The sensitivity of advanced gravitational wave interferometric antennas is limited by thermal noise in the reflective coatings of the cavity mir- rors. We formulated a strategy for designing min- imal noise coatings with prescribed transmittance at a given wavelength. Prototypes of our optimized coatings have been manufactured by the CNRS Lab- oratoire Materiaux Avances in Lyon, and their ther- mal noise power spectral density has been directly measured at Caltech, using a dedicated instrument (thermal noise interferometer). The measurements are in excellent agreement with our theoretical pre- dictions.
Direct Measurement of Brownian Noise in Prototype Optimized Mirror Coatings for LIGO
Pinto I. M;Pierro V;Galdi V;Principe M;
2012-01-01
Abstract
The sensitivity of advanced gravitational wave interferometric antennas is limited by thermal noise in the reflective coatings of the cavity mir- rors. We formulated a strategy for designing min- imal noise coatings with prescribed transmittance at a given wavelength. Prototypes of our optimized coatings have been manufactured by the CNRS Lab- oratoire Materiaux Avances in Lyon, and their ther- mal noise power spectral density has been directly measured at Caltech, using a dedicated instrument (thermal noise interferometer). The measurements are in excellent agreement with our theoretical pre- dictions.File in questo prodotto:
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