Abstract
Backward wave degenerate four-wave mixing in solid nonlinear materials CdTe and LiTaO<sub>3</sub> is investigated. Amplified reflection of the fourth wave with wavefront complex conjugate to the signal wave is first observed in solid state medium. The theory of four-wave mixing for the case of strong coupling of the signal and pump beams is developed. It is shown that total intensity of each pump wave may be transfered into one of the signal waves for equal intensities of the pump beams.
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