23 December 2004 Thulium-ytterbium co-doped fiber laser with 75 W of output power at 2 μm
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We report power-scaling of an ytterbium-sensitized thulium-doped silica fiber laser generating up to 75 W of output power in the 2 μm wavelength range when cladding-pumped by a 975 nm diode stack. The slope efficiency is 32% with respect to launched pump power and the beam quality factor (M2) is 1.3. We also investigate the characteristics of this fiber in a tunable laser configuration, operating at ~10 W of output power with the tuning range extended from 2000 to 2080 nm at a launched pump power of 40 W.
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Yoonchan Jeong, Pascal Dupriez, Jayanta K. Sahu, Johan Nilsson, Deyuan Shen, W. Andrew Clarkson, Stuart D. Jackson, "Thulium-ytterbium co-doped fiber laser with 75 W of output power at 2 μm", Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); doi: 10.1117/12.578727; https://doi.org/10.1117/12.578727

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