Abstract

Cross talk between two beams incident upon a four-wave-mixing phase conjugator was investigated experimentally as a function of beam input angles and beam intensities for the case when both input beams and the four-wave-mixing pumps were the same frequency. Intensity cross talk in the conjugated return beams was observed. Analysis shows that intensity cross talk arises from a competition for pump intensity that occurs when the sum of the two input probe intensities is more than a few percent of the pumps. A model of this mechanism has been developed that permits quantitative prediction of intensity cross talk.

© 1989 Optical Society of America

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