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

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arxiv 2504.18374 v2 pith:MQV45SBL submitted 2025-04-25 physics.optics

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

classification physics.optics
keywords opticalinterferometermichelsonsignal-recycledspringachieveamplificationavenue
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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