Estimation of losses in a 300 m filter cavity and quantum noise reduction in the KAGRA gravitational-wave detector
Estimation of losses in a 300 m filter cavity and quantum noise reduction in the KAGRA gravitational-wave detector
复制标题
KAGRA 引力波探测器中 300 m 滤波器腔的损耗估计和量子噪声降低
DOI：
10.1103/physrevd.93.082004
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发表时间：
2016
影响因子：
5
通讯作者：
Raffaele Flaminio
中科院分区：
文献类型：
--
作者：
Eleonora Capocasa;Matteo Barsuglia;Jerome Degallaix;Laurent Pinard;Nicolas Straniero;Roman Schnabel;Kentaro Somiya;Yoichi Aso;Daisuke Tatsumi;Raffaele Flaminio
目前正在建造的引力波探测器KAGRA的灵敏度将受到其光谱中大部分量子噪声的限制。提高探测器灵敏度的最有前途的技术是注入光的压缩态，其中压缩角通过法布里-珀罗滤波腔动态旋转。在滤波器腔设计和实现中的主要问题之一是由于镜面缺陷引起的光学损耗。在这项工作中，我们提出了一个研究的规格的镜子中使用的300米过滤腔的KAGRA探测器。将在日本国家天文台前TAMA干涉仪的基础设施内建造该腔的原型。我们还讨论了潜在的改进KAGRA的灵敏度，基于各种现实来源的损失及其对压缩振幅的影响的模型。
The sensitivity of the gravitational-wave detector KAGRA, presently under construction, will be limited by quantum noise in a large fraction of its spectrum. The most promising technique to increase the detector sensitivity is the injection of squeezed states of light, where the squeezing angle is dynamically rotated by a Fabry-Pérot filter cavity. One of the main issues in the filter cavity design and realization is the optical losses due to the mirror surface imperfections. In this work we present a study of the specifications for the mirrors to be used in a 300 m filter cavity for the KAGRA detector. A prototype of the cavity will be constructed at the National Astronomical Observatory of Japan, inside the infrastructure of the former TAMA interferometer. We also discuss the potential improvement of the KAGRA sensitivity, based on a model of various realistic sources of losses and their influence on the squeezing amplitude.