10 papers
Beating quantum limits in interferometers with quantum locking of mirrors
A Heidmann, J. -M. Courty, M. Pinard +1
The sensitivity in interferometric measurements such as gravitational-wave detectors is ultimately limited by quantum noise of light. We discuss the use of feedback mechanisms to r…
Back-action cancellation in interferometers by quantum locking
J. -M. Courty, A. Heidmann, M. Pinard
We show that back-action noise in interferometric measurements such as gravitational-waves detectors can be completely suppressed by a local control of mirrors motion. An optomecha…
Quantum locking of mirrors in interferometers
Jean-Michel Courty, A. Heidmann, M. Pinard
We show that quantum noise in very sensitive interferometric measurements such as gravitational-waves detectors can be drastically modified by quantum feedback. We present a new sc…
Optical phase-space reconstruction of mirror position at the attometer level
T. Briant, P. F. Cohadon, M. Pinard +1
We describe an experiment in which the quadratures of the position of an harmonically-bound mirror are observed at the attometer level. We have studied the Brownian motion of the m…
Experimental measurement of photothermal effect in Fabry-Perot cavities
M. De Rosa, L. Conti, M. Cerdonio +2
We report the experimental observation of the photothermal effect. The measurements are performed by modulating the laser power absorbed by the mirrors of two high-finesse Fabry-Pe…
Quantum limits of cold damping with optomechanical coupling
Jean-Michel Courty, A. Heidmann, M. Pinard
Thermal noise of a mirror can be reduced by cold damping. The displacement is measured with a high-finesse cavity and controlled with the radiation pressure of a modulated light be…