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Efficient upconversion pumping at 1.064 mu m Tm3+-doped fluoride fibre laser operating around 1.47 mu m

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4 Author(s)
Komukai, T. ; NTT Opt. Cable Syst. Lab., Ibaraki, Japan ; Yamamoto, T. ; Sugawa, T. ; Miyajima, Y.

1.064 mu m upconversion pumping was used to operate a highly efficient CW and Q-switched thulium (Tm3+)-doped fluoride fibre laser at around 1.47 mu m. The maximum CW output power was 100 mW for a launched pump power of 570 mW. The threshold power was 200 mW, the slope efficiency 27% and the wavelength width 20 nm. A peak power of 70 W was generated for Q-switching at a launched pump power of 300 mW.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 9 )