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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 1 — Jan. 1, 2012
  • pp: 178–184

Thermal noise in optical cavities revisited

Thomas Kessler, Thomas Legero, and Uwe Sterr  »View Author Affiliations


JOSA B, Vol. 29, Issue 1, pp. 178-184 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000178


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Abstract

Thermal noise of optical reference cavities sets a fundamental limit to the frequency instability of ultrastable lasers. Using Levin’s formulation of the fluctuation-dissipation theorem, we correct the analytical estimate for the spacer contribution given by Numata et al. [ Phys. Rev. Lett. 93, 250602 (2004)]. For detailed analysis, finite- element calculations of the thermal noise focusing on the spacer geometry, support structure, and the usage of different materials have been carried out. We find that the increased dissipation close to the contact area between spacer and mirrors can contribute significantly to the thermal noise. From an estimate of the support structure contribution, we give guidelines for a low-noise mounting of the cavity. For mixed-material cavities, we show that the thermal expansion can be compensated without deteriorating the thermal noise.

© 2011 Optical Society of America

OCIS Codes
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3940) Instrumentation, measurement, and metrology : Metrology
(160.2750) Materials : Glass and other amorphous materials
(230.5750) Optical devices : Resonators
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: June 29, 2011
Manuscript Accepted: October 18, 2011
Published: December 16, 2011

Citation
Thomas Kessler, Thomas Legero, and Uwe Sterr, "Thermal noise in optical cavities revisited," J. Opt. Soc. Am. B 29, 178-184 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-1-178

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