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Nonlinear diffraction from high-order Hermite - Gauss beams

机译:高阶Hermite-Gauss光束的非线性衍射

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We investigate experimentally and theoretically the nonlinearly diffracted second harmonic light from the first-order Hermite-Gauss beam. We investigate the cases of loosely and tightly focused beams in a periodically poled lithium niobate crystal in the temperature range near the birefringent phase matching. Unlike the case of fundamental Gaussian beam, the nonlinear diffracted beam is spatially structured. Its shape depends on the focusing conditions and on the crystal temperature. Furthermore, for the case of tight focusing, the diffracted beam structure depends on the beam's position with respect to the domain wall. (C) 2014 Optical Society of America
机译:我们在实验和理论上研究来自一阶Hermite-Gauss光束的非线性衍射二次谐波光。我们研究了在双折射相位匹配附近的温度范围内周期性极化的铌酸锂晶体中束束松散和紧束的情况。与基本高斯光束不同,非线性衍射光束是空间结构的。它的形状取决于聚焦条件和晶体温度。此外,对于紧密聚焦的情况,衍射光束结构取决于光束相对于畴壁的位置。 (C)2014年美国眼镜学会

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