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IMAGE AMPLIFICATION WITH LOCAL ADDRESSING BY 2-WAVE COUPLING IN A BI12SIO20 CRYSTAL BY APPLICATION OF DIRECT-CURRENT VOLTAGE

被引：7
作者：
KAWATA, Y
KAWATA, S
MINAMI, S
机构：
[1] Department of Applied Physics, Osaka University, Osaka
[2] Center for Laser Science and Engineering, University of Iowa, Iowa, IA
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1990年 / 7卷 / 12期
关键词：
D O I：
10.1364/JOSAB.7.002362
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a proposal and an analysis of local image amplification by two-wave coupling in a Bi12SiO20 crystal by applying external dc voltage. The analogy of two-wave coupling to an optical transistor array is discussed. It is found through the experiments that the local gain in amplification is given not by the reference-beam pattern alone but also by the electric field that is formed by the local photoconductance of the Bi12SiO20 crystal. A resistance-network model is used for analysis of the electric-field distribution. A variety of experiments verify the theoretical and calculated analyses. A sample reference pattern for amplifying segments of a signal image is designed through the resistance-network analysis of the electric-field distribution. © 1990 Optical Society of America.
引用
收藏
页码：2362 / 2368
页数：7
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