论文标题
使用射频梁形状调制模式匹配误差信号
Mode matching error signals using radio-frequency beam shape modulation
论文作者
论文摘要
需要精确的模式匹配，以最大程度地提高耦合腔干涉仪（例如高级LIGO）的性能。在本文中，我们提出了一种新的模式匹配传感方案，该方案使用单个射频高阶模式边带和单个元素光二极管。这是对未对准的一阶不敏感，可以作为一组匹配的执行器的闭环控制系统中的误差信号。我们还讨论了如何在Advanced Ligo中实施。提出的模式匹配误差信号已在桌面实验上成功证明，在该实验中，误差信号将梁匹配到空腔的模式增加到99.9％。
Precise mode matching is needed to maximize performance in coupled cavity interferometers such as Advanced LIGO. In this paper we present a new mode matching sensing scheme that uses a single radio frequency higher order mode sideband and single element photodiodes. It is first order insensitive to misalignment and can serve as an error signal in a closed loop control system for a set of mode matching actuators. We also discuss how it may be implemented in Advanced LIGO. The proposed mode matching error signal has been successfully demonstrated on a tabletop experiment, where the error signal increased the mode matching of a beam to a cavity to 99.9%.
