用于纳米旋转运动传感的1.82 m^2环形laser陀螺仪
A 1.82 m^2 ring laser gyroscope for nano-rotational motion sensing
摘要：
本文介绍了一种全主动控制的He-Ne激光陀螺，工作在边长1.35m的方腔中。该装置被设计为提供环形腔几何形状的非常低的机械和热漂移，并且被设想为在激光平面的两个不同取向上操作，以便检测围绕垂直或水平方向的旋转。自2010年6月以来，该系统在Virgo干涉仪中心区域内活动，目的是对环境旋转噪声进行高灵敏度测量。迄今为止，陀螺仪的连续未尝试操作已超过30天。介绍了激光器的主要特点、主动遥控稳定系统和数据采集技术。一个离线的数据处理，支持一个简单的模型的传感器，示出，以提高有效的长期稳定性。旋转灵敏度在每平方根10纳米辐射的水平低于1赫兹，非常接近所需的规格为改善的处女座悬挂控制系统，被证明为配置的激光平面是水平的。
英文摘要：
We present a fully active-controlled He-Ne ring laser gyroscope, operating in square cavity 1.35 m in side. The apparatus is designed to provide a very low mechanical and thermal drift of the ring cavity geometry and is conceived to be operative in two different orientations of the laser plane, in order to detect rotations around the vertical or the horizontal direction. Since June 2010 the system is active inside the Virgo interferometer central area with the aim of performing high sensitivity measurements of environmental rotational noise. So far, continuous not attempted operation of the gyroscope has been longer than 30 days. The main characteristics of the laser, the active remote-controlled stabilization systems and the data acquisition techniques are presented. An off-line data processing, supported by a simple model of the sensor, is shown to improve the effective long term stability. A rotational sensitivity at the level of ten nanoradiants per squareroot of Hz below 1 Hz, very close to the required specification for the improvement of the Virgo suspension control system, is demonstrated for the configuration where the laser plane is horizontal.
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