Multigrating operation of degenerate four-wave mixing in photorefractive media is considered in the strong pump regime. Closed-form expressions for the reflectivity are obtained for the cases of absorption and no absorption. An arbitrary phase mismatch between the intensity interference fringes and the refractive-index gratings is allowed.
© 1988 Optical Society of America
W. Krolikowski and M. R. Belić, "Multigrating phase conjugation: exact results," Opt. Lett. 13, 149-151 (1988)