Beat note stabilization in dual-polarization DFB fiber lasers by an optical phase-locked loop

M. Guionie (1) , Ludovic Frein (1) , Anthony Carré (1) , Goulc'Hen Loas (1) , François Bondu (1) , Emmanuel Pinsard (2) , Laurent Lablonde (2) , Benoît Cadier (2) , M. Alouini (1) , Marco Romanelli (1) , Marc Vallet (1) , Marc Brunel (1)

1 FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON
2 iXBlue Photonics

A fully fibered microwave-optical source at 1.5 µm is studied experimentally. It is shown that the beat note between two orthogonally polarized modes of a distributed-feedback fiber laser can be efficiently stabilized using an optical phase-locked loop. The pump-power-induced birefringence serves as the actuator. Beat notes at 1 GHz and 10 GHz are successfully stabilized to a reference synthesizer, passing from the 3 kHz free-running linewidth to a stabilized sub-Hz linewidth, with a phase noise as low as-75 dBc/Hz at 100 Hz offset from the carrier. Such dual-frequency stabilized lasers could provide compact integrated components for RF and microwave photonics applications.

Domaines: Optique [physics.optics]

M. Guionie, Ludovic Frein, Anthony Carré, Goulc'Hen Loas, François Bondu, et al.. Beat note stabilization in dual-polarization DFB fiber lasers by an optical phase-locked loop. Optics Express, 2018, 26 (3), pp.3483-3488. ⟨10.1364/OE.26.003483⟩. ⟨hal-01716235⟩