Delay-induced instability in phase-locked dual-polarization distributed-feedback fiber lasers

Marie Guionie (1) , Marco Romanelli (1) , Aurélien Thorette (1) , Anthony Carré (1) , Emmanuel Pinsard (2) , Laurent Lablonde (2) , Benoît Cadier (2) , Mehdi Alouini (1) , Marc Vallet (1) , Marc Brunel (1)

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

We study experimentally and theoretically a dual-polarization fiber laser submitted to time-delayed frequency-shifted optical feedback. In addition to the usual frequency-locking regime that is expected when the frequency shift is close to the polarization beat frequency, we observe at high pumping rates a dynamical pulsing regime inside the locking range. This regime is experimentally evidenced in a full-fibered experiment based on an erbium-doped distributed-feedback fiber laser in which polarization beat frequency is about 1 GHz. A rate-equation model including the frequency-shifted feedback term reproduces well the experimental bifurcation maps, provided that both the time delay and a phase-amplitude coupling parameter (α factor) are taken into account. The impact on microwave-photonics applications is discussed.

Mots clés: Laser dynamics; Fiber laser; Dual-frequency

Domaines: Physique [physics]; Optique [physics.optics]

Marie Guionie, Marco Romanelli, Aurélien Thorette, Anthony Carré, Emmanuel Pinsard, et al.. Delay-induced instability in phase-locked dual-polarization distributed-feedback fiber lasers. Physical Review A, 2020, 101 (4), pp.043843. ⟨10.1103/PhysRevA.101.043843⟩. ⟨hal-02565340⟩