Interferometric wavefront sensing with a single diode using spatial light modulation.
Interferometric wavefront sensing with a single diode using spatial light modulation.
复制标题
使用空间光调制的单个二极管进行干涉波前传感。
作者：
D. Tarquin Ralph;P. Altin;D. Rabeling;D. McClelland;D. Shaddock
提出了一种新的光学干涉仪精密对准检测技术。与使用多元件光电二极管的传统波前传感系统不同，这种方法使用单元件光电二极管，结合空间光调制器（SLM）和数字增强外差干涉测量。由于所有信号都通过单个光电检测和模拟路径，因此该技术对传统系统中存在的低频误差具有高共模抑制能力。通过改变SLM上的调制图案，该技术还可以扩展到检测高阶波前误差。在本文中，我们演示了实验技术和比较性能与传统的外差波前传感系统。这可以改进和简化天基干涉仪（如计划中的丽莎引力波探测器）中的对准系统，并提供一种优化激光腔中功率的方法，这是传统分段二极管方法所不可能实现的。
We present a new technique for the fine alignment sensing of optical interferometers. Unlike conventional wavefront sensing systems, which use multielement photodiodes, this approach works with a single-element photodiode, in combination with a spatial light modulator (SLM) and digitally enhanced heterodyne interferometry. As all signals pass through a single photodetection and analog path, the technique exhibits high common-mode rejection to low frequency errors present in conventional systems. By changing the modulation pattern on the SLM, the technique can also be extended to sensing higher-order wavefront errors. In this paper, we demonstrate the technique experimentally and compare performance with a conventional heterodyne wavefront sensing system. This may improve and simplify alignment systems in space-based interferometers such as the planned LISA gravitational wave detector and provide a way to optimize the power in laser cavities not possible with the traditional segmented diode approach.
影响因子：
4.4
作者：
Sheard, B. S.;Heinzel, G.;Folkner, W. M.
通讯作者：
Folkner, W. M.