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在压缩光增强引力波干扰仪 (GEO 600) 中,反散光的表征和逃避

Fabio Bergamin, James Lough, Emil Schreiber

|November 29, 2023

概括

在引力波探测器中挤压光的注入可能会引起噪音. 一个新的控制方案去放大反射光,减少这种噪声,并改善量子噪声降低.

科学领域:

量子光学就是量子光学.
引力波检测引力波探测器
激光物理学的激光物理学

背景情况:

压缩光用于减少引力波干扰仪中的量子噪声.
挤压注射路径中的不完美隔离使光线可以散射回光学参数振荡器 (OPO).
这种反射光与压缩光生成相结合,引入不需要的测量噪声.

研究的目的:

从理论上描述由反射光引起的噪声合机制.
通过实验验证理论模型.
提出并实施一项控制方案,以减轻这种噪音.

主要方法:

开发了一种理论模型,用于从反射光的噪声合.
在GEO 600引力波探测器上进行实验.
实施了一个控制方案,用于OPO内部减弱反射光的放大.

主要成果:

理论模型经过实验验证.
实施的控制方案成功地减少了来自反射光的噪音.
实现了6dB的量子降噪,这对于OPO的高参数增益至关重要.
证明反射光噪声相当于压缩角度控制中的相位噪声增加.

结论:

开发的控制方案有效地减轻了由反射光引起的噪音.
这种缓解对于保持高OPO增益的干扰仪中的量子噪声降低至关重要.
这些发现提供了一种方法,可以更准确地估计剩余相位噪声.
了解这种噪声合机制有助于设计稳定且隔离良好的挤压注射路径.

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