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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 19, Iss. 5 — May. 1, 2002
  • pp: 1117–1131

Infrared femtosecond light filaments in air: simulations and experiments

Arnaud Couairon, Stelios Tzortzakis, Luc Bergé, Michel Franco, Bernard Prade, and André Mysyrowicz  »View Author Affiliations


JOSA B, Vol. 19, Issue 5, pp. 1117-1131 (2002)
http://dx.doi.org/10.1364/JOSAB.19.001117


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Abstract

Experiments in which several-meter-long infrared ultrashort laser pulses are guided in air are compared with numerical simulations. During a first self-focusing stage that is affected by modulational instability, the beam is shown to break up into two channels of light that finally coalesce into a narrow filament that is able to propagate over several Rayleigh lengths. The filament propagation is associated with the generation of an electron plasma, whose density is greater than 1016 cm-3. Electron generation persists well beyond the focal region. The simulations restore the global dynamics of the pulse, including the main stages of Kerr focusing, light guiding driven by ionization, and the ultimate diffraction of the beam.

© 2002 Optical Society of America

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

Citation
Arnaud Couairon, Stelios Tzortzakis, Luc Bergé, Michel Franco, Bernard Prade, and André Mysyrowicz, "Infrared femtosecond light filaments in air: simulations and experiments," J. Opt. Soc. Am. B 19, 1117-1131 (2002)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-19-5-1117


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