title: A 41-W ZnGeP₂ optical parametric oscillator pumped by a Q-switched Ho:YAG laser.
abstract: We reported a high-power ZnGeP₂ (ZGP) optical parametric oscillator (OPO) pumped by a Q-switched Ho:YAG laser. The maximum output power of the ZGP OPO was 41.2 W at 107.0 W incident Ho pump power, corresponding to a slope efficiency of 44.6%. The ZGP OPO produced 16-ns mid-IR pulse laser in the 3.74-3.98 μm and 4.38-4.76 μm spectral regions simultaneously. The beam quality was measured to be M²<4.37. The continuous wave maximum average output power of the Ho:YAG laser was 128 W, corresponding to a slope efficiency of 65.8%.
authors.forename: Bao-Quan
authors.initials: BQ
authors.lastname: Yao
authors.forename: Ying-Jie
authors.initials: YJ
authors.lastname: Shen
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Duan
authors.forename: Tong-Yu
authors.initials: TY
authors.lastname: Dai
authors.forename: You-Lun
authors.initials: YL
authors.lastname: Ju
authors.forename: Yue-Zhu
authors.initials: YZ
authors.lastname: Wang