Abstract

We demonstrate a new type of scattering process induced by two mutually incoherent beams in photorefractive crystals. The input beams may be of different colors. Dark and bright scattering patterns were obtained by control of an external electric field. The effect results from an angular selectivity of the amplified noise. It involves an enhancement of shared gratings, induced by each input beam with a specific part of its noise, in a foward four-wave-mixing process.

© 1992 Optical Society of America

Enhancement of the signal-to-background ratio in photorefractive two-wave mixing by mutually incoherent two-beam coupling

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Phase-locked detection in photorefractive crystal at the multiple frequency difference of light beams

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Conjugation of mutually incoherent light beams in the geometry of two interconnected ring mirrors

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Symmetries of two-wave mixing in photorefractive crystals

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