A room-temperature watt-level continuous-wave-output power mid-infrared fiber laser operating at $\lambda\sim 3\; \unicode{x00B5}{\rm m}$ is demonstrated using a ${{\rm Ho}^{3 +}}/{{\rm Pr}^{3 +}}$ co-doped ${{\rm AlF} _3}$ based glass fiber as a gain fiber. This fixed-wavelength laser had maximum output power of 1.13 W with a slope efficiency of 10.3% and a long-term operating stability of ${\gt}{40}\;{\min }$ without any additional packaging or active thermal management. A fiber laser with tunability from 2.842 to 2.938 µm showed a maximum output power of 110 mW.

中文翻译：

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Ho ³⁺ / Pr ³⁺共掺杂的AlF ₃基玻璃纤维中的室温瓦特级和可调式〜3 µm激光器

室温瓦特级连续波输出功率的中红外光纤激光器，工作在\\ lambda \ sim 3 \; \ unicode {x00B5} {\ rm m} $使用$ {{\ rm Ho} ^ {3 +}} / {{\ rm Pr} ^ {3 +}} $共掺杂的$ {{\ rm AlF} _3} $基玻璃纤维作为增益纤维。这款固定波长激光器的最大输出功率为1.13 W，斜率效率为10.3％，长期运行稳定性为$ {\ gt} {40} \; {\ min} $，无需任何额外的封装或有效的热管理。可调范围为2.842至2.938 µm的光纤激光器显示的最大输出功率为110 mW。