title: 7.3 W of single-frequency output power at 2.09 mum from an Ho:YAG monolithic nonplanar ring laser.
abstract: Single-frequency output power of 7.3 W at 2.09 mum from a monolithic Ho:YAG nonplanar ring oscillator (NPRO) is demonstrated. Resonantly pumped by a Tm-doped fiber laser at 1.91 mum, the Ho:YAG NPRO produces 71% of slope efficiency with respect to absorbed pump power and nearly diffraction-limited output with a beam quality parameter of M(2) approximately 1.1.
authors.affiliation: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, China. Yaobq08@hit.edu.cn
authors.forename: Bao-Quan
authors.initials: BQ
authors.lastname: Yao
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Duan
authors.forename: Dan
authors.initials: D
authors.lastname: Fang
authors.forename: Yun-Jun
authors.initials: YJ
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Ke
authors.forename: You-Lun
authors.initials: YL
authors.lastname: Ju
authors.forename: Yue-Zhu
authors.initials: YZ
authors.lastname: Wang
authors.forename: Guang-Jun
authors.initials: GJ
authors.lastname: Zhao