Accurate numerical solutions for the frequency cross correlation of intensity fluctuations in a random medium

The fourth-moment equation for the cross-frequency correlation of intensity fluctuations of a plane wave propagating in a random medium is solved numerically by using an adaptive grid method. A wide range of frequency ratios r and scattering strength parameters Gamma are considered, and approximate...

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Bibliographic Details
Published in:Applied optics (2004) 1993-05, Vol.32 (15), p.2656-2663
Main Authors: Leonard, S R, Uscinski, B J
Format: Article
Language:English
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Summary:The fourth-moment equation for the cross-frequency correlation of intensity fluctuations of a plane wave propagating in a random medium is solved numerically by using an adaptive grid method. A wide range of frequency ratios r and scattering strength parameters Gamma are considered, and approximate laws for the height and position of the peak of the covariance of intensities are obtained as functions of r and Gamma. Difficulties arising in the analytical solution of the fourth-moment equation are discussed.
ISSN:1559-128X
DOI:10.1364/AO.32.002656