Combined effects of cross and parallel coupling in two-wave mixing in photorefractive crystals; reflection geometry
Combined effects of cross and parallel coupling have been investigated in the case of contradirectional two-wave mixing in an absorbing photorefractive crystal. Nonlinear coupled wave equations have been solved numerically by a shooting method. Presence of parallel coupling suppresses the cross coupling effect to a large extent and vice-versa. Output intensity in the case of reflection geometry has been compared with that of the transmission geometry. Results are given in the graphical form for the intensities of the two polarization components of the interacting beams.