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arXiv · 2505.03416

Observation of resonant doublet and variable finesse in a tabletop meter-scale linear three-mirror cavity

Paul Stevens·Pierre-Emmanuel Bonningues·Théo Lesieur·François Glotin·Vincent Loriette·Manuel Andia·Angélique Lartaux-Vollard·Nicolas Leroy·Aymeric van de Walle
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Abstract

Fabry-Perot cavities are widely used in current gravitational-wave detectors. In particular, they play a key role in frequency-dependent squeezing systems, enabling broadband quantum noise reduction. However, their ability to precisely control squeezing properties may be insufficient for the next generation of detectors. In this context, theoretical studies on linear three-mirror cavities have revealed promising features, such as resonance peak splitting and their equivalence to two-mirror cavities with variable finesse. In this paper, we report experimental observations of both the resonant doublet and variable finesse using a meter-scale implementation of a linear three-mirror cavity.

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Paul Stevens, Pierre-Emmanuel Bonningues, Théo Lesieur, François Glotin, Vincent Loriette, Manuel Andia, Angélique Lartaux-Vollard, Nicolas Leroy, Aymeric van de Walle. 2025-05-06. Observation of resonant doublet and variable finesse in a tabletop meter-scale linear three-mirror cavity. https://arxiv.org/abs/2505.03416

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