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Trapped Ion Quantum Computing

Phase noise measurement of external cavity diode lasers and implications for optomechanical sideband cooling of GHz mechanical modes

arXiv
Authors: Tobias J. Kippenberg, Albert Schliesser, Michael Gorodetsky

Year

2011

Paper ID

30985

Status

Preprint

Abstract Read

~2 min

Abstract Words

106

Citations

N/A

Abstract

Cavity opto-mechanical cooling via radiation pressure dynamical backaction enables ground state cooling of mechanical oscillators, provided the laser exhibits sufficiently low phase noise. Here, we investigate and measure the excess phase noise of widely tunable external cavity diode lasers, which have been used in a range of recent nano-optomechanical experiments, including ground-state cooling. We report significant excess frequency noise, with peak values on the order of 10^7 rad^2 Hz near 3.5 GHz, attributed to the diode lasers' relaxation oscillations. The measurements reveal that even at GHz frequencies diode lasers do not exhibit quantum limited performance. The associated excess backaction can preclude ground-state cooling even in state-of-the-art nano-optomechanical systems.

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  • Cavity opto-mechanical cooling via radiation pressure dynamical backaction enables ground state cooling of mechanical oscillators, provided the laser exhibits sufficiently low...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1112.6277 [2] arXiv https://arxiv.org/abs/1112.6277 [3] Publisher https://arxiv.org/abs/1112.6277

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