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Real-time optical correlator using photorefractive GaAsA 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.
Document ID
19920043939
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Liu, Duncan T. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Cheng, Li-Jen (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chao, Tien-Hsin (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Yu, Jeffrey W. (JPL Pasadena, CA, United States)
Gregory, Don A. (U.S. Army, Missile Command, Redstone Arsenal AL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Optics
Meeting Information
Meeting: Optical Information-Processing Systems and Architectures II
Location: San Diego, CA
Country: United States
Start Date: July 9, 1990
End Date: July 13, 1990
Accession Number
92A26563
Distribution Limits
Public
Copyright
Other

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