论文标题
精确干涉仪的几何倾斜到长度耦合：机制和分析描述
Geometric tilt-to-length coupling in precision interferometry: mechanisms and analytical descriptions
论文作者
论文摘要
倾斜到长度耦合是将角抖动或侧向抖动与干涉相信号交叉耦合的技术术语。它是精确干涉仪中重要的噪声源，它源自光路长的变化或波前和剪接效果。在本文中，我们专注于几何TTL耦合，并将其分为多种不同的机制。然后，我们证明这种几何描述并不总是足以预测干涉仪内的TTL耦合噪声。因此，我们讨论如何理解几何效果允许通过智能设计选择降低TTL噪声。此外，它们可用于抵消系统中测得的TTL噪声。所介绍的内容适用于各种精确干涉仪，包括诸如Lisa之类的空间引力波检测器。
Tilt-to-length coupling is a technical term for the cross-coupling of angular or lateral jitter into an interferometric phase signal. It is an important noise source in precision interferometers and originates either from changes in the optical path lengths or from wavefront and clipping effects. Within this paper, we focus on geometric TTL coupling and categorize it into a number of different mechanisms for which we give analytic expressions. We then show that this geometric description is not always sufficient to predict the TTL coupling noise within an interferometer. We, therefore, discuss how understanding the geometric effects allows TTL noise reduction already by smart design choices. Additionally, they can be used to counteract the total measured TTL noise in a system. The presented content applies to a large variety of precision interferometers, including space gravitational wave detectors like LISA.
