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High-efficiency CW thulium-sensitised holmium-doped fluoride fibre laser operating at 2.04 mu m

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2 Author(s)

Laser oscillation at 2.04 mu m has been observed in a thulium-sensitised holmium doped singlemode fluorozirconate fibre. 52% slope efficiency and 250 mW output power were obtained with a pump at 0.82 mu m. Cross relaxation in thulium gives a pump quantum efficiency of 1.30.

Published in:

Electronics Letters  (Volume:27 ,  Issue: 17 )