Trad Nery Marina, Venneberg Jasper R, Aggarwal Nancy, Cole Garrett D, Corbitt Thomas, Cripe Jonathan, Lanza Robert, Willke Benno
Opt Lett. 2021 Apr 15;46(8):1946-1949. doi: 10.1364/OL.422614.
This Letter reports the experimental realization of a novel, to the best of our knowledge, active power stabilization scheme in which laser power fluctuations are sensed via the radiation pressure driven motion they induce on a movable mirror. The mirror position and its fluctuations were determined by means of a weak auxiliary laser beam and a Michelson interferometer, which formed the in-loop sensor of the power stabilization feedback control system. This sensing technique exploits a nondemolition measurement, which can result in higher sensitivity for power fluctuations than direct, and hence destructive, detection. Here we used this new scheme in a proof-of-concept experiment to demonstrate power stabilization in the frequency range from 1 Hz to 10 kHz, limited at low frequencies by the thermal noise of the movable mirror at room temperature.
本信函报道了一种新颖的有功功率稳定方案的实验实现，据我们所知，该方案通过激光功率波动在可移动镜面上引起的辐射压力驱动运动来感测激光功率波动。镜面位置及其波动通过一束弱辅助激光束和一台迈克尔逊干涉仪来确定，它们构成了功率稳定反馈控制系统的环路内传感器。这种传感技术采用了一种非破坏性测量方法，与直接检测（因此具有破坏性）相比，它对功率波动的灵敏度更高。在这里，我们在一个概念验证实验中使用了这种新方案，以证明在1赫兹至10千赫兹的频率范围内实现功率稳定，在低频时受室温下可移动镜面的热噪声限制。
