In this study, we presented a high-power widely tunable all-fiber narrowband superfluorescent fiber source (SFS) by employing two tunable bandpass filters and three amplifier stages. More than 935 W output power is achieved, with a slope efficiency of >75% and a beam quality factor of M²=1.40. The tuning of the narrowband SFS ranges from ∼1045 nm to ∼1085 nm with a full width at half maximum linewidth of less than 0.71 nm. The tunable narrowband SFS stably operates without the influence of parasitic oscillation and self-pulsing effects under maximum power. To the best of our knowledge, this study is the first to demonstrate a widely tunable all-fiber narrowband SFS around 1 µm wavelength region with output power reaching kilowatt-level.

中文翻译：

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具有40 nm调谐范围的千瓦级可调谐全光纤窄带超荧光纤维光源

在这项研究中，我们通过采用两个可调带通滤波器和三个放大器级，提出了一种高功率，广泛可调的全光纤窄带超荧光光纤源（SFS）。实现了超过935 W的输出功率，斜率效率> 75％，光束质量因数M ² = 1.40。窄带SFS的调谐范围为〜1045 nm至〜1085 nm，半线宽的全宽小于0.71 nm。在最大功率下，可调谐窄带SFS稳定运行而不受寄生振荡和自脉冲效应的影响。据我们所知，该研究是第一个展示可调谐的全光纤窄带SFS，波长范围约为1 µm，输出功率达到千瓦级。