In-vacuum Faraday isolation remote tuning

Year: 2010

Authors: Accadia T., Acernese F., Antonucci F., Aoudia S., Arun K.G., Astone P., Ballardin G., Barone F., Barsuglia M., Bauer Th S., Beker M.G., Bigotta S., Birindelli S., Bitossi M., Bizouard M.A., Blom M., Boccara C., Bondu F., Bonelli L., Bosi L., Braccini S., Bradaschia C., Brillet A., Brisson V., Budzynski R., Bulik T., Bulten H.J., Buskulic D., Cagnoli G., Calloni E., Campagna E., Canuel B., Carbognani F., Cavalier F., Cavalieri R., Cella G., Cesarini E., Chassande-Mottin E., Chincarini A., Cleva F., Coccia E., Colacino C.N., Colas J., Colla A., Colombini M., Corda C., Corsi A., Coulon J-P, Cuoco E., D’Antonio S., Dari A., Dattilo V., Davier M., Day R., De Rosa R., Del Prete M., Di Fiore L., Di Lieto A., Emilio M. Di Paolo, Di Virgilio A., Dietz A., Drago M., Fafone V., Ferrante I., Fidecaro F., Fiori I., Flaminio R., Fournier J-D, Franc J., Frasca S., Frasconi F., Freise A., Gammaitoni L., Garufi F., Gemme G., Genin E., Gennai A., Giazotto A., Gouaty R., Granata V., Greverie C., Guidi G., Heitmann H., Hello P., Hild S., Huet D., Jaranowski P., Kowalska I., Krolak A., La Penna P., Leroy N., Letendre N., Li T.G.F., Lorenzini M., Loriette V., Losurdo G., Mackowski J.-M., Majorana E., Man C. N., Mantovani M., Marchesoni F., Marion F., Marque J., Martelli F., Masserot A., Mitchel C., Milano L., Minenkov Y., Mohan M., Moreau J., Morgado N., Morgia A., Mosca S., Moscatelli V., Mours B., Neri I., Nocera F., Pagliaroli G., Palladino L., Palomba C., Paoletti F., Pardi S., Parisi M., Pasqualetti A., Passaquieti R., Passuello D., Persichetti G., Pichot M., Piergiovanni F., Pietka M., Pinard L., Poggiani R., Prato M., Prodi G.A., Punturo M., Puppo P., Rabaste O., Rabeling D.S., Rapagnani P., Re V., Regimbau T., Ricci F., Robinet F., Rocchi A., Rolland L., Romano R., Rosinska D., Ruggi P., Sassolas B., Sentenac D., Sturani R., Swinkeles B., Toncelli A., Tonelli M., Tournefier E., Travasso F., Trummer J., Vajente G., van den Brand J.F.J., van der Putten S., Vavoulidis M., Vedovato G., Verkindt D., Vetrano F., Vicere A., Vinet J-Y, Vocca H., Was M., Yvert M.

Autors Affiliation: EGO, I-56021 Cascina, Pi, Italy; Univ Savoie, Lab Annecy Le Vieux Phys Particules LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France; Univ Salerno, I-84084 Salerno, Italy; Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy; Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, F-06304 Nice, France; Univ Paris 11, LAL, CNRS, IN2P3, F-91898 Orsay, France; Ecole Super Phys & Chim Ind Ville Paris, CNRS, F-75005 Paris, France; Univ Paris 07, CEA DSM IRFU, CNRS,Observ Paris, UMR7164 IN2P3, Paris, France; Natl Inst Subatom Phys, NL-1009 DB Amsterdam, Netherlands; Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy; Univ Rennes 1, CNRS, Inst Phys Rennes, F-35042 Rennes, France; Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy; Univ Pisa, I-56127 Pisa, Italy; Ist Nazl Fis Nucl, Sez Perugia, I-6123 Perugia, Italy; Univ Warsaw, PL-00681 Warsaw, Poland; Warsaw Univ, Astron Observ, PL-00478 Warsaw, Poland; CAMK PAN, PL-00716 Warsaw, Poland; Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands; Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, Italy; Univ Urbino Carlo Bo, I-60129 Urbino, Italy; Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy; Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-67100 Rome, Italy; Univ Roma Tor Vergata, I-67100 Rome, Italy; Univ Roma La Sapienza, I-00185 Rome, Italy; Univ Siena, I-53100 Siena, Italy; Univ Perugia, I-6123 Perugia, Italy; Univ Aquila, I-67100 Laquila, Italy; Univ Padua, I-35131 Padua, Italy; CNRS, IN2P3, LMA, F-69622 Villeurbanne, France; Univ Birmingham, Birmingham B15 2TT, W Midlands, England; Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland; Bialystok Univ, PL-15424 Bialystok, Poland; IM PAN, PL-05400 Otwock, Poland; Ist Nazl Fis Nucl, Grp Coll Trento, I-38050 Povo, Trento, Italy

Abstract: In-vacuum Faraday isolators (FIs) are used in gravitational wave interferometers to prevent the disturbance caused by light reflected back to the input port from the interferometer itself. The efficiency of the optical isolation is becoming more critical with the increase of laser input power. An in-vacuum FI, used in a gravitational wave experiment (Virgo), has a 20 mm clear aperture and is illuminated by an almost 20 W incoming beam, having a diameter of about 5 mm. When going in vacuum at 10(-6) mbar, a degradation of the isolation exceeding 10 dB was observed. A remotely controlled system using a motorized lambda/2 waveplate inserted between the first polarizer and the Faraday rotator has proven its capability to restore the optical isolation to a value close to the one set up in air. c 2010 Optical Society of America

Journal/Review: APPLIED OPTICS

Volume: 49 (25)      Pages from: 4780  to: 4790

KeyWords: TERBIUM GALLIUM GARNET
DOI: 10.1364/AO.49.004780

Citations: 9
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