Investigation of retroreflection scheme for optical phase conjugation by degenerate four-wave mixing

The authors present theoretical and experimental data which show that the value of the phase conjugate reflectivity of degenerate four-wave mixing depends on whether the retroreflection or counterpropagating schemes are used. It is also shown that the retroflection method may result in decay constants which are not related to the decay of the gratings formed in the nonlinear medium.<
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