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Nonlinear compansive noise reduction in joint transform correlators

[+] Author Affiliations
J. Khoury

Rome Laboratory, Hanscom Air Force Base, Massachusetts 01731, and Lartec, Inc., Concord, New Hampshire 03301

George Asimellis

Tufts University, Medford, Massachusetts 02155

Peter D. Gianino, Charles L. Woods

Rome Laboratory, Hanscom Air Force Base, Massachusetts 01731

Opt. Eng. 37(1), 66-74 (Jan 01, 1998). doi:10.1117/1.601719
History: Received June 8, 1997; Revised Aug. 25, 1997; Accepted Sep. 2, 1997
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Abstract

Compansive diffraction nonlinearities reduce the noise and improve the performance of joint transform correlators. The compression and expansion of the photorefractive two-beam coupling parallel optical device is similar to that of the limiting square-law serial electronic receiver. Computer simulations of this device indicate superior performance over a wide range of noise levels. © 1998 Society of Photo-Optical Instrumentation Engineers.

© 1998 Society of Photo-Optical Instrumentation Engineers

Citation

J. Khoury ; George Asimellis ; Peter D. Gianino and Charles L. Woods
"Nonlinear compansive noise reduction in joint transform correlators", Opt. Eng. 37(1), 66-74 (Jan 01, 1998). ; http://dx.doi.org/10.1117/1.601719


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