期刊
OPTICS LETTERS
卷 33, 期 4, 页码 402-404出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.33.000402
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- Engineering and Physical Sciences Research Council [EP/C515226/1, GR/T19889/01] Funding Source: researchfish
Laser emission in the range of 1.88-1.99 mu m from a Tm3+-doped tellurite fiber is demonstrated when pumped with a diode-pumped Er3+/Yb3+-doped silica fiber laser operating at 1.57-1.61 mu m. This pump source excites the Tm3+ ions directly into the F-3(4) upper laser level and yields an output power of 280 mW with a slope efficiency of 76% in a 99%-12% laser cavity arrangement and a 32 cm long fiber. This result is very close to the Stokes efficiency limit of similar to 80%. This is, to the authors' knowledge, the first demonstration of high efficiency lasing in a tellurite fiber at wavelengths longer than 1.56 mu m. (C) 2008 Optical Society of America.
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