Abstract We report the generation of 240 nJ, robust pulses at 1.5 μm by inserting the hafnium sulfide (HfS2) into the compact Er-doped fiber (EDF) laser. The multilayer HfS2 nanosheets prepared by liquid exfoliation was experimentally studied as a good performance saturable absorber (SA) with the modulation depth (ΔT) of 11.32%. The slope efficiency of fiber laser is as high as 8.9%. Compared with recent reported works, our experimental results show better comprehensive performance. This work demonstrates that HfS2 with prominent nonlinear saturable absorption property could be used as a promising candidate to advance the development of nonlinear optics.

中文翻译：

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用于大能量被动调Q光纤激光器的硫化铪纳米片

摘要 我们报告了通过将硫化铪 (HfS2) 插入紧凑型掺铒光纤 (EDF) 激光器中，在 1.5 μm 处产生 240 nJ 的稳健脉冲。通过液体剥离制备的多层 HfS2 纳米片作为一种性能良好的可饱和吸收体 (SA) 进行了实验研究，调制深度 (ΔT) 为 11.32%。光纤激光器的斜率效率高达8.9%。与最近报道的作品相比，我们的实验结果显示出更好的综合性能。这项工作表明，具有显着非线性可饱和吸收特性的 HfS2 可作为推进非线性光学发展的有前景的候选材料。