Elliptical-focusing effect on parametric oscillation and downconversion
Elliptical-focusing effect on parametric oscillation and downconversion
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参量振荡和下变频的椭圆聚焦效应
DOI：
10.1364/josab.15.002455
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发表时间：
1998
影响因子：
1.9
通讯作者：
J. Greve
中科院分区：
文献类型：
--
作者：
T. W. Tukker;C. Otto;J. Greve
本文从理论上研究了单谐振光学参量振荡器的最优聚焦参数的计算和椭圆聚焦差频的产生。该模型考虑了衍射、相位匹配、光束漂移和谐振腔像散的影响。结果表明，在光束参数不等的情况下，获得了最优的聚焦构型；当晶体中存在光束漂移时，椭圆光束轮廓可以显著提高转换效率。
A theoretical study is presented that enables the calculation of the optimal focusing parameters in a singly resonant optical parametric oscillator and difference-frequency generation with elliptical foci. The effect of diffraction, phase matching, beam walk-off, and resonator astigmatism are included in the model. The results show that an optimal focusing configuration is obtained with unequal confocal beam parameters and that an elliptical beam profile can substantially increase the conversion efficiency when beam walk-off is present in the crystal.