Heinzel Gerhard, Guzmán Cervantes Felipe, García Marin Antonio F, Kullmann Joachim, Feng Wang, Danzmann Karsten
Albert-Einstein-Institut Hannover (Max-Planck-Institut für Gravitationsphysik, and Leibniz Universität Hannover), Callinstrasse 38, 30167 Hannover, Germany.
Opt Express. 2010 Aug 30;18(18):19076-86. doi: 10.1364/OE.18.019076.
We have developed a method to equip homodyne interferometers with the capability to operate with constant high sensitivity over many fringes for continuous real-time tracking. The method can be considered as an extension of the "J1 . . .J4" methods, and its enhancement to deliver very sensitive angular measurements through Differential Wavefront Sensing is straightforward. Beam generation requires a sinusoidal phase modulation of several radians in one interferometer arm. On a stable optical bench, we have demonstrated a long-term sensitivity over thousands of seconds of 0.1 mrad/√Hz that correspond to 20 pm/ √Hz in length, and 10 nrad/ √Hz in angle at millihertz frequencies.
我们已经开发出一种方法，使零差干涉仪能够在许多条纹上以恒定的高灵敏度运行，以进行连续实时跟踪。该方法可被视为“J1……J4”方法的扩展，并且通过差分波前传感进行非常灵敏的角度测量的增强方法很简单。光束生成需要在一个干涉仪臂中进行几弧度的正弦相位调制。在一个稳定的光学平台上，我们已经证明了在数千秒内的长期灵敏度为0.1 mrad/√Hz，这对应于长度上20 pm/√Hz，以及在毫赫兹频率下角度上10 nrad/√Hz。
