Real-time optical correlator using photorefractive GaAs

Duncan Tsuen-Hsi Liu; Li-Jen Cheng; Tien-Hsin Chao; Jeffrey W. Yu; Don A. Gregory

doi:10.1117/12.23405

27 December 1990 Real-time optical correlator using photorefractive GaAs

Duncan Tsuen-Hsi Liu, Li-Jen Cheng, Tien-Hsin Chao, Jeffrey W. Yu, Don A. Gregory

Proceedings Volume 1347, Optical Information Processing Systems and Architectures II; (1990) https://doi.org/10.1117/12.23405
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

A real-time optical correlator based on GaAs and liquid-crystal TV (LCTV) is demonstrated. The demonstrated system has a video-frame rate limited by the speed of the LCTVs; if faster spatial-light modulators are used, the potential frame rate of a GaAs-based correlator can be as fast as 1000 frames/sec under experimental conditions. Comparisons are made between VanderLugt and joint transform and between degenerate and nondegenerate four-wave mixing. The edge-enhancement effect and the Bragg diffraction effect are discussed.

Citation Download Citation

Duncan Tsuen-Hsi Liu, Li-Jen Cheng, Tien-Hsin Chao, Jeffrey W. Yu, and Don A. Gregory "Real-time optical correlator using photorefractive GaAs", Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); https://doi.org/10.1117/12.23405

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