Comptes Rendus
no. 9-10
Optomechanical issues in the gravitational wave detector Advanced VIRGO
[Phénomènes opto-mécaniques dans le détecteur dʼondes gravitationnelles Advanced VIRGO]
Walid Chaibi1  ; François Bondu2
1 Département ARTEMIS, Observatoire de la Côte dʼAzûr, CNRS, université de Nice Sophia Antipolis, boulevard de lʼObservatoire, 06304 Nice cedex, France
2 Institut de physique de Rennes, CNRS, université de Rennes 1, 35042 Rennes, France
Comptes Rendus. Physique, Volume 12 (2011) no. 9-10, pp. 888-897.

Dans lʼinterféromètre, Advanced VIRGO, seconde génération de lʼantenne gravitationnelle VIRGO, les effets opto-mécaniques seront dʼune importance capitale pour le fonctionnement global du système. En effet, afin de compenser les défauts de symétrie entre les deux bras du Michelson, les cavités optiques devront être désaccordés de manière dissymétrique. Ceci permettra de mettre en place un schéma de détection DC. Dans cet article, on démontre que même dans le cas dʼun faible désaccord, la puissance laser intra-cavité rend les effets de ressorts optiques suffisamment importants pour contraindre le contrôle de lʼinterféromètre et limiter sa sensibilité.

The next generation of the gravitational wave detector VIRGO, namely Advanced VIRGO, will feel an enhancement of optomechanical effects. In fact, it is planned that cavities will be antisymmetrically detuned to compensate symmetry defects between the two arms, which then allows DC detection. In this article, we show that even with slight detuning, the high intra-cavity power stored within the Fabry–Perot cavities makes optical spring effects important enough to constrain the detector adjustment procedure and to limit its sensitivity.

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DOI : 10.1016/j.crhy.2011.07.004
Keywords: Gravitational waves, Optical cavities, Optical spring, Radiation pressure noise
Mot clés : Ondes gravitationnelles, Cavités optiques, Ressort optique, Bruit de la pression de radiation
Walid Chaibi 1 ; François Bondu 2

1 Département ARTEMIS, Observatoire de la Côte dʼAzûr, CNRS, université de Nice Sophia Antipolis, boulevard de lʼObservatoire, 06304 Nice cedex, France
2 Institut de physique de Rennes, CNRS, université de Rennes 1, 35042 Rennes, France 
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Walid Chaibi; François Bondu. Optomechanical issues in the gravitational wave detector Advanced VIRGO. Comptes Rendus. Physique, Volume 12 (2011) no. 9-10, pp. 888-897. doi : 10.1016/j.crhy.2011.07.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.07.004/

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