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Cryogenic measurements of mechanical loss of high-reflectivity coating and estimation of thermal noise

Abstract : We report on low-frequency measurements of the mechanical loss of a high-quality (transmissivity T<5 ppm at λ0=1064 nm, absorption loss <0.5 ppm) multilayer dielectric coating of ion-beam-sputtered fused silica and titanium-doped tantala in the 10-300 K temperature range. A useful parameter for the computation of coating thermal noise on different substrates is derived as a function of temperature and frequency.
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http://hal.in2p3.fr/in2p3-00919923
Contributor : Dominique Girod <>
Submitted on : Tuesday, December 17, 2013 - 3:08:58 PM
Last modification on : Thursday, November 21, 2019 - 2:03:43 AM

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M. Granata, K. Craig, G. Cagnoli, C. Carcy, W. Cunningham, et al.. Cryogenic measurements of mechanical loss of high-reflectivity coating and estimation of thermal noise. Optics Letters, Optical Society of America, 2013, 38, pp.5268-5271. ⟨10.1364/OL.38.005268⟩. ⟨in2p3-00919923⟩

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