Feedback-enhanced sensitivity in optomechanics: Surpassing the parametric instability barrier

Glen I. Harris, Ulrik L. Andersen, Joachim Knittel, Warwick P. Bowen

Research output: Contribution to journalJournal articleResearchpeer-review

395 Downloads (Pure)


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 languageEnglish
JournalPhysical Review A
Issue number6
Pages (from-to)061802
Publication statusPublished - 2012

Bibliographical note

©2012 American Physical Society


Dive into the research topics of 'Feedback-enhanced sensitivity in optomechanics: Surpassing the parametric instability barrier'. Together they form a unique fingerprint.

Cite this