RECEIVER-APERTURE AVERAGING EFFECTS FOR THE INTENSITY FLUCTUATION OF A BEAM WAVE IN THE TURBULENT ATMOSPHERE.

S. J. Wang*, Y. Baykal, M. A. Plonus

*Corresponding author for this work

Research output: Contribution to journalArticle

79 Scopus citations

Abstract

Using a Gaussian weighting function for the receiver aperture, the authors obtain a closed-form representation for the receiver-aperture averaging effect for the intensity fluctuation of a beam wave in the turbulent atmosphere. It is shown that, unlike for the plane-wave case, the power scintillations do not always decrease when the receiver aperture is increased. The reasons are that (1) the intensity fluctuations on the axis for a coherent beam-wave source are smaller than these off the axis and (2) the averaging effect cannot show up when the total beam is within a coherent patch (i. e. , the coherence length is larger than the beamwidth).

Original languageEnglish (US)
Pages (from-to)831-837
Number of pages7
JournalJournal of the Optical Society of America
Volume73
Issue number6
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Engineering(all)

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