中红外3μm波段激光技术在遥感、医疗、工业加工、气体探测、自由空间光通信等领域有着极其重要的应用。面对目前中红外超短脉冲激光器的市场需求以及可选择的中红外波段锁模器件稀缺的现状，本项目拟开展基于MXene可饱和吸收体的掺Er氟化物(Er:ZBLAN)锁模光纤激光器的研究。掌握MXene材料的可控制备技术，为中红外3μm波段激光器的研究提供物质基础；测试其在中红外3μm波段的非线性光学特性，揭示MXene与中红外3μm激光的高效作用机理；理论和实验研究Er:ZBLAN光纤激光器中，锁模脉冲的性质与可饱和吸收体参数、激光腔参数的之间的联系；优化可饱和吸收器件的结构及腔的设计，实现基于MXene的中红外3μm波段高能超短脉冲的稳定输出。本课题的开展可深入MXene材料在中红外波段非线性光学特性的理解，为中红外波段锁模激光器的发展提供理论基础和实验依据。

Mid-infrared lasers at 3 μm waveband have many important applications such as remote sensing, medical treatment, industrial processing, gas detection, free space optical communication and so on. With regard to urgent market demands of mid-infrared ultrashort pulse lasers with the shortage of mid-infrared mode-locked devices, MXene saturable absorber based Erbium-doped fluoride (Er: ZBLAN) fiber lasers at 3 μm waveband is proposed. This project aims to master controllable preparation of MXene nanomaterials in order to satisfy the study in mid-infrared fiber lasers at 3 μm waveband. By using the nonlinear optical measurement system, mid-infrared nonlinear optical properties of MXene will be revealed. The relationship between the mode-locked pulse characteristic and the parameters of saturable absorber and laser cavity will be studied both theoretically and experimentally. By optimizing the MXene saturable absorber structure and cavity design, excellent performance mode-locked pulses from 3 μm Er: ZBLAN fiber laser will be obtained. This study will make a deeper understanding of the nonlinear optical properties of MXene in mid-infrared region. Moreover, it will also provide theoretical and experimental acknowledgements to the development of the ultrashort pulse lasers in mid-infrared region.