The refocusing of a high-power femtosecond laser pulse after filamentation in a layer of atmospheric aerosol has been numerically investigated. It is shown that the presence of an on-path cloud of aerosol particles in the atmosphere results in the decrement of the filament energy, and the process of pulse refocusing becomes stochastic after the aerosol layer due to the competition between the influence of perturbations induced by aerosol scattering and filtration of radiation spatial modes.
42.65.Jx Beam trapping, self-focusing and defocusing; self-phase modulation
42.68.Ay Propagation, transmission, attenuation, and radiative transfer
42.68.Jg Effects of aerosols
International Laser Center, Moscow State University, Moscow, 119991, Russia
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