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Proceedings Paper

Fringe-adjusted nonlinear incoherent-erasure joint transform correlation
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Paper Abstract

A new all-optical nonlinear fringe-adjusted joint transform correlation 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 alternate joint transform correlator architectures.

Paper Details

Date Published: 1 April 1998
PDF: 12 pages
Proc. SPIE 3402, Optical Information Science and Technology (OIST97): Optical Memory and Neural Networks, (1 April 1998); doi: 10.1117/12.304967
Show Author Affiliations
Mohammad S. Alam, Purdue Univ. (United States)
Jehad Khoury, Lartec Inc. (USA) and Rome Lab. (United States)


Published in SPIE Proceedings Vol. 3402:
Optical Information Science and Technology (OIST97): Optical Memory and Neural Networks
Andrei L. Mikaelian, Editor(s)

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