Different approaches to improve the wavefront of low-loss mirrors used in the Virgo gravitational wave antenna

Authors :: L. Pinard
L. Dognin
P. Ganau
Christine Michel
M. Morgue
B. Lagrange
J. M. Mackowski
Institut de Physique Nucléaire de Lyon (IPNL)
Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)
Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
VIRGO
Flores, Sylvie
Source :: Technical Digest, Optical Interference Coatings'98, Optical Interference Coatings'98, Jun 1998, Tucson, United States. pp.18-20, Applied Surface Science, Applied Surface Science, Elsevier, 1999, 151, pp.86-90
Publication Year :: 1999
Publisher :: Elsevier BV, 1999.
Abstract: Several experimental techniques have been developed and tested to improve the wavefront of low-loss mirrors used in the Virgo program. The most elaborated one, called `Corrective Coating Treatment', allows us to reach an R.M.S. wavefront of 1.5 nm at 633 nm on 100-mm diameter high reflectivity mirrors. The next development will be to make the same correction at 1064 nm, wavelength of the Virgo interferometer, on very large silica substrates (350 mm diameter).

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