Bragg diffraction-limited photorefractive crystal-based correlators

Francis T. S. Yu; Shizhuo Yin

doi:10.1117/12.209475

1 August 1995 Bragg diffraction-limited photorefractive crystal-based correlators

Francis T. S. Yu, Shizhuo Yin

Optical Engineering, Vol. 34, Issue 8, (August 1995). https://doi.org/10.1117/12.209475

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.

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Francis T. S. Yu and Shizhuo Yin "Bragg diffraction-limited photorefractive crystal-based correlators," Optical Engineering 34(8), (1 August 1995). https://doi.org/10.1117/12.209475

Published: 1 August 1995

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