A simple high-sensitivity interferometric position sensor for test mass control on an advanced LIGO interferometer

被引:0
|
作者
Malcolm B. Gray
David E. McCLELLAND
Mark Barton
Seiji Kawamura
机构
[1] Australian National University,Department of Physics
[2] California Institute of Technology,LIGO Project
来源
Optical and Quantum Electronics | 1999年 / 31卷
关键词
high-resolution displacement measurements; interferometric position sensor;
D O I
暂无
中图分类号
学科分类号
摘要
A small Michelson interferometer has been configured as a tracking mirror displacement sensor in order to achieve both large dynamic range (2.1 mm) and excellent sensitivity \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $${\rm{(2x10}}^{--{\rm{14}}} {\rm{m/}}\sqrt {{\rm{Hz)}}} {\rm{ }}$$ \end{document} across a broad frequency range (6Hz–3 kHz). The interferometer is illuminated by a simple LED, uses broadband, non-polarising beamsplitters and contains no lensing optics. A DC-coupled balanced detector provides an error signal that is used to position the tracking mirror of the Michelson interferometer so as to maintain an interferometer operating position close to the centre of a particular fringe. The total interferometric sensor provides a small, simple and cost-effective means of achieving high-resolution displacement measurements.
引用
收藏
页码:571 / 582
页数:11
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