Low phase noise self-injection-locked diode laser with a high-Q fiber resonator: model and experiment

Safia Mohand Ousaid (1) , Germain Bourcier (1) , Arnaud Fernandez (1) , Olivier Llopis (1) , Julien Lumeau (2) , Antonin Moreau (3) , Thomas Bunel (4) , Matteo Conforti (5, 6) , Arnaud Mussot (4) , Vincent Crozatier (7) , Stéphane Balac (8)

1 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications
2 RCMO - RCMO
3 FRESNEL - Institut FRESNEL
4 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
5 Photonique - Photonique
6 IRCICA - Institut de Recherche sur les Composants logiciels et matériels pour l'Information et la Communication Avancé - UAR 3380
7 Thales Research and Technology [Palaiseau]
8 IRMAR - Institut de Recherche Mathématique de Rennes

Low phase noise and narrow linewidth lasers are achieved by implementing self-injection locking of a DFB laser on two distinct fiber Fabry-Perot resonators. More than 45 dB improvement of the laser phase or frequency noise is observed when the laser is locked. In both cases, a frequency noise floor below 1 Hz2/Hz is measured. The integrated linewidth of the best of the two lasers is computed to be in the range of 400 Hz and appears to be dominated by vibration noise close to the carrier. The results are then compared with a model based on the retro-injected power and the Q factors ratio between the DFB laser and the resonator. This straightforward model facilitates the extraction of the theoretical performance of these sources close to the carrier, a characteristic still hidden by vibration noise.

Domaines: Sciences de l'ingénieur [physics]

Safia Mohand Ousaid, Germain Bourcier, Arnaud Fernandez, Olivier Llopis, Julien Lumeau, et al.. Low phase noise self-injection-locked diode laser with a high-Q fiber resonator: model and experiment. Optics Letters, In press. ⟨hal-04522525⟩