Watt-level visible laser in double-clad Pr3+-doped fluoride fiber pumped by a GaN diode | Zendy

Esrom Kifle | Zendy; Florent Starecki | Zendy; Pavel Loiko | Zendy; Solenn Cozic | Zendy; Franck Joulain | Zendy; Thibaud Berthelot | Zendy; Thierry Georges | Zendy; Dragan Stojcevski | Zendy; Damien Deubel | Zendy; Patrice Camy | Zendy

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Watt-level visible laser in double-clad Pr³⁺-doped fluoride fiber pumped by a GaN diode

Author(s) -

Esrom Kifle,

Florent Starecki,

Pavel Loiko,

Solenn Cozic,

Franck Joulain,

Thibaud Berthelot,

Thierry Georges,

Dragan Stojcevski,

Damien Deubel,

Patrice Camy

Publication year - 2020

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.413673

Subject(s) - materials science , optics , diode , watt , fiber laser , laser , optoelectronics , doping , optical fiber , fluoride , power (physics) , physics , chemistry , inorganic chemistry , quantum mechanics

We report on a red praseodymium fiber laser delivering 1.07 W at 634.5 nm with a slope efficiency of 20.7% (versus the incident pump), a laser threshold of 0.55 W, and a single-mode output ( M x , y 2<1.1) in the quasi-continuous-wave regime. It is based on a 0.6 mol.% P r 3+ -doped ZBLAN double-clad fiber with a 5.5 µm core, a double D-shaped (diameters, 115/125 µm) inner cladding, and a length of 5.0 m. The fiber is pumped by a multimode 443 nm GaN diode. The laser design is optimized using a numerical model. The proposed concept is suitable for the development of diode-pumped high brightness watt-level visible praseodymium fiber lasers.

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