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Proceedings Paper

Real-time optical correlator using four-wave mixing in BSO crystal and moving gratings
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Paper Abstract

Based on the nonlinear property of the moving grating in BSO crystal in four-wave mixing architecture at large fringe modulation, i.e. the enhancement of the reflectivity increases as the incident beam ratio increases and the grating with large pump beam ratio can obtain higher enhancement of the reflectivity, we achieve edge-enhancement and edge-enhanced optical correlation of a binary optical image by applying the moving grating in the Fresnel transform four-wave mixing system. The relative intensity of the edge of the object is enhanced nearly 2 times. The Full- Width-at-Half-Maximum of the auto-correlation peak and the fluctuation noise if obviously suppressed, which indicate that a significant improvement in the discrimination capability of the correlator is achieved.

Paper Details

Date Published: 20 September 2001
PDF: 5 pages
Proc. SPIE 4552, Image Matching and Analysis, (20 September 2001); doi: 10.1117/12.441541
Show Author Affiliations
Baolai Liang, Hebei Univ. (China)
Qinglin Guo, Hebei Univ. (China)
Guangsheng Fu, Hebei Univ. (China)
Zhaoqi Wang, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 4552:
Image Matching and Analysis

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