18 November 2014 High-power continuous-wave ytterbium-doped fiber oscillator at 1018 nm
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Abstract
We have demonstrated a 1018 nm continuous wave fiber oscillator pumped by LDs operating at 976 nm. Three kinds of Ytterbium-doped dual-clad fibers, 15/130 μm fiber, 25/250 μm fiber and 30/250 μm fiber, are employed separately in the experiments. We achieve 67 W total output power with the 15/130 μm fiber for 100 W of pump power with a slope efficiency of 67%. And with the 25/250 μm fiber, 276 W total output power is generated for 372 W of pump power with a slope efficiency of 74%. In the end, 300 W output power with the slope efficiency of 81% is successfully achieved with the 30/250 μm fiber for 372 W of pump power. To the best of our knowledge, this is the highest output ever reached by a dual-clad fiber oscillator at this wavelength that ever reported in open detail.
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Renli Zhang, Yuhao Xue, Hong Zhang, Xiaobo Feng, Wupeng Gong, Yong Bi, "High-power continuous-wave ytterbium-doped fiber oscillator at 1018 nm", Proc. SPIE 9266, High-Power Lasers and Applications VII, 92661E (18 November 2014); doi: 10.1117/12.2071285; https://doi.org/10.1117/12.2071285
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