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Two-dimensional nonlinear beam shaping
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DOI：10.1364/OL.37.002136.png)
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Abstract
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We develop a technique for two-dimensional arbitrary wavefront shaping in quadratic nonlinear crystals by using binary nonlinear computer generated holograms. The method is based on transverse illumination of a binary modulated nonlinear photonic crystal, where the phase matching is partially satisfied through the nonlinear Raman-Nath process. We demonstrate the method experimentally showing a conversion of a fundamental Gaussian beam pump light into three Hermite-Gaussian and three Laguerre-Gaussian beams in the second harmonic. Two-dimensional binary nonlinear computer generated holograms open wide possibilities in the field of nonlinear beam shaping and mode conversion. (c) 2012 Optical Society of America
Keywords:
PHASE-MATCHING GRATINGS
2ND-HARMONIC GENERATION
AIRY BEAMS
CONVERSION
CRYSTALS
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