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Article Dans Une Revue Optics Express Année : 2023

High speed, high power 2D beam steering for mitigation of optomechanical parametric instability in gravitational wave detectors

Résumé

In this paper we propose a novel strategy to control optomechanical parametric instability (PI) in gravitational wave (GW) detectors, based on radiation pressure. The fast deflection of a high power beam is the key element of our approach. We built a 2D deflection system based on a pair of acousto-optic modulators (AOMs) that combines high rapidity and large scan range. As fast frequency switching configurable AOM driver we used an Universal Software Radio Peripheral (USRP) combined with a high performance personal computer (PC). In this way we demonstrate a 2D beam steering system with flat efficiency over the whole scan range and with a transition time of 50 ns between two arbitrary consecutive deflection positions for a beam power of 3.6 W.
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Dates et versions

hal-03553933 , version 1 (15-02-2024)

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Thomas Harder, Margherita Turconi, Rémi Soulard, Walid Chaibi. High speed, high power 2D beam steering for mitigation of optomechanical parametric instability in gravitational wave detectors. Optics Express, 2023, 31 (2), pp.1486-1500. ⟨10.1364/OE.454387⟩. ⟨hal-03553933⟩
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