Thermo-optic noise in coated mirrors for high-precision optical measurements

Authors

M. Evans, S. Ballmer, M. Fejer, P. Fritschel, G. Harry, and G. Ogin

Abstract

Thermal fluctuations in the coatings used to make high reflectors are becoming significant noise sources in precision optical measurements and are particularly relevant to advanced gravitational-wave detectors. There are two recognized sources of coating thermal noise; mechanical loss and thermal dissipation. Thermal dissipation causes thermal fluctuations in the coating which produce noise via the thermoelastic and thermorefractive mechanisms. We treat these mechanisms coherently, give a correction for finite coating thickness, and evaluate the implications for Advanced LIGO.

Journal

Physical Review D

Volume

78

Number

10

Date

11/2008
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Evans PhysRev2008465.29 KB