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Phys Rev Lett. 2001 Apr 30;86(18):4021-4.

Degenerate parametric light scattering in periodically poled LiNbO3:Y:Fe.

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Institute of Physics, National Academy of Sciences, 03650, Kiev-39, Ukraine.


The first observation of parametric light scattering patterns (rings, lines, and dots) in bulk periodically poled nonlinear media is reported. Development of the scattering patterns proves efficient photorefractive grating recording and considerable parametric gain for seed radiation in this new nonlinear material. Several novel phase-matched parametric processes, caused by the periodicity of the domain structure, are revealed.

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