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Atmospheric and Oceanic Optics

2020 year, number 1

Optimization of wave detuning during effective second harmonic generation

V.O. Troitskii
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: генерация второй гармоники, высокая плотность мощности лазерного излучения, численные методы, оптимизация волновой расстройки, second harmonic generation, high density of laser radiation power, numerical methods, optimization of wave detuning

Abstract

Second harmonic generation (SHG) in a nonlinear uniaxial crystal is theoretically studied. The main attention is paid to the estimation of the wave detuning effect on the SHG efficiency. The results presented confirm a strong dependence of the optimal value of wave detuning on the laser radiation power and a way of its focusing in a nonlinear crystal. A quite rapid algorithm is suggested for the numerical solution of the wave detuning optimization problem. The applicability of this algorithm to the analysis of highly efficient SHG is shown, including situations where the nonlinear conversion efficiency attains its maximum.