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Optomechanical parametric instabilities simulation in Advanced Virgo

Abstract : Increasing the laser power is essential to improve the sensitivity of interferometric gravitational wave detectors. However, optomechanical parametric instabilities can set a limit to that power. It is of major importance to understand and characterize the many parameters and effects that influence these instabilities. We perform simulations for the Advanced Virgo interferometer (O3 configuration). In particular we compute mechanical modes losses by combining both on-site measurements and finite element analysis. We also study the influence on optical modes and parametric gains of mirror finite size effects, and mirror deformations due to thermal absorption. We show that these effects play an important role if transverse optical modes of order higher than four are involved in the instability process.
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https://hal.archives-ouvertes.fr/hal-03146100
Contributor : Thibaut Jacqmin <>
Submitted on : Thursday, February 18, 2021 - 5:54:38 PM
Last modification on : Sunday, February 21, 2021 - 3:21:55 AM

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  • HAL Id : hal-03146100, version 1
  • ARXIV : 2102.11070

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David Cohen, Annalisa Allocca, Gilles Bogaert, Paola Puppo, Thibaut Jacqmin. Optomechanical parametric instabilities simulation in Advanced Virgo. 2021. ⟨hal-03146100⟩

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