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Communication Dans Un Congrès Année : 2019

Mitigation of Parametric Instability

Résumé

A key action for enhancing the sensitivity of gravitational wave (GW) detectors based on laser interferometry is to increase the laser power. However, in such a high-power regime, a nonlinear optomechanical phenomenon called parametric instability (PI) leads to the amplification of the mirrors vibrational modes preventing the detector functioning. Thus this phenomenon limits the detectors maximum power and so its performances. Our group has started an experimental research program aiming at realizing a exible and active mitigation system, based on the radiation pressure applied by an auxiliary laser. A summary on the PI mitigation techniques will be presented, we will explain the working principle of the system that we are implementing and report about the first experimental results.

Dates et versions

hal-02362607 , version 1 (14-11-2019)

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Margherita Turconi, Thomas Harder, Rémi Soulard, Walid Chaibi. Mitigation of Parametric Instability. 54th Rencontres de Moriond on Gravitation, Mar 2019, La Thuile, Italy. ⟨hal-02362607⟩
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