Journal ArticleDOI
White-light filaments for atmospheric analysis.
Jérôme Kasparian,M. Rodriguez,G. Méjean,Jin Yu,E. Salmon,H. Wille,R. Bourayou,S. Frey,Y.-B. André,André Mysyrowicz,R. Sauerbrey,Jean-Pierre Wolf,Ludger Wöste +12 more
TLDR
The mobile femtosecond-terawatt laser system, Teramobile, has been constructed to study the applications of white-light and nonlinear light detection and ranging applications for atmospheric trace-gas remote sensing or remote identification of aerosols.Abstract:
Most long-path remote spectroscopic studies of the atmosphere rely on ambient light or narrow-band lasers. High-power femtosecond laser pulses have been found to propagate in the atmosphere as dynamically self-guided filaments that emit in a continuum from the ultraviolet to the infrared. This white light exhibits a directional behavior with enhanced backward scattering and was detected from an altitude of more than 20 kilometers. This light source opens the way to white-light and nonlinear light detection and ranging applications for atmospheric trace-gas remote sensing or remote identification of aerosols. Air ionization inside the filaments also opens promising perspectives for laser-induced condensation and lightning control. The mobile femtosecond-terawatt laser system, Teramobile, has been constructed to study these applications.read more
Citations
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Journal ArticleDOI
Suppression of ultrafast supercontinuum generation in a salivary protein
C. Santhosh,Aditya K. Dharmadhikari,Kamlesh Alti,Jayashree A. Dharmadhikari,Deepak Mathur,Deepak Mathur +5 more
TL;DR: The first studies of the propagation of ultrafast pulses of intense infrared light through protein media reveal that supercontinuum (white light) generation is severely suppressed in the presence of the protein alpha-amylase, a potential stress marker in human saliva.
Journal ArticleDOI
Femtosecond laser filamentation with a 4 J/60 fs Ti:Sapphire laser beam: Multiple filaments and intensity clamping
Z. G. Ji,Jiansheng Liu,Zhaolu Wang,Jingjing Ju,Xin Lu,Y. H. Jiang,Yuxin Leng,Xiaoyan Liang,Weiwei Liu,See Leang Chin,Rui Li,Z. Z. Xu +11 more
TL;DR: In this paper, the authors used both the backscattered nitrogen fluorescence signal (BSF) and ICCD fluorescence side imaging methods to study the filament light intensity with a 4 J/60 fs Ti:sapphire laser beam.
Journal ArticleDOI
Measurements of the High Field Optical Nonlinearity and Electron Density in Gases: Application to Filamentation Experiments
TL;DR: In this article, the phase shift caused by a plasma grating created by interference between the pump and probe beams in a transient birefringence measurement suggests that experimental techniques measuring cross phase modulation of a probe pulse by a strong pump pulse are unreliable for studying the optical nonlinearity when the pumps and probe pulses are of the same wavelength.
Journal ArticleDOI
Theoretical analysis of fluorescence signals in filamentation of femtosecond laser pulses in nitrogen molecular gas
E. Arévalo,Andreas Becker +1 more
TL;DR: In this article, the role of self-focusing, geometrical focusing, and the plasma defocusing in the formation of the fluorescence signal during the filamentation of a Ti:sapphire laser pulse in nitrogen molecular gas was studied.
References
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Book
The Principles of Nonlinear Optics
TL;DR: In this article, the authors present a general description of wave propagation in nonlinear media, including high-resolution nonlinear optical spectroscopy, and four-wave mixing and mixing.
Journal ArticleDOI
Compression of amplified chirped optical pulses
Donna Strickland,Gerard Mourou +1 more
TL;DR: In this paper, the amplification and subsequent recompression of optical chirped pulses were demonstrated using a system which produces 1.06 μm laser pulses with pulse widths of 2 ps and energies at the millijoule level.
Journal ArticleDOI
Self-channeling of high-peak-power femtosecond laser pulses in air
TL;DR: The self-channeling of ultrashort laser pulses through 20 m of air was demonstrated and a preliminary model is shown to explain these results.
Journal ArticleDOI
Conical emission from self-guided femtosecond pulses in air.
Erik T. J. Nibbering,P. F. Curley,G. Grillon,B. Prade,Michel Franco,François Salin,André Mysyrowicz +6 more
TL;DR: The conical emission is attributed to Cerenkov radiation from a dynamic self-guiding structure consisting of a weakly ionized core surrounded by Kerr cladding.