Dysprosium-doped silica fiber as saturable absorber for mid-infrared pulsed all-fiber lasers

Pascal Paradis (1) , Tommy Boilard (2) , Vincent Fortin (2) , Stanislaw Trzesien (3) , Michèle Ude (3) , Bernard Dussardier (3) , Réal Vallée (2) , Martin Bernier (2)

1 COPL - Center for Optics, Photonics and Lasers, Université Laval, Québec, Canada
2 COPL - Center for Optics, Photonics and Lasers
3 INPHYNI - Institut de Physique de Nice

We report on a mid-infrared Q-switched erbium-doped all-fiber laser using a dysprosium-doped silica fiber as saturable absorber for the first time in this wavelength range. Moreover, we demonstrate the use of a highly reflective chirped fiber Bragg grating written in a silica fiber as the input coupler for such lasers. This Q-switched all-fiber laser generates a stable pulse train centered at 2798 nm with a maximum average power of 670 mW at a repetition rate of 140 kHz with a pulse duration of 240 ns and a pulse energy of 4.9 µJ.

Mots clés: laser; mid-infrared; optical fiber; saturable absorber; erbium; dysprosium; Q-switch

Domaines: Optique / photonique

Pascal Paradis, Tommy Boilard, Vincent Fortin, Stanislaw Trzesien, Michèle Ude, et al.. Dysprosium-doped silica fiber as saturable absorber for mid-infrared pulsed all-fiber lasers. Optics Express, 2022, 30 (3), pp.3367-3378. ⟨10.1364/oe.448060⟩. ⟨hal-03537583⟩