Grassani Davide, Galli Matteo, Bajoni Daniele
Opt Lett. 2014 Apr 15;39(8):2530-3. doi: 10.1364/OL.39.002530.
We report on the active stabilization of a Michelson interferometer at an arbitrary phase angle with a precision better than 1° at λ=632.8 nm, which corresponds to a precision in the optical path difference between the two arms of less than 1 nm. The stabilization method is ditherless, and the error signal is computed from the spatial shift of the interference pattern of a reference laser, measured in real-time with a CCD array detector. We discuss the usefulness of this method for nanopositioning, optical interferometry, and quantum optical experiments.
我们报道了一种在任意相位角下对迈克尔逊干涉仪进行主动稳定的方法，在波长λ = 632.8 nm时精度优于1°，这对应于两臂光程差的精度小于1 nm。该稳定方法是无抖动的，误差信号由参考激光干涉图样的空间偏移计算得出，通过电荷耦合器件（CCD）阵列探测器实时测量。我们讨论了该方法在纳米定位、光学干涉测量和量子光学实验中的实用性。
