Abstract
The intracavity power, and hence sensitivity, of optomechanical sensors is commonly limited by parametric instability. Here we characterize the degradation of sensitivity induced by parametric instability in a micron-scale cavity optomechanical system. Feedback via optomechanical transduction and electrical gradient force actuation is applied to suppress the parametric instability. As a result a 5.4-fold increase in mechanical motion transduction sensitivity is achieved to a final value of 1.9×10-18 mHz-1/2.
Original language | English |
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Article number | 061802 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 85 |
Issue number | 6 |
ISSN | 1094-1622 |
DOIs | |
Publication status | Published - 2012 |