We develop a numerical method to solve the coupled-wave equations for four-wave mixing phase conjugation in a photorefractive crystal with unequal complex coupling constants; by this method we can obtain both the intensities and the phases of various beams. We discuss the intensities and the phases of the interacting beams in a photorefractive crystal for the cases in which the phase shifts between the refractive-index gratings and the interference pattern are all π/2 and in which they are not all π/2.
© 1992 Optical Society of America
Ping Xie, Jian-Hua Dai, and Hong-Jun Zhang, "Mulitigrating optical phase conjugation with considerations of phase effects," J. Opt. Soc. Am. B 9, 2240-2247 (1992)