Controlling kilometre-scale interferometric detectors for gravitational wave astronomy: Active phase noise cancellation using EOMs

N. Arnaud (1) , L. Balembois (1) , M.A. Bizouard (1) , V. Brisson (1) , J. Casanueva (1) , F. Cavalier (1) , M. Davier (1) , V. Frey (1) , P. Hello (1) , D. Huet (1) , N. Leroy (1) , V. Loriette (2) , I. Maksimovic (2) , F. Robinet (1)

1 LAL - Laboratoire de l'Accélérateur Linéaire
2 ESPCI Paris - Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris

The second generation of Gravitational waves detectors are kilometric Michelson interferometers with additional recycling Fabry–Perot cavities on the arms and ​the addition of two more recycling cavities to enhance their sensitivity, with the particularity that all the mirrors are suspended. In order to control them a new technique, based on the use of auxiliary lasers, has been developed to bring the interferometer to its working point, with all the cavities on their resonance, in an adiabatic way. The implementation of this technique in Advanced Virgo is under preparation and the propagation of a stable laser through a 3-km optical fibre is one of the most problematic issues. A new technique of active phase noise cancellation based on the use of Electro Optical Modulators has been developed, and a first prototype has been successfully tested.

Mots clés: Gravitational waves detector; Advanced Virgo; Optic fibre; Phase noise

Domaines: Instrumentations et Détecteurs [physics.ins-det]

N. Arnaud, L. Balembois, M.A. Bizouard, V. Brisson, J. Casanueva, et al.. Controlling kilometre-scale interferometric detectors for gravitational wave astronomy: Active phase noise cancellation using EOMs. 14th Vienna Conference on Instrumentation, Feb 2016, Vienna, Austria. pp.347-349, ⟨10.1016/j.nima.2016.06.049⟩. ⟨hal-01554794⟩