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首页> 外文期刊>Computer Modeling in Engineering & Sciences >Birefringence Simulations of Calcium Fluoride Single Crystal Used as Chamber Window of Gas Laser Light Source
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Birefringence Simulations of Calcium Fluoride Single Crystal Used as Chamber Window of Gas Laser Light Source

机译：气体激光光源腔窗用氟化钙单晶的双折射模拟

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摘要

CaF_2 single crystal is used as high performance optical elements. We developed an analysis system for simulating birefringence of CaF_2 single crystal used as a chamber window of a gas laser light source. The analysis system consists of a stress analysis and a birefringence analysis. In the stress analysis, the finite element method was applied to obtain the mechanical stress caused by a window holder and gas pressure. In the birefringence analysis, the photo-elastic effect gives the change of refractive indices, from which the optical path difference and the fast axis are calculated by using the average stress method. The crystal anisotropy of CaF_2 single crystal was taken into account in these analyses. We can perform a birefringence simulation for a chamber window of CaF_2 single crystal with any crystal direction and any incident direction, using this analysis system. We performed the analyses of a crystal with a surface vertical to the <111> direction under the Brewster's angle of incidence and several rotation angles. From these analyses, we obtained reasonable results of the optical path difference and the fast axis in comparison with experimental results.
机译：CaF_2单晶用作高性能光学元件。我们开发了一种用于模拟CaF_2单晶双折射的分析系统，该CaF_2单晶用作气体激光光源的腔室窗口。该分析系统包括应力分析和双折射分析。在应力分析中，应用有限元方法来获得由窗夹和气压引起的机械应力。在双折射分析中，光弹性效应会改变折射率，并使用平均应力法从中计算出光程差和快轴。在这些分析中考虑了CaF_2单晶的晶体各向异性。我们可以使用此分析系统对CaF_2单晶的腔窗进行双折射仿真，该腔窗具有任何晶体方向和任何入射方向。我们对在布鲁斯特入射角和几个旋转角下垂直于<111>方向的表面进行了晶体分析。通过这些分析，我们获得了与实验结果相比合理的光程差和快轴结果。

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