationary Conical Waves Supported by Nonlinear Losses},
  journal       = {Phys. Rev. Lett.},
  year          = {2004},
  volume        = {93},
  pages         = {153902},
  month         = {Oct},
  __markedentry = {[NAG:6]},
  doi           = {10.1103/PhysRevLett.93.153902},
  issue         = {15},
  numpages      = {4},
  publisher     = {American Physical Society},
  url           = {https://link.aps.org/doi/10.1103/PhysRevLett.93.153902},
}

@Article{Megerle2009,
  author   = {Megerle, U. and Pugliesi, I. and Schriever, C. and Sailer, C. F. and Riedle, E.},
  title    = {Sub-50~{fs} broadband absorption spectroscopy with tunable excitation: putting the analysis of ultrafast molecular dynamics on solid ground},
  journal  = {Appl. Phys. B},
  year     = {2009},
  volume   = {96},
  pages    = {215--231},
  month    = {Aug},
  issn     = {1432-0649},
  abstract = {We give a full description of a state-of-the-art femtosecond transient spectrometer. The setup has been put together under full consideration of all technical and conceptual developments that became available in the last few years. Particular care was taken to avoid any unneeded components and modules.},
  day      = {01},
  doi      = {10.1007/s00340-009-3610-0},
  url      = {https://doi.org/10.1007/s00340-009-3610-0},
}

@Comment{jabref-meta: databaseType:bibtex;}
