INTENSITY REDISTRIBUTION IN A THIN PHOTOREFRACTIVE CRYSTAL CAUSED BY STRONG FANNING EFFECT AND INTERNAL REFLECTIONS

Citation
Aa. Kamshilin et al., INTENSITY REDISTRIBUTION IN A THIN PHOTOREFRACTIVE CRYSTAL CAUSED BY STRONG FANNING EFFECT AND INTERNAL REFLECTIONS, Journal of the Optical Society of America. B, Optical physics, 13(11), 1996, pp. 2536-2543
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Optics
ISSN journal
0740-3224
Volume
13
Issue
11
Year of publication
1996
Pages
2536 - 2543
Database
ISI
SICI code
0740-3224(1996)13:11<2536:IRIATP>2.0.ZU;2-8
Abstract
Propagation of the light beam in a thin photorefractive crystal with t he diffusion-type mechanism of nonlinearity has been studied both expe rimentally and theoretically. Total internal reflections of fanned bea ms from the crystal's side surfaces and their coupling with the pump b eam result in the light-intensity redistribution and in the generation of the photorefractive surface wave. We propose a theoretical model o f the intensity redistribution that considers the light-energy flow fr om the pump beam to the fanning beam and backward after the fanning be am reflection. A numerical simulation shows that the total internal re flection off the surface, toward which the flow of the light energy is directed, is responsible far the light-energy self-concentration. (C) 1996 Optical Society of America.