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Transient dynamics of hologram formation in BSO crystal occurring in the conditions of induced extrinsic photoconductivity

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Transient dynamics of photorefractive gratings recorded by a He-Ne laser was revealed in a BSO crystal. The transient dip on diffraction efficiency curves was considerably enhanced by pre-exposure of the sample to a green-yellow light. The recording dynamics was found to depend on the input polarization of writing beams. In particular, a transient grating with the spatial phase opposite to the initial one was observed only for the horizontal polarization. The model taking into account the nonsteady-state recording conditions and nonlinear photoconductivity was used to describe the obtained data.

© 2001 Optical Society of America

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