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Published July 15, 1990 | Published
Journal Article Open

Periodically refreshed multiply exposed photorefractive holograms


We describe a method for increasing the diffraction efficiency of multiply exposed photorefractive holograms by periodic copying. The method is experimentally demonstrated with photorefractive and thermoplastic recording media.

Additional Information

© 1990 Optical Society of America. Received June 12, 1989; accepted April 19, 1990. This research is supported by the Defense Advanced Research Projects Agency. The authors thank Rockwell International and Ratnakar Neurgaonkar for the SBN used in these experiments. David Brady acknowledges the support of the Aerojet Corporation through the Caltech Program for Advanced Technology.

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