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Phase variations during a phase-conjugation process are considered in detail, following our own method of analytical solution of the degenerate four-wave mixing including pump depletion and arbitrary phase mismatch between the light interference and the refractive-index gratings. Closed-form expressions are obtained for the phase transfer, and some apparent misconceptions concerning phase changes in optical phase conjugation are discussed.
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Krolikowski et al. (1988) studied this question.
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