10-W-level diode-pumped compact 2.78 microm ZBLAN fiber laser.

  title={10-W-level diode-pumped compact 2.78 microm ZBLAN fiber laser.},
  author={Xiushan Zhu and Ravi Jain},
  journal={Optics letters},
  volume={32 1},
We report on >9W transverse-fundamental-mode CW output near 3 mum from a 4m heavily erbium-doped ZBLAN double-clad fiber laser pumped by a collimated 100 W 975 nm laser diode array. The pump threshold of the fiber laser was about 1W, and the slope efficiency was 21.3%. The peak wavelength of free running was about 2708 nm at low pump power and moved to around 2785 nm at high pump power. Output of 9W was obtained when the launched pump power was 42.8W. The output, however, fluctuated intensively… CONTINUE READING
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