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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 15 — May. 20, 2008
  • pp: 2840–2851

Modal frequency degeneracy in thermally loaded optical resonators

Amber L. Bullington, Brian T. Lantz, Martin M. Fejer, and Robert L. Byer  »View Author Affiliations


Applied Optics, Vol. 47, Issue 15, pp. 2840-2851 (2008)
http://dx.doi.org/10.1364/AO.47.002840


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Abstract

We observe power coupling from the fundamental mode to frequency-degenerate higher-order spatial modes in optical resonators illuminated with a 30 W laser. Thermally-induced modal frequency degeneracy facilitates power transfer from the fundamental mode to higher-order modes, reduces power coupling into the cavity, and triggers power fluctuations. Modeling thermoelastic deformation of a mirror’s surface shows predicted modal frequency degeneracy to be in reasonable agreement with experimental observations. Predictions for the Laser Interferometer Gravitational-wave Observatory (LIGO) show that the circulating fundamental-mode power necessary for gravitational-wave detection is compromised at coating absorptions of 3.8 and 0.44 ppm for Enhanced and Advanced LIGO Fabry–Pérot cavities, respectively.

© 2008 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.4780) Lasers and laser optics : Optical resonators
(140.6810) Lasers and laser optics : Thermal effects
(230.5750) Optical devices : Resonators
(260.5740) Physical optics : Resonance

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 4, 2007
Revised Manuscript: April 11, 2008
Manuscript Accepted: April 18, 2008
Published: May 14, 2008

Citation
Amber L. Bullington, Brian T. Lantz, Martin M. Fejer, and Robert L. Byer, "Modal frequency degeneracy in thermally loaded optical resonators," Appl. Opt. 47, 2840-2851 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-15-2840

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