title: Watt-level short-length holmium-doped ZBLAN fiber lasers at 1.2  μm.
abstract: In-band core-pumped Ho3+-doped ZBLAN fiber lasers at the 1.2 μm region were investigated with different gain fiber lengths. A 2.4 W 1190 nm all-fiber laser with a slope efficiency of 42% was achieved by using a 10 cm long gain fiber pumped at a maximum available 1150 nm pump power of 5.9 W. A 1178 nm all-fiber laser was demonstrated with an output power of 350 mW and a slope efficiency of 6.5%. High Ho3+ doping in ZBLAN is shown to be effective in producing single-frequency fiber lasers and short-length fiber amplifiers immune from stimulated Brillouin scattering.
authors.forename: Xiushan
authors.initials: X
authors.lastname: Zhu
authors.forename: Jie
authors.initials: J
authors.lastname: Zong
authors.forename: Kort
authors.initials: K
authors.lastname: Wiersma
authors.forename: R A
authors.initials: RA
authors.lastname: Norwood
authors.forename: Narasimha S
authors.initials: NS
authors.lastname: Prasad
authors.forename: Michael D
authors.initials: MD
authors.lastname: Obland
authors.forename: Arturo
authors.initials: A
authors.lastname: Chavez-Pirson
authors.forename: N
authors.initials: N
authors.lastname: Peyghambarian
mesh_terms: D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006695:Holmium / Q000737:chemistry* / Q000528:radiation effects; D007834:Lasers
chemical_list: D006695:Holmium