Decrease of the light wave fluctuations in coherent turbulence

V. V. Nosov; V. P. Lukin; A. V. Torgaev

doi:10.1117/12.823806

11 February 2009 Decrease of the light wave fluctuations in coherent turbulence

V. V. Nosov, V. P. Lukin, A. V. Torgaev

Proceedings Volume 7296, Fifteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 72960B (2009) https://doi.org/10.1117/12.823806
Event: Fifteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2008, Krasnoyarsk, Russian Federation

Abstract

The paper describes the results of measurements of basic atmospheric parameters in different geographic regions and meteorological situations. For the measurements a mobile ultrasonic meteorological system was used. It is shown that in the mountain conditions the turbulence is of not Kolmogorov character and has the expressed characteristics of the coherent structure. The authors determined the coherent structure and their basic characteristics are indicated. The coherent turbulence differs from the incoherent Kolmogorov turbulence, and in this connection a comparison is made of amplitude-phase characteristics of the optical radiation in both cases. On a basic of the model of a three-dimensional spectrum of the temperature fluctuations the authors derived the expressions for the average square of the amplitude logarithm fluctuations <Χ²> in the approximation of geometric optics and under applicability conditions of the smooth perturbations method (MSP). For the coherent turbulence the authors obtained the expression of a vibration dispersion of a laser beam energy centre and the expression of dispersion of random shifts of a sources image characterized by coordinates of centre of gravity of intensity distribution in the telescope focal plane. It is shown that in the coherent turbulence as compared with the Kolmogorov turbulence a considerable decrease both of amplitude and phase characteristics of the optical radiation fluctuations takes place.

Citation Download Citation

V. V. Nosov, V. P. Lukin, and A. V. Torgaev "Decrease of the light wave fluctuations in coherent turbulence", Proc. SPIE 7296, Fifteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 72960B (11 February 2009); https://doi.org/10.1117/12.823806

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