PbS nanoparticles have been regarded as an effective S) element for pulse generation owing to its narrow bandgap, bandgap tunability and good long-term stability, but it has never been demonstrated at 2 μm band. In this manuscript, a stable PbS based mode-locked Tm-doped fiber laser is experimentally demonstrated at 2 μm optical band for the first time. Conventional and second-order harmonic soliton can both be realized. The results imply PbS is a reliable SA for ultrashort pulse generation.

中文翻译：

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基于硫化铅可饱和吸收体的被动锁模掺铥光纤激光器


PbS纳米粒子因其带隙窄、带隙可调性和良好的长期稳定性而被认为是脉冲产生的有效S)元素，但其在2μm波段从未得到证实。在这篇手稿中，首次在 2 μm 光波段实验演示了基于稳定 PbS 的锁模掺铥光纤激光器。常规孤子和二阶谐波孤子均可实现。结果表明 PbS 是一种用于超短脉冲生成的可靠 SA。