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L'interféromètre Virgo :
propriétés optiques, stabilisation en fréquence du laser

Abstract : An interferometer with suspended mirrors converts gravitational waves, space-time metric perturbations, in photon time of flight variations between two inertial masses at rest.
I describe the laser frequency stabilization setup to measure these time of flight variations. The obtained relative stability, in-loop, is 1e-21 on a 100 ms timescale. I show that the specifications are met. I study the stability conditions for a system with multiple servo loops.
The Virgo optical resonant cavities are the elementary bricks to convert a gravitational wave. I study the properties of a Fabry-Perot cavity. I show how the properties can be measured in situ with the transfer function used to lock the cavity. Fabry-Perot cavities are reference oscillators. I list the possible perturbations that perturb the phase stability.
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Contributor : François Bondu <>
Submitted on : Monday, June 9, 2008 - 10:15:51 AM
Last modification on : Monday, October 12, 2020 - 11:10:13 AM
Long-term archiving on: : Tuesday, September 21, 2010 - 4:38:18 PM



  • HAL Id : tel-00284986, version 2



François Bondu. L'interféromètre Virgo :
propriétés optiques, stabilisation en fréquence du laser. Astrophysique [astro-ph]. Université Nice Sophia Antipolis, 2008. ⟨tel-00284986v2⟩



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