25 May 2005 About laser beam spatial fluctuations in random-inhomogeneous media
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Proceedings Volume 5793, Atmospheric Propagation II; (2005); doi: 10.1117/12.612959
Event: Defense and Security, 2005, Orlando, Florida, United States
Abstract
In optical radar, communication, and energy transfer one frequently encounters the problem of transportating optical radiation energy to an object located in a randomly inhomogeneous medium. The scattering by the refractive index inhomogeneities of such a medium reduces the average intensity in the axial part of light beam and generates fluctuations of the intensity, so that the result is a considerable deterioration of the energy characteristics of systems operating in such media. The amplitude and phase fluctuations of Gaussian beam, propagated through the turbulent atmosphere, are not spatially homogeneous in a transversal beam section. Here we introduce an estimation criterion for beam computed for some different values of aperture/beam diameter ratio. The numerical simulations of beam propagation through the random-inhomogeneous media were performed using modified splitting method. The results of numerical experiments as well as the behavior of proposed criterion are discussed.
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P. A. Konyaev, V. P. Lukin, V. A. Sennikov, V. A. Tartakovsky, "About laser beam spatial fluctuations in random-inhomogeneous media", Proc. SPIE 5793, Atmospheric Propagation II, (25 May 2005); doi: 10.1117/12.612959; https://doi.org/10.1117/12.612959
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KEYWORDS
Atmospheric propagation

Atmospheric optics

Adaptive optics

Wave propagation

Beam propagation method

Wavefronts

Adaptive control

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