Point Absorber Limits to Future Gravitational-Wave Detectors
Point Absorber Limits to Future Gravitational-Wave Detectors
复制标题
点吸收器对未来引力波探测器的限制
DOI：
10.1103/physrevlett.127.241102
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发表时间：
2021
影响因子：
8.6
通讯作者：
Ananyeva, A.
中科院分区：
文献类型：
--
作者：
Jia, Wenxuan;Yamamoto, Hiroaki;Kuns, Kevin;Effler, Anamaria;Evans, Matthew;Fritschel, Peter;Abbott, R.;Adams, C.;Adhikari, R. X.;Ananyeva, A.
高质量的光学谐振腔要求光学损耗低，通常在百万分之一的范围内。然而，谐振镜上意想不到的微米级污染物会吸收腔内循环的光，从而使表面产生热弹性变形，从而通过将光散射出谐振模式而增加损失。在一些高功率腔体实验中，点吸收效应是一个限制因素，例如高级LIGO引力波探测器。在这封信中，我们从第一性原理提出了点吸收效应的一般方法，并模拟了它对散射增加的贡献。在不同的点吸收结构下，统计计算了当前和未来引力波探测器可实现的循环功率。我们的公式在实验上得到了进一步的证实，并与先进LIGO臂腔散射功率的测量结果进行了比较。这里提出的理解提供了一个重要的工具，在全球努力设计未来的引力波探测器，支持高光功率，从而减少量子噪声。
High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface thermoelastically and thus increase losses by scattering light out of the resonant mode. The point absorber effect is a limiting factor in some high-power cavity experiments, for example, the Advanced LIGO gravitational-wave detector. In this Letter, we present a general approach to the point absorber effect from first principles and simulate its contribution to the increased scattering. The achievable circulating power in current and future gravitational-wave detectors is calculated statistically given different point absorber configurations. Our formulation is further confirmed experimentally in comparison with the scattered power in the arm cavity of Advanced LIGO measured byin situphotodiodes. The understanding presented here provides an important tool in the global effort to design future gravitational-wave detectors that support high optical power and thus reduce quantum noise.