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Beam amplification resulting from non-Bragg wave mixing in photorefractive strontium barium niobate

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Abstract

Two-wave mixing with a small angle between beams in a photorefractive crystal biased with an external electric field leads to the formation of additional non-Bragg orders and to wave amplification. A steady-state gain of 25 cm-1 was obtained for an external voltage of 3 kV/cm in strontium barium niobate. Noise amplification and oscillation are also demonstrated.

© 1998 Optical Society of America

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