论文标题
估计300 m的滤波器腔和量子降噪的损失估计
Estimation of losses in a 300 m filter cavity and quantum noise reduction in the KAGRA gravitational-wave detector
论文作者
论文摘要
目前正在构造的重力波检测器Kagra的敏感性将受到其光谱很大一部分的量子噪声的限制。提高检测器敏感性的最有希望的技术是注射挤压状态的光态，其中挤压角通过Fabry-Pérot滤波器动态旋转。滤波器设计和实现的主要问题之一是由于镜面缺陷而导致的光损失。在这项工作中，我们介绍了针对Kagra检测器300 m滤光片中使用的镜子的规格。该腔的原型将在日本的国家天文天文台建造，在以前的摩托足类干涉仪的基础设施内。我们还基于各种现实损失来源及其对挤压振幅的影响的模型，讨论Kagra敏感性的潜在改善。
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.
