Abstract
In this article, our studies about the generation mechanisms of self-pumped phase conjugation (SPPC) in photorefractive crystals are reviewed. The variations of SPPC generation mechanism with operation wavelengths, doping concentrations, incident positions and incident angles, and incident configurations were investigated experimentally. It is indicated that the essential factors that determine the SPPC generation mechanisms are the backscattering gain coefficient and the scattering strength of scattering centers in the crystals.
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