Abstract

A method for double (or mutual) phase conjugation is proposed that uses two thin layers with a third-order optical nonlinearity; it uses the transformation of phase modulation into amplitude modulation, a technique similar to that of a Zernike microscope. The conditions for the buildup of conjugate waves are above threshold if the modulus of the product of the nonlinearities of the two layers is negative and large enough. The saturated regime and the elimination of nonconjugate waves are studied theoretically. The possibilities of using liquid crystals and multiple quantum wells are discussed.

© 1994 Optical Society of America

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