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Appl Opt. 2000 Jun 10;39(17):2925-30.

Real-time edge-enhanced optical correlation with a cerium-doped potassium sodium strontium barium niobate photorefractive crystal.

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  • 1Institute of Modern Optics, Opto-Electronic Information Science and Technology Laboratory of the Education Ministry of China, Nankai University, Tianjin 300071, China.


The nonlinear diffraction property of a volume grating written by two-wave mixing in a cerium-doped potassium sodium strontium barium niobate crystal is applied in a coherent image processing system to obtain real-time image edge enhancement as well as edge-enhanced optical correlation. The theoretical analysis of the correlator is given, and the experimental results of optical correlation are presented, which are compared with the computer-simulated results.

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