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Highly efficient 1.064 μm upconversion pumped 1.47 μm thulium doped fluoride fibre laser

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3 Author(s)
Percival, R.M. ; BT&D Technol. Ltd., Ipswich ; Szebesta, D. ; Williams, J.R.

Results are presented on a 1064 mm upconversion pumped thulium doped fluoride fibre laser operating on the 3F4- 3H4 transition around 1.47 μm. A minimum threshold of 8.7 mW (3.6 mW absorbed), and a maximum slope efficiency of 58% (80% photon conversion efficiency), with respect to launched pump power has been observed. In addition a maximum gain efficiency of 0.22 dB/mW has been demonstrated

Published in:

Electronics Letters  (Volume:30 ,  Issue: 13 )