27 December 1990 Real-time optical correlator using photorefractive GaAs
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Duncan Tsuen-Hsi Liu, Duncan Tsuen-Hsi Liu, Li-Jen Cheng, Li-Jen Cheng, Tien-Hsin Chao, Tien-Hsin Chao, Jeffrey W. Yu, Jeffrey W. Yu, Don A. Gregory, Don A. Gregory, } "Real-time optical correlator using photorefractive GaAs", Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); doi: 10.1117/12.23405; https://doi.org/10.1117/12.23405

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