Abstract
We present the main elements of an analytical theory of beam coupling in sillenites in the presence of a square-wave applied electric field. In a unified manner it includes optical activity, photo-elasticity, polarization and orientation properties and allows to describe the spatial amplification as applied to the optical configurations relevant to experiment. The main predictions of the theory are in good qualitative agreement with experimental results on light-induced scattering obtained with fiberlike BTO crystals.
© 1999 Optical Society of America
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