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Proceedings Paper

Low-loss coatings for the VIRGO large mirrors
Author(s): F. Beauville; D. Buskulic; R. Flaminio; F. Marion; A. Masserot; L. Massonnet; B. Mours; F. Moreau; J. Ramonet; E. Tournefier; D. Verkindt; O. Veziant; M. Yvert; Regis Barille; Vincenzino Dattilo; Daniel Enard; Franco Frasconi; Alberto Gennai; Paolo La Penna; Magali Loupias; Federico Paoletti; L. Bracci; Giovanni Calamai; E. Campagna; G. Conforto; E. Cuoco; I. Fiori; G. Guidi; G. Losurdo; Fabrizio Martelli; Massimo Mazzoni; B. Perniola; Ruagero N. Stanga; Flavio Vetrano; A. Vicere; D. Babusci; Gianfranco Giordano; Jean-Marie Mackowski; Nazario Morgado; Laurent Pinard; Alban Remillieux; Fausto Acernese; Fabrizio Barone; Enrico Calloni; Rosario De Rosa; Luciano Di Fiore; Antonio Eleuteri; Leopoldo Milano; Ketevan Qipiani; Iolanda Ricciardi; G. Russo; Salvatore Solimeno; M. Varvella; Francois Bondu; Alain Brillet; Eric Chassande-Mottin; Frederic Cleva; T. Cokelaer; J.-P. Coulon; B. Dujardin; J.-D. Fournier; H. Heitmann; Catherine N. Man; F. Mornet; J. Pacheco; A. Pai; Herve Trinquet; J.-Y. Vinet; N. Arnaud; M. Barsuglia; M. A. Bizouard; V. Brisson; F. Cavalier; M. Davier; P. Hello; P. Heusse; S. Kreckelberg; A. Claude Boccara; Vincent Loriette; J. Moreau; V. Reita; P. Amico; L. Bosi; Luca Gammaitoni; M. Punturo; F. Travasso; H. Vocca; L. Barsotti; S. Braccini; C. Bradaschia; G. Cella; C. Corda; A. Di Virgilio; I. Ferrante; F. Fidecaro; Adalberto Giazotto; E. Majorana; L. Holloway; R. Passaquieti; D. Passuello; R. Poggiani; A. Toncelli; M. Tonelli; L. Brocco; S. Frasca; C. Palomba; P. Puppo; P. Rapagnani; F. Ricci
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Paper Abstract

The goal of the VIRGO program is to build a giant Michelson type interferometer (3 kilometer long arms) to detect gravitational waves. Large optical components (350 mm in diameter), having extremely low loss at 1064 nm, are needed. Today, the Ion beam Sputtering is the only deposition technique able to produce optical components with such performances. Consequently, a large ion beam sputtering deposition system was built to coat large optics up to 700 mm in diameter. The performances of this coater are described in term of layer uniformity on large scale and optical losses (absorption and scattering characterization). The VIRGO interferometer needs six main mirrors. The first set was ready in June 2002 and its installation is in progress on the VIRGO site (Italy). The optical performances of this first set are discussed. The requirements at 1064 nm are all satisfied. Indeed, the absorption level is close to 1 ppm (part per million), the scattering is lower than 5 ppm and the R.M.S. wavefront of these optics is lower than 8 nm on 150 mm in diameter. Finally, some solutions are proposed to further improve these performance, especially the absorption level (lower than 0.1 ppm) and the mechanical quality factor Q of the mirrors (thermal noise reduction).

Paper Details

Date Published: 25 February 2004
PDF: 10 pages
Proc. SPIE 5250, Advances in Optical Thin Films, (25 February 2004); doi: 10.1117/12.516431
Show Author Affiliations
F. Beauville, Lab. d' Annecy-le-vieux de Physique des Particles (France)
D. Buskulic, Lab. d' Annecy-le-vieux de Physique des Particles (France)
R. Flaminio, Lab. d' Annecy-le-vieux de Physique des Particles (France)
F. Marion, Lab. d' Annecy-le-vieux de Physique des Particles (France)
A. Masserot, Lab. d' Annecy-le-vieux de Physique des Particles (France)
L. Massonnet, Lab. d' Annecy-le-vieux de Physique des Particles (France)
B. Mours, Lab. d' Annecy-le-vieux de Physique des Particles (France)
F. Moreau, Lab. d' Annecy-le-vieux de Physique des Particles (France)
J. Ramonet, Lab. d' Annecy-le-vieux de Physique des Particles (France)
E. Tournefier, Lab. d' Annecy-le-vieux de Physique des Particles (France)
D. Verkindt, Lab. d' Annecy-le-vieux de Physique des Particles (France)
O. Veziant, Lab. d' Annecy-le-vieux de Physique des Particles (France)
M. Yvert, Lab. d' Annecy-le-vieux de Physique des Particles (France)
Regis Barille, European Gravitational Observatory (Italy)
Vincenzino Dattilo, European Gravitational Observatory (Italy)
Daniel Enard, European Gravitational Observatory (Italy)
Franco Frasconi, European Gravitational Observatory (Italy)
INFN (Italy)
Alberto Gennai, European Gravitational Observatory (Italy)
Paolo La Penna, European Gravitational Observatory (Italy)
Magali Loupias, European Gravitational Observatory (Italy)
Federico Paoletti, European Gravitational Observatory (Italy)
INFN (Italy)
L. Bracci, INFN (Italy)
Giovanni Calamai, INFN (Italy)
E. Campagna, INFN (Italy)
G. Conforto, INFN (Italy)
E. Cuoco, INFN (Italy)
I. Fiori, INFN (Italy)
G. Guidi, INFN (Italy)
G. Losurdo, INFN (Italy)
Fabrizio Martelli, INFN (Italy)
Massimo Mazzoni, INFN (Italy)
B. Perniola, INFN (Italy)
Ruagero N. Stanga, INFN (Italy)
Flavio Vetrano, INFN (Italy)
A. Vicere, INFN (Italy)
D. Babusci, INFN (Italy)
Gianfranco Giordano, INFN (Italy)
Jean-Marie Mackowski, SMA/INP4-Univ. Claude Bernard Lyon 1 (France)
Nazario Morgado, SMA/INP4-Univ. Claude Bernard Lyon 1 (France)
Laurent Pinard, SMA/INP4-Univ. Claude Bernard Lyon 1 (France)
Alban Remillieux, SMA/INP4-Univ. Claude Bernard Lyon 1 (France)
Fausto Acernese, INFN (Italy)
Fabrizio Barone, INFN (Italy)
Enrico Calloni, INFN (Italy)
Rosario De Rosa, INFN (Italy)
Luciano Di Fiore, INFN (Italy)
Antonio Eleuteri, INFN (Italy)
Leopoldo Milano, INFN (Italy)
Ketevan Qipiani, INFN (Italy)
Iolanda Ricciardi, INFN (Italy)
G. Russo, INFN (Italy)
Salvatore Solimeno, INFN (Italy)
M. Varvella, INFN (Italy)
Francois Bondu, Observatoire de la Cote d'Azur (France)
Alain Brillet, Observatoire de la Cote d'Azur (France)
Eric Chassande-Mottin, Observatoire de la Cote d'Azur (France)
Frederic Cleva, Observatoire de la Cote d'Azur (France)
T. Cokelaer, Observatoire de la Cote d'Azur (France)
J.-P. Coulon, Observatoire de la Cote d'Azur (France)
B. Dujardin, Observatoire de la Cote d'Azur (France)
J.-D. Fournier, Observatoire de la Cote d'Azur (France)
H. Heitmann, Observatoire de la Cote d'Azur (France)
Catherine N. Man, Observatoire de la Cote d'Azur (France)
F. Mornet, Observatoire de la Cote d'Azur (France)
J. Pacheco, Observatoire de la Cote d'Azur (France)
A. Pai, Observatoire de la Cote d'Azur (France)
Herve Trinquet, Observatoire de la Cote d'Azur (France)
J.-Y. Vinet, Observatoire de la Cote d'Azur (France)
N. Arnaud, LAL/IN2P3-Univ. de Paris-Sud (France)
M. Barsuglia, LAL/IN2P3-Univ. de Paris-Sud (France)
M. A. Bizouard, LAL/IN2P3-Univ. de Paris-Sud (France)
V. Brisson, LAL/IN2P3-Univ. de Paris-Sud (France)
F. Cavalier, LAL/IN2P3-Univ. de Paris-Sud (France)
M. Davier, LAL/IN2P3-Univ. de Paris-Sud (France)
P. Hello, LAL/IN2P3-Univ. de Paris-Sud (France)
P. Heusse, LAL/IN2P3-Univ. de Paris-Sud (France)
S. Kreckelberg, LAL/IN2P3-Univ. de Paris-Sud (France)
A. Claude Boccara, Ecole Superieure de Physique et de Chimie Industrielles (France)
Vincent Loriette, Ecole Superieure de Physique et de Chimie Industrielles (France)
J. Moreau, Ecole Superieure de Physique et de Chimie Industrielles (France)
V. Reita, Ecole Superieure de Physique et de Chimie Industrielles (France)
P. Amico, INFN (Italy)
L. Bosi, INFN (Italy)
Luca Gammaitoni, INFN (Italy)
M. Punturo, INFN (Italy)
F. Travasso, INFN (Italy)
H. Vocca, INFN (Italy)
L. Barsotti, INFN (Italy)
S. Braccini, INFN (Italy)
C. Bradaschia, INFN (Italy)
G. Cella, INFN (Italy)
C. Corda, INFN (Italy)
A. Di Virgilio, INFN (Italy)
I. Ferrante, INFN (Italy)
F. Fidecaro, INFN (Italy)
Adalberto Giazotto, INFN (Italy)
E. Majorana, INFN (Italy)
L. Holloway, INFN (Italy)
R. Passaquieti, INFN (Italy)
D. Passuello, INFN (Italy)
R. Poggiani, INFN (Italy)
A. Toncelli, INFN (Italy)
M. Tonelli, INFN (Italy)
L. Brocco, INFN (Italy)
S. Frasca, INFN (Italy)
C. Palomba, INFN (Italy)
P. Puppo, INFN (Italy)
P. Rapagnani, INFN (Italy)
F. Ricci, INFN (Italy)


Published in SPIE Proceedings Vol. 5250:
Advances in Optical Thin Films
Claude Amra; Norbert Kaiser; H. Angus Macleod, Editor(s)

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