Twin mirrors for laser interferometric gravitational-wave detectors |
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Authors: | Sassolas Benoît Benoît Quentin Flaminio Raffaele Forest Danièle Franc Janyce Galimberti Massimo Lacoudre Aline Michel Christophe Montorio Jean-Luc Morgado Nazario Pinard Laurent |
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Affiliation: | Laboratoire des Matériaux Avancés, CNRS/IN2P3, 7 Avenue Pierre de Coubertin, 69622 Villeurbanne Cedex, France. b.sassolas@lma.in2p3.fr |
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Abstract: | Gravitational-wave detectors such as Virgo and the laser interferometric gravitational-wave observatory (LIGO) use a long-baseline Michelson interferometer with Fabry-Perot cavities in the arms to search for gravitational waves. The symmetry between the two Fabry-Perot cavities is crucial to reduce the interferometer's sensitivity to the laser amplitude and frequency noise. To this purpose, the transmittance of the mirrors in both cavities should be as close as possible. This paper describes the realization and the characterization of the first twin large low-loss mirrors with transmissions differing by less than 0.01%. |
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