Journal
OPTICS LETTERS
Volume 34, Issue 21, Pages 3313-3315Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.003313
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Funding
- Canadian Institute for Photonic Innovations (CIPI)
- Ministere du Developpement Economique, de l'Innovation et de l'Exportation (MDEIE)
- Fonds Quebecois de Recherche sur la Nature et les Technologies (FQRNT)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Foundation for Innovation (CFI)
- Le Verre Fluore
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We report what we believe is the first demonstration of laser emission at 2.94 mu m in an erbium-doped fluoride fiber laser. The low-loss all-fiber Fabry-Perot laser cavity was formed by two fiber Bragg gratings of 90% and 15% reflectivities in a 6.6 m, 7 mol. % Er-doped double-clad fiber. A maximum cw output power of 5.2 W was measured, which is to our knowledge the highest reported to date for a diode-pumped laser at this wavelength. A coreless endcap was fused at the output fiber end to prevent its deterioration at high output powers. Our results, including the slope efficiency of 26.6% with respect to launched pump power, suggest that erbium could be a better alternative than holmium in the search for a replacement for the flashlamp-pumped Er:YAG at 2.94 mu m. (C) 2009 Optical Society of America
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