ANALYSIS AND COMPUTATION OF DEGENERATE 4-WAVE-MIXING IN PHOTOREFRACTIVE CRYSTALS

A boundary correction method is developed for the numerical solution of the degenerate four-wave mixing in photorefractive crystals. This method can easily deal with the problem of split boundary conditions. Results from the present method have shown that proper choices of light incident angles and pumping beam intensity ratios can lead to significant improvements in phase-correlated reflectivity (PCR). The light absorption of the interacting beams by the crystals is nonlinear in the PCR.