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Holographic gratings are written in photorefractive Sr0.61Ba0.39Nb2O6 crystals by two interfering light beams. Angular-dependent readout of the holograms shows that applying an external electric field to the crystal produces a pronounced tilting of the holograms. The results are in good agreement with theoretical predictions considering self-diffraction of the recording beams.
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Buse et al. (1995) studied this question.
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