title: Room temperature single longitudinal mode laser output at 1645 nm from a laser-diode pumped Er:YAG nonplanar ring oscillator.
abstract: We report on a monolithic 1645 nm Er:YAG nonplanar ring oscillator (NPRO) resonantly pumped by a fiber-coupled laser diode. In the experiment, an up to 550 mW single frequency laser output at 1645.2 nm was obtained, corresponding to a slope efficiency of 19.1% and an absolute efficiency of 6.0%. The beam quality M2 was measured to be 2.1 at the highest output power.
authors.affiliation: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, 150080, China. yaobq08@hit.edu.cn
authors.forename: B Q
authors.initials: BQ
authors.lastname: Yao
authors.forename: X
authors.initials: X
authors.lastname: Yu
authors.forename: X L
authors.initials: XL
authors.lastname: Liu
authors.forename: X M
authors.initials: XM
authors.lastname: Duan
authors.forename: Y L
authors.initials: YL
authors.lastname: Ju
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Wang
mesh_terms: D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D009991:Oscillometry / Q000295:instrumentation*; D013696:Temperature