Huang K, Le Jeannic H, Ruaudel J, Morin O, Laurat J
Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4 place Jussieu, 75005 Paris, France.
Rev Sci Instrum. 2014 Dec;85(12):123112. doi: 10.1063/1.4903869.
Optics experiments critically require the stable and accurate locking of relative phases between light beams or the stabilization of Fabry-Perot cavity lengths. Here, we present a simple and inexpensive technique based on a stand-alone microcontroller unit to perform such tasks. Easily programmed in C language, this reconfigurable digital locking system also enables automatic relocking and sequential functioning. Different algorithms are detailed and applied to fringe locking and to low- and high-finesse optical cavity stabilization, without the need of external modulations or error signals. This technique can readily replace a number of analog locking systems advantageously in a variety of optical experiments.
光学实验极其需要稳定且精确地锁定光束之间的相对相位，或者稳定法布里 - 珀罗腔的长度。在此，我们提出一种基于独立微控制器单元的简单且低成本的技术来执行此类任务。该可重构数字锁定系统易于用C语言编程，还能实现自动重新锁定和顺序运行。详细介绍了不同算法，并将其应用于条纹锁定以及低精细度和高精细度光学腔的稳定，无需外部调制或误差信号。在各种光学实验中，该技术能够很容易地有利地取代许多模拟锁定系统。
