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Self-amplified optical pattern-recognition techniqueA self-amplified optical pattern-recognition technique that utilizes a photorefractive crystal as a real-time volume holographic filter with recording accomplished by means of laser beams of proper polarization and geometric configuration is described. After the holographic filter is recorded, it can be addressed with extremely weak object beams and an even weaker reference beam to obtain a pattern-recognition signal. Because of beam-coupling energy transfer from the input object beam to the diffracted beam, the recognition signal is greatly amplified. Experimental results of this technique using BaTiO3 crystal show that 5 orders of magnitude of amplification of a recognition signal can be obtained.
Document ID
19920054970
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Liu, Hua-Kuang
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
May 10, 1992
Publication Information
Publication: Applied Optics
Volume: 31
Issue: 14, M
ISSN: 0003-6935
Subject Category
Optics
Accession Number
92A37594
Distribution Limits
Public
Copyright
Other

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