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physics.optics2026
Cyclic-Quadrature Intracavity Signal Amplification for Gravitational-Wave Detectors
Kaido Suzuki, Ryo Iden, Ken-ichi Harada +1
The high-frequency sensitivity of laser-interferometric gravitational-wave detectors is limited by quantum shot noise. Increasing the circulating optical power reduces shot noise,…
physics.optics2025
Observation of an Optical Spring in a Robustly Controlled Signal-Recycled Michelson Interferometer
Kaido Suzuki, Ken-ichi Harada, Ryo Iden +4
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 multip…