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Article Dans Une Revue Optics Letters Année : 2009

Ultralow frequency noise laser by locking to an optical fiber delay line

Résumé

We report the frequency stabilization of an erbium-doped fiber distributed-feedback laser using an all-fiber based Michelson interferometer of large arm imbalance. The interferometer uses a 1 km SMF-28 optical fiber spool and an acousto optic modulator allowing heterodyne detection. The frequency noise power spectral density is reduced by more than 40 dB for Fourier frequencies ranging from 1 Hz to 10 kHz, corresponding to a level well below 1 Hz^2/Hz over the whole range. It reaches 10^{-2} Hz^2/Hz at 1 kHz. Between 40 Hz and 30 kHz, the frequency noise is shown to be comparable to the one obtained by Pound-Drever-Hall locking to a high finesse Fabry-Perot cavity. Locking to a fiber delay line could consequently represent a reliable, simple and compact alternative to cavity stabilization for short term linewidth reduction.
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Dates et versions

hal-00362989 , version 1 (16-10-2014)

Identifiants

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Fabien Kéfélian, Haifeng Jiang, Pierre Lemonde, Giorgio Santarelli. Ultralow frequency noise laser by locking to an optical fiber delay line. Optics Letters, 2009, 34, pp.914-916. ⟨10.1364/OL.34.000914⟩. ⟨hal-00362989⟩
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