Amplification of the mean power of the echo signal of a spatially limited laser beam in a turbulent atmosphere
V.A. Banakh, A.V. Falits, I.V. Zaloznaya
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634055, Russia
Keywords: усиление обратного рассеяния, турбулентность, пространственно ограниченный пучок, backscatter amplification, turbulence, spatially limited beam
Abstract
The results of a numerical analysis of the manifestation of the backscatter amplification effect in the regime of weak optical turbulence in dependence on diffractive size of the transmitting aperture are presented. It is shown that the magnitude and localization of the amplification of the mean power of the radiation back scattered in a turbulent atmosphere depends on the Fresnel number of the transmitting aperture. Since the Fresnel number changes with changes in the distance from which the lidar signal arrives, this must be taken into account when profiling the intensity of optical turbulence from the lidar data on the amplification of the mean power of scattered radiation.
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