New nonlinear properties of the orthorhombic ferroelectric and ferroelastic Gd2(MoO4)3 crystals, the ability for efficient (up to 70%) generation of multiple (up to fourth) Stokes emission and creation of filament optical channeling, are observed. Gd2(MoO4)3 crystals with Ln3+ ions are supported to be also good candidates for lasers with self-stimulated Raman scattering. For KY(WO4)2, KGd(WO4)2, and NaLa(MoO4)2 crystals new Stokes wavelengths were excited, too.
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Kaminskiĭ et al. (1996) studied this question.
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