Mode-hopping suppression in long Brillouin fiber laser with non-resonant pumping

Gwennaël Danion (1) , Ludovic Frein (1) , Denis Bacquet (2) , Grégoire Pillet (3) , Stéphanie Molin (3) , Loïc Morvan (3) , Guillaume Ducournau (4) , Marc Vallet (1) , Pascal Szriftgiser (2) , Mehdi Alouini (1)

1 IPR - Institut de Physique de Rennes
2 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
3 Thales Research and Technology [Palaiseau]
4 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520

We propose a reliable method for stabilizing narrow linewidth Brillouin fiber lasers with non-resonant pumping. Mode-hopping is suppressed by means of a phase-locked loop that locks the pump-Stokes detuning to a local radio-frequency (RF) oscillator. Stable single-mode operation of a 110-m-long Brillouin fiber laser oscillating at 1.55 mu m is demonstrated for several hours. The beat note between two independent Stokes waves presents a phase noise level of -60 dBc/Hz at 100 Hz with a -20 dB/decade slope, and a FWHM linewidth lower than 50 Hz. (C) 2016 Optical Society of America

Keywords: noise; frequency; generation; reduction

Domains: Physics [physics]

Gwennaël Danion, Ludovic Frein, Denis Bacquet, Grégoire Pillet, Stéphanie Molin, et al.. Mode-hopping suppression in long Brillouin fiber laser with non-resonant pumping. Optics Letters, 2016, 41 (10), pp.2362--2365. ⟨10.1364/OL.41.002362⟩. ⟨hal-01343401⟩