Femtosecond pulses in air: linear and nonlinear regime

Lubomir M. Kovachev; Kamen L. Kovachev; Ivaylo Tunchev

doi:10.1117/12.849380

11 November 2009 Femtosecond pulses in air: linear and nonlinear regime

Lubomir M. Kovachev, Kamen L. Kovachev, Ivaylo Tunchev

Proceedings Volume 7501, International Conference on Ultrafast and Nonlinear Optics 2009; 75010E (2009) https://doi.org/10.1117/12.849380
Event: Ultrafast Nonlinear Optics 2009, 2009, Bourgas, Bulgaria

Abstract

In linear regime the single and few cycle femtosecond (fs) pulses propagates on several diffraction lengths changing their shape in semi-spherical (or parabolic) form, far away from plane wave and paraxial approximation. The experiments with fs pulses in air with power little above the critical for self-focusing (nonlinear regime) demonstrated new nonlinear effects as self-guiding, THz longitudinal emission and superbroad enlarging of the spectrum. In this paper we continue with developing of new theoretical model for quantitative description of the above experimental results.

Citation Download Citation

Lubomir M. Kovachev, Kamen L. Kovachev, and Ivaylo Tunchev "Femtosecond pulses in air: linear and nonlinear regime", Proc. SPIE 7501, International Conference on Ultrafast and Nonlinear Optics 2009, 75010E (11 November 2009); https://doi.org/10.1117/12.849380

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