文章基本信息

标题：Image Enhancement in Coherent Optical Amplification by Photorefractive Crystals
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作者：Danyu Chen ; Fengchun Tian ; Ying Liu 等
期刊名称：Journal of Computer and Communications
印刷版ISSN：2327-5219
电子版ISSN：2327-5227
出版年度：2014
卷号：02
期号：02
页码：42-47
DOI：10.4236/jcc.2014.22008
语种：English
出版社：Scientific Research Publishing
摘要：In this paper, a model of two-wave mixing in the photorefractive crystal, which takes account of the difference in spatial frequency in a beam, has been built to study the image enhancement effect in coherent optical amplification. Based on the theoretical analysis of the model, the gain distribution for each pixel in the signal beam has been obtained. It shows that the unevenness of the gain is induced by the difference in spatial frequency in the beam. The factors that impact on the uniformity of image enhancement have been analyzed. As an example, the effects of these factors in a given photorefractive crystal have been studied through simulation.
关键词：Coherent Optical Amplification; Photorefractive Effect; Image Enhancement; Unevenness of Gain