Titania-doped tantala/silica coatings for gravitational-wave detection

Details Titania-doped tantala/silica coatings for gravitational-wave detection Titania-doped tantala/silica coatings for gravitational-wave detection

2006-10-01

arxiv.org/abs/gr-qc/0610004v1

Class.Quant.Grav.24:405-416,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

10.1088/0264-9381/24/2/008

Reducing thermal noise from optical coatings is crucial to reaching the required sensitivity in next generation interferometric gravitational-waves detectors. Here we show that adding TiO$_2$ to Ta$_2$O$_5$ in Ta$_2$O$_5$/SiO$_2$ coatings reduces the internal friction and in addition present data confirming it reduces thermal noise. We also show that TiO$_2$-doped Ta$_2$O$_5$/SiO$_2$ coatings are close to satisfying the optical absorption requirements of second generation gravitational-wave detectors.

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