Suppression of extraneous thermal noise in cavity optomechanics

Yi Zhao, Dalziel J. Wilson, K. K. Ni, H. J. Kimble

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Extraneous thermal motion can limit displacement sensitivity and radiation pressure effects, such as optical cooling, in a cavityoptomechanical system. Here we present an active noise suppression scheme and its experimental implementation. The main challenge is to selectively sense and suppress extraneous thermal noise without affecting motion of the oscillator. Our solution is to monitor two modes of the optical cavity, each with different sensitivity to the oscillator's motion but similar sensitivity to the extraneous thermal motion. This information is used to imprint "anti-noise" onto the frequency of the incident laser field. In our system, based on a nano-mechanical membrane coupled to a Fabry-Pérot cavity, simulation and experiment demonstrate that extraneous thermal noise can be selectively suppressed and that the associated limit on optical cooling can be reduced.

Original languageEnglish (US)
Pages (from-to)3586-3612
Number of pages27
JournalOptics Express
Issue number4
StatePublished - Feb 13 2012
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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