优化 squeezed light 的引力波探测器设计
Optimizing Gravitational-Wave Detector Design for Squeezed Light
AI总结：
本文提出了一种优化方法，旨在通过减少散射损耗和优化信号回收腔来提升引力波探测器的量子噪声性能。
摘要：
实现第三代探测器的量子噪声目标将需要 10 dB 的 squeezed-light 增强以及干涉仪臂中的兆瓦级激光功率 - 这两项都需要前所未有的内部光学损耗控制。在本工作中，我们提出了一种新的优化方法，旨在最大化对常见但不可避免的光学制造和安装误差的鲁棒性，这些误差已导致 Advanced LIGO 产生显著损失。作为概念验证，我们运用这些技术对 LIGO A+ 设计进行了两阶段优化。首先，我们优化臂腔以减少在存在点吸收体时的散射损耗，这目前限制了 Advanced LIGO 的运行功率。然后，我们优化信号回收腔以实现最大压缩性能，考虑了光学元件位置和曲率半径的真实误差。我们的发现表明，这些技术可以被用来在当前和未来的引力波探测器中实现显著更大的量子噪声性能。
英文摘要：
Achieving the quantum noise targets of third-generation detectors will require 10 dB of squeezed-light enhancement as well as megawatt laser power in the interferometer arms - both of which require unprecedented control of the internal optical losses. In this work, we present a novel optimization approach to gravitational-wave detector design aimed at maximizing the robustness to common, yet unavoidable, optical fabrication and installation errors, which have caused significant loss in Advanced LIGO. As a proof of concept, we employ these techniques to perform a two-part optimization of the LIGO A+ design. First, we optimize the arm cavities for reduced scattering loss in the presence of point absorbers, as currently limit the operating power of Advanced LIGO. Then, we optimize the signal recycling cavity for maximum squeezing performance, accounting for realistic errors in the positions and radii of curvature of the optics. Our findings suggest that these techniques can be leveraged to achieve substantially greater quantum noise performance in current and future gravitational-wave detectors.
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