We analyze the phase-conjugate reflectivity and the amplification property of cross-polarized four-wave mixing with a photorefractive BaTiO<sub>3</sub> crystal in consideration of the pump-beam depletion. The coupled-wave equations of cross-polarized four-wave mixing with ordinary writing beams and an extraordinary reading beam are derived and solved with the grating-integral method. The results of calculations of the reflectivity and the amplification factors will be compared with the result under the undepleted-pumps approximation. In addition, to achieve high conversion efficiency, the optimum conditions for the intensity ratio and the angle configurations of the probe and pump beams are also discussed.
© 1998 Optical Society of America
Hisashi Matsuoka, Atsushi Okamoto, Mototsugu Takamura, and Kunihiro Sato, "Reflectivity of photorefractive cross-polarized four-wave mixing in consideration of pump depletion," J. Opt. Soc. Am. B 15, 1545-1552 (1998)