Aperture averaging of optical scintillations based on a spectrum with high wave number bump

Erich L. Bass; Brian D. Lackovic; Larry C. Andrews

doi:10.1117/12.184051

1 January 1995 Aperture averaging of optical scintillations based on a spectrum with high wave number bump

Erich L. Bass, Brian D. Lackovic, Larry C. Andrews

Author Affiliations +

Optical Engineering, Vol. 34, Issue 1, (January 1995). https://doi.org/10.1117/12.184051

Abstract

Analytic expressions are obtained for the aperture-averaging factor associated with optical scintillations of unbounded plane waves and spherical waves in the weak fluctuation regime. This analysis is based on a modified spectrum of refractive-index fluctuations that features inner scale and a high wave number bump. Asymptotic results for both small- and large-aperture receivers compared with the first Fresnel radius (L/k)^1/2 are used to construct simple interpolation formulas, which are generally within 5% of exact numerical-integration values in the case of a plane wave and within 12% of exact values for a spherical wave. On comparison with published experimental data on spherical waves, we found similar agreement, with maximum error 8%.

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Erich L. Bass, Brian D. Lackovic, and Larry C. Andrews "Aperture averaging of optical scintillations based on a spectrum with high wave number bump," Optical Engineering 34(1), (1 January 1995). https://doi.org/10.1117/12.184051

Published: 1 January 1995

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