Laser phase noise effects on the dynamics of optomechanical resonators

Details Laser phase noise effects on the dynamics of optomechanical resonators Laser phase noise effects on the dynamics of optomechanical resonators

2010-11-01

arxiv.org/abs/1011.0455v1

Physics

Quantum Physics

9 pages, 7 figures

Scientific paper

We investigate theoretically the influence of laser phase noise on the cooling and heating of a generic cavity optomechanical system. We derive the back-action damping and heating rates and the mechanical frequency shift of the radiation pressure-driven oscillating mirror, and derive the minimum phonon occupation number for small laser linewidths. We find that in practice laser phase noise does not pose serious limitations to ground state cooling. We then consider the effects of laser phase noise in a parametric cavity driving scheme that minimizes the back-action heating of one of the quadratures of the mechanical oscillator motion. Laser linewidths narrow compared to the decay rate of the cavity field will not pose any problems in an experimental setting, but broader linewidths limit the practicality of this back-action evasion method.

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