High-efficiency 2  μm continuous-wave laser in laser diode-pumped Tm 3+ , La 3+ : CaF 2 single crystal

A Tm , La :  CaF single crystal was grown, and its spectral properties and laser performance were investigated. Under diode end-pumping, a continuous-wave laser has been demonstrated. The slope efficiency of up to 67.8% was first achieved in the co-doping crystal, which is close to twice the theoret...

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Published inOptics letters Vol. 43; no. 17; p. 4300
Main Authors Zhang, Zhen, Guo, Xinsheng, Wang, Jingya, Zhang, Cheng, Liu, Jie, Su, Liangbi
Format Journal Article
LanguageEnglish
Published United States 01.09.2018
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Summary:A Tm , La :  CaF single crystal was grown, and its spectral properties and laser performance were investigated. Under diode end-pumping, a continuous-wave laser has been demonstrated. The slope efficiency of up to 67.8% was first achieved in the co-doping crystal, which is close to twice the theoretical quantum efficiency. A maximum output power of 4.269 W and a broad tunable range of 192 nm were also obtained, indicating this system is a promising candidate for highly efficient ∼2  μm lasers.
ISSN:1539-4794
DOI:10.1364/OL.43.004300