BONDU , François

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...

Gravitational waves are deformations of space-time. The beating of the local clock of an inertial observer with the time given by photons travelling between two points is sensitive to these waves. Actual instruments consists in Michelson interferometers with Fabry-Perot cavities in the arms. The thermal noise of the mirror suspensions and of...

It is shown how the transfer function from frequency noise to a Pound-Drever-Hall signal for a Fabry-Perot cavity can be used to accurately measure cavity length, cavity linewidth, mirror curvature, misalignments, laser beam shape mismatching with resonant beam shape, and cavity impedance mismatching with respect to vacuum.

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...

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Class. Quantum Grav., vol. 21, n. 5, pp. S487-S492, 2004, 2004

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