Technology
Observation of resonant doublet and variable finesse in a tabletop meter-scale linear three-mirror cavity
Key Points
arXiv:2505.03416v2 Announce Type: replace 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.
arXiv:2505.03416v2 Announce Type: replace
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.