Abstract

We develop a theory of the photorefractive nonlinear response for Sn2P2S6 crystals. The theory incorporates two types of charge carrier (optically active and passive), provides explicit expressions for the characteristic buildup–relaxation rates and gain factors, explains naturally a big variety of accumulated experimental data, and facilitates characterization–optimization of this important nonlinear material.

© 2007 Optical Society of America

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