Title

Optical Scintillation Of A Gaussian Beam In Moderate-To-Strong Irradiance Fluctuations

Abstract

A model of irradiance fluctuations for a propagating optical wave in a weakly inhomogeneous medium is developed here under the assumption that small-scale irradiance fluctuations are modulated by large-scale irradiance fluctuations of the wave. The resulting scintillation index from this theory has the form σ12 = σX2 + σY2 + σX2 σY2 where σX2 denotes large-scale scintillation and σY2 denotes small-scale scintillation. By applying a modification of the Rytov method that incorporates an amplitude spatial frequency filter function under strong fluctuation conditions, tractable expressions are developed for the scintillation index of a Gaussian beam wave that are valid under moderate-to-strong irradiance fluctuations. The expected scintillation of Gaussian beams predicted by these analytic models is compared to the experimental data previously published.

Publication Date

12-1-1999

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

3706

Number of Pages

142-150

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0033312816 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0033312816

This document is currently not available here.

Share

COinS