NASA NTRS · 19920043939
Real-time optical correlator using photorefractive GaAs
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.
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Liu, Duncan T. H., Cheng, Li-Jen, Chao, Tien-Hsin, Yu, Jeffrey W., Gregory, Don A.. 1990-01-01. Real-time optical correlator using photorefractive GaAs. https://ntrs.nasa.gov/citations/19920043939
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