Articles

Fringe-adjusted incoherent erasure joint transform correlator

[+] Author Affiliations
Mohammad S. Alam

Purdue University, ET 327A, Department of Electrical Engineering, 2101 Coliseum Boulevard East, Fort Wayne, Indiana 46805-1499, and Indiana University, Graduate Faculty, Bloomington, Indiana

Jehad S. Khoury

Lartec Inc., East Ridge Drive, Concord, New Hampshire 03301, and Air Force Rome Laboratory, Medford, Massachusetts 01731

Opt. Eng. 37(1), 75-82 (Jan 01, 1998). doi:10.1117/1.601828
History: Received June 8, 1997; Revised Aug. 18, 1997; Accepted Aug. 21, 1997
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Abstract

A new all-optical nonlinear fringe-adjusted joint transform correlation (JTC) technique is proposed. The proposed scheme is based on incoherent-to-coherent conversion with the erasure of a four-wave mixing arrangement in a real-time photorefractive media. This technique is very fast because it generates the correlation output in one step and all intermediate processing is performed in the optical domain. Furthermore, this technique eliminates the problems due to nonlinearities associated with the square-law devices and spatial light modulators used for recording the joint power spectrum. Computer simulation results show that the proposed joint transform correlator yields superior performance when compared to the alternative joint transform correlator architectures. © 1998 Society of Photo-Optical Instrumentation Engineers.

© 1998 Society of Photo-Optical Instrumentation Engineers

Citation

Mohammad S. Alam and Jehad S. Khoury
"Fringe-adjusted incoherent erasure joint transform correlator", Opt. Eng. 37(1), 75-82 (Jan 01, 1998). ; http://dx.doi.org/10.1117/1.601828


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