Journal
ELECTRONICS LETTERS
Volume 40, Issue 8, Pages 470-472Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el:20040298
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A ytterbium-doped fibre laser with up to I kW of continuous-wave output power at 1.09 mum with a slope efficiency of 80% and a good beam quality (M-2 = 3.4) is reported. The fibre was pumped by two diode-stack sources launched through opposite ends. No undesirable roll-over was observed in output power with increasing pump power.
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