In parallel-polarized photorefractive four-wave mixing the phase-matching condition can be achieved automatically if the pump beams are allowed to propagate in directions opposite to each other. However, in cross-polarized photorefractive four-wave mixing, the incident angles of the beams should be adjusted to maintain the phase-matching condition. We analyze the phase-matching properties of cross-polarized four-wave mixing with extraordinary writing beams and an ordinary reading beam and obtain the phase-conjugate reflectivity in consideration of phase mismatching. We also perform an experiment in which a phase-conjugate beam is generated in cross-polarized four-wave mixing and confirm the analyses.
© 1998 Optical Society of America
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.5040) Nonlinear optics : Phase conjugation
(190.5330) Nonlinear optics : Photorefractive optics
(230.4320) Optical devices : Nonlinear optical devices
Yoshihisa Takayama, Atsushi Okamoto, Motoki Saito, and Kunihiro Sato, "Cross-Polarized Photorefractive Four-Wave Mixing with Extraordinary Writing Beams and an Ordinary Reading Beam," Appl. Opt. 37, 2967-2973 (1998)