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Using a Passive Fiber Ring Cavity to Generate Shot-Noise-Limited Laser Light for Low-Power Quantum Optics Applications

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4 Author(s)
Malcolm B. Gray ; Australian Nat. Univ., Canberra ; Jong H. Chow ; Kirk McKenzie ; David E. McClelland

High-stability single-frequency fiber lasers typically exhibit relative intensity noise that is far in excess of shot noise across a broad frequency range extending from dc to many tens of megahertz. This excess noise precludes the use of these fiber lasers in a range of precision interferometry and quantum optics applications. We present experimental results using a passive, high Q, fiber ring resonator to filter out up to 26 dB of excess laser intensity noise, resulting in a stabilized laser output that reaches the shot-noise limit over most of its signal spectrum.

Published in:

IEEE Photonics Technology Letters  (Volume:19 ,  Issue: 14 )