论文标题
对高级LIGO和未来重力波检测器中挤压的输出模式匹配要求的分析和可视化
An analysis and visualization of the output mode-matching requirements for squeezing in Advanced LIGO and future gravitational wave detectors
论文作者
论文摘要
将来通过注入频率依赖性挤压真空,将来将提高地面重力波(GW)检测器的灵敏度。可实现的改进最终受到带有GW信号的干涉仪电磁场的损失的限制。 GW信号链中光损耗的分析和降低对于最佳挤压光增强干涉法至关重要。在这项工作中,我们分析了通过使用自适应光学元件之间的空间模式不匹配而导致的策略来减少输出端损失。我们的目标不是从上到下设计探测器,而是最大程度地减少当前设计中的损失。因此,我们考虑对已经存在的光学元件进行操作,并在信号回收镜和输出模式清洁器之间添加一个传播视神经。我们计算的结果表明,使用当前高级LIGO设计的自适应模式匹配是减少损失的合适策略,可提供少于2%的平均输出模式匹配损失。所需的驱动范围为SR3上的+47 UD,OM1和OM2上的+140 MD,SRM基板上的+50 MD,以及添加的新型传输视神经上的-50 MD。这些要求在与拟议的实施相似或相同的配置中所证明的实际执行器的范围内。我们还提出了一种新颖的技术,该技术以图形方式说明了干涉仪模式的匹配,并允许对执行器的不同组合进行定量比较。
The sensitivity of ground-based gravitational wave (GW) detectors will be improved in the future via the injection of frequency-dependent squeezed vacuum. The achievable improvement is ultimately limited by losses of the interferometer electromagnetic field that carries the GW signal. The analysis and reduction of optical loss in the GW signal chain will be critical for optimal squeezed light-enhanced interferometry. In this work we analyze a strategy for reducing output-side losses due to spatial mode mismatch between optical cavities with the use of adaptive optics. Our goal is not to design a detector from the top down, but rather to minimize losses within the current design. Accordingly, we consider actuation on optics already present and one transmissive optic to be added between the signal recycling mirror and the output mode cleaner. The results of our calculation show that adaptive mode-matching with the current Advanced LIGO design is a suitable strategy for loss reduction that provides less than 2% mean output mode-matching loss. The range of actuation required is +47 uD on SR3, +140 mD on OM1 and OM2, +50 mD on the SRM substrate, and -50 mD on the added new transmissive optic. These requirements are within the demonstrated ranges of real actuators in similar or identical configurations to the proposed implementation. We also present a novel technique that graphically illustrates the matching of interferometer modes and allows for a quantitative comparison of different combinations of actuators.