利用标准具效应对先进Virgo臂腔进行现场平衡
Using the etalon effect for in-situ balancing of the Advanced Virgo arm cavities
摘要：
几个大规模的干涉引力波探测器使用谐振臂腔来增强干涉仪臂中的光功率。这些腔基于不同的光学设计：一种设计使用楔形输入镜来创建用于导出控制信号的附加光学拾取端口。第二种设计采用无光楔的输入镜，从而提供了利用输入镜内部的标准具效应来调谐臂腔精细度的可能性。在这篇文章中，我们介绍了一个最大化的灵活性的概念，结合这两个选项，通过在输入镜的特点楔和使用标准具效应，而不是在端镜。我们提出了一个先进的处女座的臂腔的设计。我们已经使用数值模拟，以获得先进处女座的端镜标准具的制造精度的要求。此外，我们给出了解析近似的可实现的调谐范围的标准具的反射率，曲率和取向的标准具背面的依赖。
英文摘要：
Several large-scale interferometric gravitational-wave detectors use resonant arm cavities to enhance the light power in the interferometer arms. These cavities are based on different optical designs: One design uses wedged input mirrors to create additional optical pick-off ports for deriving control signals. The second design employs input mirrors without wedge and thus offers the possibility to use the etalon effect inside the input mirrors for tuning the finesse of the arm cavities. In this article we introduce a concept of maximized flexibility that combines both of these options, by featuring wedges at the input mirrors and using the etalon effect instead in the end mirrors. We present a design for the arm cavities of Advanced Virgo. We have used numerical simulations to derive requirements for the manufacturing accuracy of an end mirror etalon for Advanced Virgo. Furthermore, we give analytical approximations for the achievable tuning range of the etalon in dependence on the reflectance, the curvature and the orientation of the etalon back surface.
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