title: Lasing in thulium-doped polarizing photonic crystal fiber.
abstract: We describe lasing of a thulium-doped polarizing photonic crystal fiber. A 4 m long fiber with 50 μm diameter core, 250 μm diameter cladding, and d/Λ ratio of 0.18 was pumped with a 793 nm diode and produced a polarized output with a polarization extinction ratio (PER) of 15 dB and an M(2) of <1.15. An intracavity polarizer and half-wave plate minimally increased the PER to 16 dB. The output power had 35% slope efficiency relative to the absorbed pump power. The maximum cw output power was limited to 4 W due to the quantum defect heating of the fiber.
authors.affiliation: CREOL, The College of Optics and Photonics, Building 53 4000 Central Florida Boulevard, Orlando, Florida 32816, USA.
authors.forename: Norbert
authors.initials: N
authors.lastname: Modsching
authors.forename: Pankaj
authors.initials: P
authors.lastname: Kadwani
authors.forename: R Andrew
authors.initials: RA
authors.lastname: Sims
authors.forename: Lasse
authors.initials: L
authors.lastname: Leick
authors.forename: Jes
authors.initials: J
authors.lastname: Broeng
authors.forename: Lawrence
authors.initials: L
authors.lastname: Shah
authors.forename: Martin
authors.initials: M
authors.lastname: Richardson
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008027:Light; D013932:Thulium / Q000737:chemistry*
chemical_list: D013932:Thulium