Laser power stabilization via radiation pressure

This Letter reports the experimental realization of a novel, to best our knowledge, active power stabilization scheme in which laser fluctuations are sensed via radiation pressure driven motion they induce on movable mirror. The mirror position and its were determined by means weak auxiliary beam Michelson interferometer, formed in-loop sensor feedback control system. sensing technique exploits nondemolition measurement, can result higher sensitivity for than direct, hence destructive, detection. Here we used this new proof-of-concept experiment demonstrate frequency range from 1 Hz 10 kHz, limited at low frequencies thermal noise room temperature.