15 W monolithic fiber laser at 3.55 µm

We report a dual-wavelength-pumped all-fiber continuous-wave (CW) laser operating at 3.55 µm that reached an output power of 14.9 W, which is, to the best of our knowledge, a record. The laser cavity, made of an erbium-doped fluoride fiber and bounded by two fiber Bragg gratings (FBGs), operates at...

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Bibliographic Details
Published in:Optics letters 2022-01, Vol.47 (2), p.289-292
Main Authors: Lemieux-Tanguay, Maxime, Fortin, Vincent, Boilard, Tommy, Paradis, Pascal, Maes, Frédéric, Talbot, Lauris, Vallée, Réal, Bernier, Martin
Format: Article
Language:English
Subjects:
Bragg gratings
Continuous fibers
Continuous radiation
Erbium
Fiber lasers
Laser outputs
Lasers
Optimization
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Summary:We report a dual-wavelength-pumped all-fiber continuous-wave (CW) laser operating at 3.55 µm that reached an output power of 14.9 W, which is, to the best of our knowledge, a record. The laser cavity, made of an erbium-doped fluoride fiber and bounded by two fiber Bragg gratings (FBGs), operates at an overall optical efficiency of 17.2% and a slope efficiency of 51.3% with respect to the 1976 nm launched pump power. The all-fiber design of the cavity not only allows for significant power scaling of the laser output, but also improves its long-term stability at high output power. The cavity design was set according to a numerical optimization that showed very good agreement with the experimental results.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.446769