Bragg diffraction-limited photorefractive crystal-based correlators

Francis T. Yu, Shizhuo Yin

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2224-2231
Number of pages8
JournalOptical Engineering
Issue number8
StatePublished - 1995

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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