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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Optomecanical correlations and sensitivity improvement by backaction amplification

Alexandros Tavernarakis, P. Verlot, Tristan Briant, P.-F. Cohadon, A. Heidmann

Published May 1, 2011• 0 citations
Publisher

Abstract

We present our experiments devoted to the observation of quantum radiation-pressure effects and to quantum-noise reduction schemes. We have demonstrated optomechanical correlations between two independent laser beams, and a backaction amplification scheme.
DOI
10.1109/cleoe.2011.5943689

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Radiation pressure exerted by light in interferometric measurements is responsible for displacements of mirrors which appear as an additional back-action noise and limit the sensitivity of the measurement. We experimentally study these effects by monitoring in a very high-finesse optical cavity the displacements of a mirror with a sensitivity at the 10-20m/√Hz level. This unique sensitivity is a step towards the first observation of the fundamental quantum effects of radiation pressure and the resulting standard quantum limit in interferometric measurements. Our experiment may become a powerful facility to test quantum noise reduction schemes, and we already have demonstrated radiation-pressure induced correlations between two optical beams sent into the same moving mirror cavity. Our scheme can be extended down to the quantum level and has applications both in high-sensitivity measurements and in quantum optics.