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

Kai Hu, Irina V. Kabakova, Thomas F. S. Büttner, Simon Lefrancois, Darren D. Hudson, Sailing He, and Benjamin J. Eggleton

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Abstract

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.

© 2014 Optical Society of America

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