35 W continuous-wave Ho:YAG single-crystal fiber laser. (2020)

• Record Type: Journal Article
• Authors: Zhao, Yongguang; Wang, Li; Chen, Weidong; Wang, Jianlei; Song, Qingsong; Xu, Xiaodong; Liu, Ying; Shen, Deyuan; Xu, Jun; Mateos, Xavier; Loiko, Pavel; Wang, Zhengping; Xu, Xinguang; Griebner, Uwe; Petrov, Valentin
• Is Part Of: High power laser science and engineering. Volume 8(2020)
• Publication Date: 2020
• Subjects: high-power laser, -- Ho:YAG, -- mid-IR laser, -- single-crystal fiber; High power lasers -- Periodicals; 621.366
• DOI: 10.1017/hpl.2020.25
• Languages: English
• ISSNs: 2095-4719

Abstract

Abstract : We report on a high-power Ho:YAG single-crystal fiber (SCF) laser inband pumped by a high-brightness Tm-fiber laser at 1908 nm. The Ho:YAG SCF grown by the micro-pulling-down technique exhibits a propagation loss of $0.05\pm 0.005~\text{cm}^{-1}$ at $2.09~\unicode[STIX]{x03BC}\text{m}$ . A continuous-wave output power of 35.2 W is achieved with a slope efficiency of 42.7%, which is to the best of our knowledge the highest power ever reported from an SCF-based laser in the 2 $\unicode[STIX]{x03BC}\text{m}$ spectral range.