Investigation of nonlinear propagation of powerful femtosecond laser radiation through aerosol
A.D. Bulygin, A.V. Petrov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: femtosecond laser pulse, filamentation, aerosol, phase screen, Helmholtz equation
Abstract
The paper considers the propagation of high-power femtosecond laser radiation through aerosol. The propagation of high-power femtosecond laser radiation is simulated with flat phase screens that simulate the passage of radiation through an aerosol layer, which has effective optical parameters corresponding to different intensities during nonlinear interaction. In the course of experimental studies, the effect of aerosol on the position and length of the filamentation domain and the number of filaments was shown. With a decrease in the concentration of aerosol particles in the air in front of the filamentation domain, the filamentation domain approaches and its length increases to the same size as without aerosol, and the number of filaments also increases.
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