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arXiv · 2504.18374

Observation of an Optical Spring in a Robustly Controlled Signal-Recycled Michelson Interferometer

Kaido Suzuki·Ken-ichi Harada·Ryo Iden·Sotatsu Otabe·Kentaro Komori·Yuta Michimura·Kentaro Somiya
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Abstract

We present, to the best of our knowledge, the first demonstration of an optical spring in a signal-recycled Michelson interferometer without arm cavities. The setup utilizes multiple laser fields to achieve stable and precisely controllable detuning and incorporates a compliant suspension system comprising two double-spiral springs. These results support optical spring-enhanced interferometers with intracavity amplification, offering a promising avenue for improving high-frequency sensitivity in future gravitational-wave detectors.

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Kaido Suzuki, Ken-ichi Harada, Ryo Iden, Sotatsu Otabe, Kentaro Komori, Yuta Michimura, Kentaro Somiya. 2025-04-25. Observation of an Optical Spring in a Robustly Controlled Signal-Recycled Michelson Interferometer. https://doi.org/10.1364/oe.574126

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