title: CW-lasing and amplification in Tm(3+)-doped photonic crystal fiber rod.
abstract: We report lasing and amplification in a rod type thulium-doped photonic crystal fiber with 80 μm core diameter. The rod is pumped with a 793 nm laser diode and produces more than 20 W output power at a beam quality M(2)<1.3. The laser/amplifier has a slope efficiency of 27.8%/20.1% relative to absorbed pump power with a lasing threshold at 28.6 W. The output wavelength in the lasing configuration can be tuned over 180 nm from 1810-1990 nm.
authors.affiliation: CREOL, The College of Optics and Photonics, Orlando, Florida 32816, USA. christian.gaida@uni‑jena.de
authors.forename: Christian
authors.initials: C
authors.lastname: Gaida
authors.forename: Pankaj
authors.initials: P
authors.lastname: Kadwani
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