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

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Abstract

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 Γ 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 Γ. Difficulties arising in the analytical solution of the fourth-moment equation are discussed.

© 1993 Optical Society of America

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