Modeling of frequency doubling and tripling with measured crystal spatial refractive-index nonuniformities.
Modeling of frequency doubling and tripling with measured crystal spatial refractive-index nonuniformities.
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DOI：
10.1364/ao.40.001404
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发表时间：
2001-03
期刊：
影响因子：
1.9
通讯作者：
J. Auerbach;P. Wegner;S. Couture;D. Eimerl;R. Hibbard;D. Milam;M. Norton;P. Whitman;L. Hackel-L.-H
中科院分区：
文献类型：
--
作者：
J. Auerbach;P. Wegner;S. Couture;D. Eimerl;R. Hibbard;D. Milam;M. Norton;P. Whitman;L. Hackel-L.-H
有效的频率加倍和三倍对于惯性约束聚变激光系统的成功运行至关重要，例如目前正在劳伦斯利弗莫尔国家实验室建造的国家点火装置和激光能量学实验室的Omega激光器。高频转换效率很大程度上依赖于相位匹配条件的实现。在理想的变换器晶体中，可以通过对晶体整体的角度调谐或温度调谐来获得整个相位匹配条件。在实际晶体中，晶体结构的缺陷会阻碍晶体中所有位置的相位匹配。我们已经建立了频率加倍和三倍的模型，定量测量了这种偏离真实晶体的相位匹配。这是通过干涉测量在两个正交光偏振的KDP和KD*P晶体得到的。
Efficient frequency doubling and tripling are critical to the successful operation of inertial confinement fusion laser systems such as the National Ignition Facility currently being constructed at the Lawrence Livermore National Laboratory and the Omega laser at the Laboratory for Laser Energetics. High-frequency conversion efficiency is strongly dependent on attainment of the phase-matching condition. In an ideal converter crystal, one can obtain the phase-matching condition throughout by angle tuning or temperature tuning of the crystal as a whole. In real crystals, imperfections in the crystal structure prohibit the attainment of phase matching at all locations in the crystal. We have modeled frequency doubling and tripling with a quantitative measure of this departure from phase matching in real crystals. This measure is obtained from interferometry of KDP and KD*P crystals at two orthogonal light polarizations.