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 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.
Leonard
S R
SR
Uscinski
B J
BJ