Using the etalon effect for in situ balancing of the Advanced Virgo arm cavities
Using the etalon effect for in situ balancing of the Advanced Virgo arm cavities
复制标题
利用标准具效应对 Advanced Virgo 臂腔进行原位平衡
DOI：
10.1088/0264-9381/26/2/025005
复制
发表时间：
2008
影响因子：
3.5
通讯作者：
R. Schilling
中科院分区：
文献类型：
--
作者：
S. Hild;A. Freise;M. Mantovani;S. Chelkowski;J. Degallaix;R. Schilling
一些大型干涉引力波探测器使用共振臂腔来增强干涉臂中的光功率。这些腔体基于不同的光学设计：一种设计使用楔形输入镜来创建额外的光学拾取端口，以获得控制信号。第二种设计采用了没有楔形的输入反射镜，从而提供了利用输入反射镜内部的标准子效应来调整臂腔的精细度的可能性。在本文中，我们引入了一个最大灵活性的概念，结合了这两种选择，通过在输入镜上设置楔形，并在端镜上使用标准子效应来代替。我们提出了一种先进室女座臂腔的设计。本文的重点是评估标准子缺陷对高级处女座整体性能的影响。采用数值模拟的方法推导出高级处女座的端镜标准子的制造精度要求。在此基础上，我们给出了不完全标准子可实现调谐范围的解析近似，该调谐范围取决于两个标准子表面的曲率和方向不匹配。我们评估了由温度驱动的标准子光学相位噪声引起的位移噪声。此外，还分析了标准子效应对其他先进处女座子系统如对准传感和控制的影响。
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 of using the etalon effect inside the input mirrors for tuning the finesse of the arm cavities. In this paper, we introduce a concept of maximum 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. The paper focusses on evaluating the influence of etalon imperfections onto the overall Advanced Virgo performance. We use 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 an imperfect etalon depending on the curvature and orientation mismatch of the two etalon surfaces. We evaluate the displacement noise originating from temperature driven optical phase noise of the etalon. In addition the influence of the etalon effect onto other Advanced Virgo subsystems such as the alignment sensing and control is analysed.