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Optical Engineering

Bragg diffraction-limited photorefractive crystal-based correlators
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Paper Abstract

Although thick volume photorefractive (PR) crystal offers promise in application to large-storage-capacity holographic memories, the thickness of the material also impairs the shift-invariant properties of the correlator. We discuss the influence of the angular and the wavelength selectivity in a thick PR crystal filter. The shift tolerances of Bragg diffraction-limited PR-based correlators are analyzed, which include the Vander Lugt, joint transform, and reflection-type (RC) correlators. We have shown that the RC correlator performs the best. A simple experiment to Illustrate the shift-invariant capability of PR-based reflection-type correlators is also described.

Paper Details

Date Published: 1 August 1995
PDF: 8 pages
Opt. Eng. 34(8) doi: 10.1117/12.209475
Published in: Optical Engineering Volume 34, Issue 8
Show Author Affiliations
Francis T. S. Yu, The Pennsylvania State Univ. (United States)
Shizhuo Yin, The Pennsylvania State Univ. (United States)


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