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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 11, Iss. 7 — Jul. 1, 1994
  • pp: 2080–2092

Probability-density functions of irradiance for waves in atmospheric turbulence calculated by numerical simulation

Stanley M. Flatté, Charles Bracher, and Guang-Yu Wang  »View Author Affiliations


JOSA A, Vol. 11, Issue 7, pp. 2080-2092 (1994)
http://dx.doi.org/10.1364/JOSAA.11.002080


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Abstract

We have carried out numerical simulations of waves traversing a three-dimensional random medium with Gaussian statistics and a power-law spectrum with inner-scale cutoff. The distributions of irradiance on the final observation screen provide the probability-density function (PDF) of irradiance. For both initially plane and initially spherical waves the simulation PDF’s in the strong-fluctuation regime lie between a K distribution and a log-normal-convolved-with-exponential distribution. We introduce a plot of the PDF of scaled log-normal irradiance, on which both the exponential and the lognormal PDF’s are universal curves and on which the PDF at both large and small irradiance is shown in detail. We have simulated a spherical-wave experiment, including aperture averaging, and find agreement between the simulated and the observed PDF’s.

© 1994 Optical Society of America

History
Original Manuscript: October 4, 1993
Revised Manuscript: January 19, 1994
Manuscript Accepted: January 27, 1994
Published: July 1, 1994

Citation
Stanley M. Flatté, Charles Bracher, and Guang-Yu Wang, "Probability-density functions of irradiance for waves in atmospheric turbulence calculated by numerical simulation," J. Opt. Soc. Am. A 11, 2080-2092 (1994)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-11-7-2080


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