Filamentation of femtosecond laser radiation in the air at the aberration focusing regime

D. V. Apeksimov; Yu. E. Geints; A. M. Kabanov; A. V. Petrov; E. E. Khoroshaeva; V. F. Losev; S. V. Alekseev

doi:10.1117/12.2644906

7 December 2022 Filamentation of femtosecond laser radiation in the air at the aberration focusing regime

D. V. Apeksimov, Yu. E. Geints, A. M. Kabanov, A. V. Petrov, E. E. Khoroshaeva, V. F. Losev, S. V. Alekseev

Author Affiliations +

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123410Z (2022) https://doi.org/10.1117/12.2644906
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

The work presents the results of laboratory experiments on controlling the filamentation domain of a focused femtosecond laser beam with a spatially structured (using a deformable mirror) wavefront. We studied aberration beams consisting of coherent nested annular subapertures obtained with a specific shape of a deformable mirror determined from theoretical estimates. This makes it possible to create inhomogeneities in distribution of the optical field amplitude during propagation of the laser beam, which can subsequently become seeds for the light filaments formation. This regime of high-power radiation filamentation control does not require compensation for distortions in the initial beam profile, but on the contrary, it is based on the controlled introduction of preliminarily calculated wavefront aberrations.

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D. V. Apeksimov, Yu. E. Geints, A. M. Kabanov, A. V. Petrov, E. E. Khoroshaeva, V. F. Losev, and S. V. Alekseev "Filamentation of femtosecond laser radiation in the air at the aberration focusing regime", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123410Z (7 December 2022); https://doi.org/10.1117/12.2644906

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KEYWORDS

Femtosecond phenomena

Deformable mirrors

Mirrors

Atmospheric propagation

Laser beam propagation

Plasma

Diffraction

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