Direct Observation of Broadband Coating Thermal Noise in a Suspended Interferometer

Abstract

We have directly observed broadband thermal noise in silica/tantala coatings in a high-sensitivity Fabry-Perot interferometer. Our result agrees well with the prediction based on indirect, ring-down measurements of coating mechanical loss, validating that method as a tool for the development of advanced interferometric gravitational-wave detectors.

Final version synchronized with publication in Phys. Lett. A

References in corpus (4)

• Internal thermal noise in the LIGO test masses : a direct approach
• Thermal noise in interferometric gravitational wave detectors due to dielectric optical coatings
• Thermodynamical fluctuations and photo-thermal shot noise in gravitational wave antennae
• Mechanical Loss in Tantala/Silica Dielectric Mirror Coatings

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