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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)
Gray, M.B. ; Australian Nat. Univ., Canberra ; Chow, J.H. ; McKenzie, K. ; McClelland, D.E.

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:

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