Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apopt..45.1569h&link_type=abstract
Applied Optics IP, vol. 45, Issue 7, pp.1569-1574
Astronomy and Astrophysics
Astrophysics
25
Coatings, Thin Films, Other Properties, Astronomy And Astrophysics
Scientific paper
Gravitational waves are a prediction of Einstein's general theory of relativity. These waves are created by massive objects, like neutron stars or black holes, oscillating at speeds appreciable to the speed of light. The detectable effect on the Earth of these waves is extremely small, however, creating strains of the order of 10-21. There are a number of basic physics experiments around the world designed to detect these waves by using interferometers with very long arms, up to 4 km in length. The next-generation interferometers are currently being designed, and the thermal noise in the mirrors will set the sensitivity over much of the usable bandwidth. Thermal noise arising from mechanical loss in the optical coatings put on the mirrors will be a significant source of noise. Achieving higher sensitivity through lower mechanical loss coatings, while preserving the crucial optical and thermal properties, is an area of active research right now.
Armandula Helena
Black Eric
Cagnoli Gianpietro
Crooks David R. M.
Fejer Martin M.
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