Here, few-layered W₂C nanosheets and microfiber-based few-layered W₂C-SA are fabricated by the magnetron sputtering deposition method. The third-order nonlinear optical responses of the prepared 2D W₂C nanosheets are investigated by the Z-scan method with β_eff and n₂ determined to be −88.2 cm/MW and −1.112×10⁻¹³ m²/W, respectively, revealing its excellent nonlinear saturable absorption properties and optical modulation capabilities. In addition, by incorporating microfiber based few-layered W₂C-SA into Yb-doped and Er-doped fiber lasers (YDFLs and EDFLs), the passively mode-locked operations at the central wavelength of 1035.1 and 1562 nm are realized, respectively. In addition, multi-soliton bound mode-locked operation in EDFLs with soliton pulses up to 36 is realized. Our results not only demonstrate the capability of few-layered W₂C as a wideband optical modulator, but also provide a practical approach to explore soliton dynamics in fiber lasers.

中文翻译：

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基于被动锁模光纤激光器的几层W ₂ C纳米片

在此，通过磁控溅射沉积法来制造几层的W ₂ C纳米片和基于微纤维的几层的W ₂ C-SA。三阶非线性所制备2D W的光学响应₂ ç纳米片是由Z-扫描法研究β _EFF和Ñ ₂确定为-88.2厘米/ MW和-1.112×10 ^-13米²分别/ W， ，揭示了其出色的非线性饱和吸收特性和光调制能力。另外，通过掺入基于微纤维的几层W ₂通过将C-SA掺入掺Yb和掺Er的光纤激光器（YDFL和EDFL），分别实现了在中心波长1035.1和1562 nm处的被动锁模操作。另外，在高达36个孤子脉冲的EDFL中，实现了多孤子束缚锁模操作。我们的结果不仅证明了多层W ₂ C作为宽带光调制器的能力，而且为探索光纤激光器中的孤子动力学提供了一种实用的方法。