Yun Ling, Zhao Wei
Advanced Photonic Technology Lab, Nanjing University of Posts and Telecommunications, Nanjing 210046, China.
State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.
Nanomaterials (Basel). 2021 Sep 29;11(10):2561. doi: 10.3390/nano11102561.
PbS quantum dots (QDs), a representative zero-dimensional material, have attracted great interest due to their unique optical, electronic, and chemical characteristics. Compared to one- and two-dimensional materials, PbS QDs possess strong absorption and an adjustable bandgap, which are particularly fascinating in near-infrared applications. Here, fiber-based PbS QDs as a saturable absorber (SA) are studied for dual-wavelength ultrafast pulses generation for the first time to our knowledge. By introducing PbS QDs SA into an erbium-doped fiber laser, the laser can simultaneously generate dual-wavelength conventional solitons with central wavelengths of 1532 and 1559 nm and 3 dB bandwidths of 2.8 and 2.5 nm, respectively. The results show that PbS QDs as broadband SAs have potential application prospects for the generation of ultrafast lasers.
硫化铅量子点（QDs）作为一种典型的零维材料，因其独特的光学、电子和化学特性而备受关注。与一维和二维材料相比，硫化铅量子点具有强吸收和可调节的带隙，这在近红外应用中尤为引人入胜。据我们所知，这里首次研究了基于光纤的硫化铅量子点作为可饱和吸收体（SA）用于产生双波长超快脉冲。通过将硫化铅量子点可饱和吸收体引入掺铒光纤激光器中，该激光器能够同时产生中心波长分别为1532和1559 nm、3 dB带宽分别为2.8和2.5 nm的双波长传统孤子。结果表明，硫化铅量子点作为宽带可饱和吸收体在超快激光器的产生方面具有潜在的应用前景。
