Non-Gaussian Statistics of Multiple Filamentation

Details Non-Gaussian Statistics of Multiple Filamentation Non-Gaussian Statistics of Multiple Filamentation

2010-05-15

arxiv.org/abs/1005.2651v1

Optics Letters v. 35, 1965-1967 (2010)

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

10.1364/OL.35.001965

We consider the statistics of light amplitude fluctuations for the propagation of a laser beam subjected to multiple filamentation in an amplified Kerr media, with both linear and nonlinear dissipation. Dissipation arrests the catastrophic collapse of filaments, causing their disintegration into almost linear waves. These waves form a nearly-Gaussian random field which seeds new filaments. For small amplitudes the probability density function (PDF) of light amplitude is close to Gaussian, while for large amplitudes the PDF has a long power-like tail which corresponds to strong non-Gaussian fluctuations, i.e. intermittency of strong optical turbulence. This tail is determined by the universal form of near singular filaments and the PDF for the maximum amplitudes of the filaments.

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