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Proceedings Paper

Simulation of laser beams propagation through turbulent medium by means of Fresnel transformation
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Paper Abstract

The subject of this study is numeric simulation of laser beam propagation by methods of statistical testing, with calculation of the field in the space behind the randomly inhomogeneous phase screen based on Fresnel transformation and not on traditional spectral decomposition. This modification makes it possible to sufficiently increase efficiency of calculations for fields of disturbed beams in studies of radiation propagation through local zones of strong turbulence. Limitations of the method determined by conditions of the “sampling theorem”, by phase screen characteristics and edge effects have been considered. The possibility to simulate optical transformations of disturbed beams with increased accuracy of simulated natural experimental conditions has been noted. The results of numeric simulation have been analyzed and compared to the data obtained in natural experiments for radiation propagation through the jet of an aircraft engine. The model describes quite well experimentally identified peculiarities of spatial radiation characteristics going beyond the standard model of a turbulent layer, such as strong dependence of the angular divergence of distorted beam on the radiation wavelength and spatial anisotropy of its statistical characteristics. Finally, possible use of Fresnel transformation in modelling beam propagation in continuous randomly inhomogeneous medium represented as a sequence of phase screens has been examined.

Paper Details

Date Published: 15 December 2004
PDF: 13 pages
Proc. SPIE 5743, Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, (15 December 2004); doi: 10.1117/12.606277
Show Author Affiliations
Vladimir S. Sirazetdinov, S.I. Vavilov State Optical Institute (Russia)
Inga V. Ivanova, S.I. Vavilov State Optical Institute (Russia)

Published in SPIE Proceedings Vol. 5743:
Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics
Gennadii G. Matvienko; Vladimir P. Lukin, Editor(s)

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