Low-threshold Brillouin laser at 2 μm based on suspended-core chalcogenide fiber.

@article{Hu2014LowthresholdBL,
  title={Low-threshold Brillouin laser at 2 $\mu$m based on suspended-core chalcogenide fiber.},
  author={Kai Hu and Irina V. Kabakova and Thomas F. S. B{\"u}ttner and Simon Lefrançois and Darren D. Hudson and Sailing He and Benjamin J. Eggleton},
  journal={Optics letters},
  year={2014},
  volume={39 16},
  pages={
          4651-4
        }
}
We present, to the best of our knowledge, the first demonstration of a 2 μm Brillouin laser based on a thulium-doped fiber pump and a chalcogenide fiber. A short 1.5 m piece of suspended-core chalcogenide As38Se62 fiber is employed as a gain medium, taking advantage of its small effective mode area and high Brillouin gain coefficient. A record-low lasing threshold of 52 mW is achieved, which is about 10 times lower than previously demonstrated in silica fiber cavities. 
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