Chen Maoni, Cao Jianqiu, Liu Aimin, Huang Zhihe, Pan Zhiyong, Chen Zilun, Chen Jinbao
Opt Lett. 2021 Nov 1;46(21):5340-5343. doi: 10.1364/OL.441789.
In this Letter, to the best of our knowledge, the first kilowatt monolithic Yb-doped fiber laser operating near 980 nm is demonstrated. The fiber laser is achieved with the help of an all-fiber amplifier fabricated with a 105/250-µ core/cladding-diameter double-cladding Yb-doped fiber. With 11-W seed light, about 1.11-kW output power was obtained with 65.3% slope efficiency. The center wavelength was around 978 nm with a 10-dB bandwidth of about 0.6 nm. About 34-dB suppression of 1030-nm amplified spontaneous emission was realized, and the output beam quality ( factor) was about 16.2 at maximum output power. Better beam quality can be expected by optimizing the seed light and active fiber. This work can provide significant guidance for the study and designation of high-power fiber lasers operating near 980 nm and other three-level fiber sources.
在本信函中，据我们所知，首次展示了工作在980nm附近的千瓦级单片掺镱光纤激光器。该光纤激光器借助由芯径/包层直径为105/250µm的双包层掺镱光纤制成的全光纤放大器实现。在11W种子光的情况下，获得了约1.11kW的输出功率，斜率效率为65.3%。中心波长约为978nm，10dB带宽约为0.6nm。实现了对1030nm放大自发辐射约34dB的抑制，在最大输出功率下输出光束质量（M²因子）约为16.2。通过优化种子光和有源光纤有望获得更好的光束质量。这项工作可为980nm附近高功率光纤激光器及其他三能级光纤源的研究与设计提供重要指导。
