Abstract
A Tm3+, La3+: CaF2 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 4.269W and a broad tunable range of 192nm were also obtained, indicating this system is a promising candidate for highly efficient ∼2 μm lasers.
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