Abstract
We have simulated optical propagation through atmospheric turbulence in which the spectrum near the inner scale follows that of Hill and Clifford [J. Opt. Soc. Am. 68, 892 (1978)] and the turbulence strength puts the propagation into the asymptotic strong-fluctuation regime. Analytic predictions for this regime have the form of power laws as a function of the irradiance variance predicted by weak-fluctuation (Rytov) theory, and the inner scale. The simulations indeed show power laws for both spherical-wave and plane-wave initial conditions, but the power-law indices are dramatically different from the analytic predictions. Let where we take the reference value of to be because this is the center of our simulation region. For zero inner scale (for which the analytic prediction is and (0.37) for a plane (spherical) wave. Our simulations for a plane wave give and and for a spherical wave they give and For finite inner scale the analytic prediction is and (2.07) for a plane (spherical) wave. We find that to a reasonable approximation the behavior with and indeed factorizes as predicted, and each part behaves like a power law. However, our simulations for a plane wave give and For spherical waves we find and
© 2000 Optical Society of America
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