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Measurement of the photorefractive phase shift

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Abstract

We present a method to separate the effects of trap gratings and electro-optic gratings in BaTiO3 crystals, and we determine the true spatial shift between the electro-optic grating and the optical intensity pattern. At small beam-crossing angles this spatial shift is strongly affected by a photogalvanic current in the crystal.

© 1992 Optical Society of America

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