title: Low-threshold Brillouin laser at 2 μm based on suspended-core chalcogenide fiber.
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.
authors.forename: Kai
authors.initials: K
authors.lastname: Hu
authors.forename: Irina V
authors.initials: IV
authors.lastname: Kabakova
authors.forename: Thomas F S
authors.initials: TF
authors.lastname: Büttner
authors.forename: Simon
authors.initials: S
authors.lastname: Lefrancois
authors.forename: Darren D
authors.initials: DD
authors.lastname: Hudson
authors.forename: Sailing
authors.initials: S
authors.lastname: He
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton