title: Narrow linewidth Yb-doped fiber laser at 1120 nm.
abstract: A 974 nm laser diode pumped 1120 nm ytterbium (Yb)-doped fiber laser with all fiber components has been experimentally demonstrated. The resonator is composed of a normal single-mode Yb-doped fiber 1 m long and a pair of fiber Bragg gratings. Up to 21.6 mW of continuous-wave output power is generated when the launched pump power is 161 mW with an optical-to-optical conversion efficiency of 13.4%. The central wavelength is 1120.89 nm with a linewidth as narrow as 0.02 nm. Additionally, a similar fiber laser with a 2 m long gain medium displays a broadened linewidth. The results of the two fiber lasers are compared and discussed in the paper.
authors.affiliation: School of Science, Shandong University of Technology, Zibo, China. liuxiaojuansd@163.com
authors.forename: Liu
authors.initials: L
authors.lastname: Xiaojuan
authors.forename: Fu
authors.initials: F
authors.lastname: Shenggui
authors.forename: Guo
authors.initials: G
authors.lastname: Liping
authors.forename: Han
authors.initials: H
authors.lastname: Kezhen