Abstract
The phase-conjugate reflectivity obtainable by degenerate four-wave mixing in silicon at a 1.06 μm is calculated including free-carrier absorption. A maximum reflectivity of more than 100% is possible. The dependence of the reflectivity on the signal and pump energy densities up to 70 mJ/cm2 is measured and found to agree with theory. The wave-front-correction property of DFWM is demonstrated with a lens in the signal beam.
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