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24 August 2009 Generation and propagation of high-order Bessel vortices in linear and non-linear crystals
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Abstract
Linear and nonlinear processes of transferring optical singularities from anisotropic crystals onto the wavefront of Bessel light beams (BLBs) are investigated. The generation of high-order vortices at the propagation of BLBs along the optical axes of crystals was studied. Particularly, a nonlinear frequency doubling of Bessel vortices in the conditions of new type synchronism (full conical phase-matching) is considered. This scheme of three-wave interactions of BLBs based on that the spatial frequency cones of BLBs coincide with phase-matching cones of uniaxial crystals. New type of frequency doubling of Bessel vortices has been experimentally realized in uniaxial crystals.
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Vladimir N. Belyi, Nikolai A. Khilo, Andrew Forbes, and Anatol A. Ryzhevich "Generation and propagation of high-order Bessel vortices in linear and non-linear crystals", Proc. SPIE 7430, Laser Beam Shaping X, 74300F (24 August 2009); https://doi.org/10.1117/12.824851
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