Structure of the spatial-temporal spectrum of laser beam in the atmosphere under strong turbulence
D.A. Marakasov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science,
Tomsk 1, Academician Zuev square, Tomsk, 634021, Russia
mda@iao.ru
Keywords: wind profile, reconstruction, spatio-temporal spectrum, strong intensity fluctuations regime
Abstract
In this paper, the analysis of the possibility of spatio-temporal filtering of the correlation function of laser beam intensity in the turbulent atmosphere at strong optical turbulence regime is presented. It is shown, that, despite significant distortions in the high-frequency band of spatio-temporal spectrum in comparison with weak turbulence regime, the increase of the temporal delay between the frames allows to separate the impacts of different intervals of the optical path. The characteristic scales of spectral responses differ essentially from current point coordinate along the path. This allows extracting the information about the wind velocity profile.
|
