Wang Fang, Zhang Fan, Wang Guorui, Chen Haobin, Zhang Xuenan, Qin Guanshi, Cheng Tonglei
State Key Laboratory of Synthetical Automation for Process Industries, the College of Information Science and Engineering, Northeastern University, Shenyang 110819, P. R. China.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China.
ACS Appl Mater Interfaces. 2020 Dec 23;12(51):57461-57467. doi: 10.1021/acsami.0c18569. Epub 2020 Dec 11.
Semiconducting polymer nanoparticles (SPNs) possess many special photophysical and chemical properties. However, little research has been done on the potential of SPNs in laser technology. In this work, we present the ultrafast pulses generation at 1.5 and 2 μm through proposing the deposition of SPNs onto a side-polished fiber (SPF) platform as the nonlinear optical modulator. SPNs are designed and prepared through a combination of density functional theory and nanoreprecipitation method. The prepared SPNs not only exhibit strong linear absorption but also has nonlinear saturable absorption characteristics. Once SPF-SPNs saturable absorber (SA) is integrated into the laser cavity, ultrafast lasers of 1.5 and 2 μm can be achieved with high performance. Our results show that SAs based on the SPNs and SPF are promising nonlinear optical modulators for broadband ultrafast pulse generation.
半导体聚合物纳米颗粒（SPNs）具有许多特殊的光物理和化学性质。然而，关于SPNs在激光技术中的潜力的研究却很少。在这项工作中，我们通过提出将SPNs沉积到侧面抛光光纤（SPF）平台上作为非线性光学调制器，展示了在1.5微米和2微米处产生超快脉冲的方法。通过密度泛函理论和纳米沉淀法相结合的方式设计并制备了SPNs。所制备的SPNs不仅表现出强烈的线性吸收，还具有非线性饱和吸收特性。一旦将SPF-SPNs饱和吸收体（SA）集成到激光腔中，就可以实现高性能的1.5微米和2微米超快激光器。我们的结果表明，基于SPNs和SPF的SA是用于宽带超快脉冲产生的有前途的非线性光学调制器。
