Abstract

We have recorded running holograms in a photorefractive crystal with an applied electric field, using a 90° phase-shift fringe-locked interference pattern of light. This method provides a simple way to obtain optimal conditions for nonstationary holographic recording. The experiment that we describe allows us to calculate the crystal diffusion length LD and provides direct evidence of the occurrence of running holograms in photorefractive crystals. Experimental results for a Bi12SiO20 sample are reported.

© 1989 Optical Society of America

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