Channeling of femtosecond laser pulses in the turbulent atmosphere

A. A. Zemlyanov; O. V. Minina

doi:10.1117/12.2601906

2 December 2021 Channeling of femtosecond laser pulses in the turbulent atmosphere

A. A. Zemlyanov, O. V. Minina

Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 1208620 (2021) https://doi.org/10.1117/12.2601906
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation

Abstract

An efficient model of multiple filamentation is described, which makes it possible to carry out estimated calculations and numerical experiments that simulate the effect of a turbulent atmosphere on the characteristics of femtosecond laser beams. The results of numerical experiments on the formation of a beam of optical filaments during the propagation of terawatt pulses of a titanium-sapphire laser under conditions of weak and moderate turbulence are presented. It is shown that, at moderate turbulence, the channeling mode for large (with a radius of 0.8 to 1 cm) intensity inhomogeneities in the initial profile of the laser beam is retained at distances of hundreds of meters. This occurs even when the value of the relative peak power of laser pulses exceeds the value of the critical self-focusing power no more than 1.5 times. It is found that the dependence of the relative radius of the laser beam on the propagation distance, normalized to the corresponding scale, remains constant on average.

Citation Download Citation

A. A. Zemlyanov and O. V. Minina "Channeling of femtosecond laser pulses in the turbulent atmosphere", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 1208620 (2 December 2021); https://doi.org/10.1117/12.2601906

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