REDUCTION OF QUANTUM-NOISE BY A CAVITY WI TH A MOBILE MIRROR

We study the quantum fluctuations of a light beam reflected by an opti cal cavity with one harmonically bound mirror. Due to radiation pressu re, the mirror is displaced and the cavity has an intensity-dependent length. The statistical properties of the reflected light are studied by a semi-classical approach including the thermal fluctuations of the mechanical motion. The results indicate that the optomechanical coupl ing between the light and the minor behaves as an effective Kerr mediu m. Near the bistability turning points, we obtain a significant quantu m-noise reduction effect, even at non zero temperature.