Femtosecond filamentation dynamics of synthesized coronary profile laser beam in air: numerical simulations

Yury E. Geints; Alexander A. Zemlyanov

doi:10.1117/12.2601461

2 December 2021 Femtosecond filamentation dynamics of synthesized coronary profile laser beam in air: numerical simulations

Yury E. Geints, Alexander A. Zemlyanov

Author Affiliations +

Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 120860I (2021) https://doi.org/10.1117/12.2601461
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation

Abstract

Multiple filamentation in air of high-power ultrashort laser radiation with transverse intensity profile resembling a “corona-beam” (CB) composed by incoherent combining of several annularly distributed independent top-hat sub-beams is theoretically considered. Through the numerical solution of time-averaged nonlinear Schrodinger equation, we study the spatio-angular dynamics of synthesized near infrared CB along the optical path by varying the number and peak power of the beamlets. The evident advances in the multiple-filamentation region manipulating of synthesized CB are demonstrated. Particularly, by adjusting the number and aperture of the constituting sub-beams it makes possible to significantly delay the filamentation onset distance and increase the filamentation length in air.

Citation Download Citation

Yury E. Geints and Alexander A. Zemlyanov "Femtosecond filamentation dynamics of synthesized coronary profile laser beam in air: numerical simulations", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 120860I (2 December 2021); https://doi.org/10.1117/12.2601461

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