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Compact joint transform correlator with a thick photorefractive crystal

Francis T. S. Yu, Shundong Wu, Sumati Rajan, and Don A. Gregory

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Abstract

A compactjoint transform correlator with a thick photorefractive crystal is presented. We demonstrate that Bragg diffraction severely limits the correlation performance in a thick crystal. To relax the Bragg limitation of the crystal a Galilean telescopic beam compression technique is used in the joint transform correlator.

© 1992 Optical Society of America

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