基于氟化铝基玻璃光纤的瓦级~3 μm激光

Watt-level ~3 μm laser in AlF₃-based glass fiber

摘要: 研究了基于Ho³⁺/Pr³⁺共掺AlF₃基玻璃单包层光纤的瓦级～3 μm激光。采用单模1150 nm光纤激光器泵浦上述增益光纤，得到了波长2.87 μm的激光输出，其最大输出功率为1.02 W，激光斜率效率为10.7%，输出激光的光束质量因子M²≈1.2。研究结果表明，AlF₃基玻璃光纤是一种潜在的可获得高功率中红外激光输出的增益介质。

Abstract: A mid-infrared fiber laser operating at λ≈3 μm is demonstrated using a Ho³⁺/Pr³⁺ co-doped AlF₃-based glass fiber as a gain fiber. Under 1150 nm single-mode fiber laser pumping, the fixed-wavelength laser had maximum output power of 1.02 W, a slope efficiency of 10.7%, and M²≈1.2. The results prove this type of fiber is a potential gain medium for more powerful mid-infrared fiber lasers.