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Polarization-insensitive phase conjugation, achieved based on difference-frequency generation in a second-order nonlinear composite consisting of stacked KTP plates, was exploited to restore blurred images due to phase distortion as a novel scheme.
Based on adhesive-free-bonded periodically-inverted KTP plates, we have generated a phase-conjugated beam that is insensitive to polarization of the input beam. Such a process can be used to correct a blurred image caused by turbulence.
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