Vol. 18, issue 04, article # 7

pdf Zemlyanov A. A., Geints Yu. E. Filamentation of ultrashort laser radiation in aerosol. // Atmospheric and oceanic optics. 2005. V. 18. No. 04. P. 294-298.
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We present a numerical study of the filamentation of femtosecond laser pulses in air in the presence of aerosol on the optical path. The effect of a localized absorbing layer that models an aerosol medium on the filament length has been investigated. The dependence of the length of a nonlinear wave guide not only on the optical depth of the aerosol layer, but also on its location on the propagation path has been established for the first time. The length of the filament reaches its maximum when the nonlinear focus of the beam is located behind the aerosol layer and not in front of it.