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arxiv: gr-qc/0401034 · v2 · submitted 2004-01-09 · 🌀 gr-qc

Direct Observation of Broadband Coating Thermal Noise in a Suspended Interferometer

Eric D. Black , Akira Villar , Kyle Barbary , Adam Bushmaker , Jay Heefner , Seiji Kawamura , Fumiko Kawazoe , Luca Matone
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Sharon Meidt Shanti R. Rao Kevin Schulz Michael Zhang Kenneth G. Libbrecht
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keywords broadbandcoatinginterferometernoisethermaladvancedagreescoatings
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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.

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