EFFECT OF THERMAL SELF-DEFOCUSING OF DEGENERATE 4-WAVE-MIXING IN ABSORBING MEDIA
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The distortion of a phase conjugate wave produced by degenerate four wave mixing as a consequence of thermal self-defocusing is reported. The thermally induced refractive index changes cause modulation in the phase of the phase conjugate wave. The thermal self-defocusing effect may impose a limiting factor in high repetition rate nonlinear devices.