3.5 µm中红外超短脉冲掺铒ZBLAN光纤激光器关键技术研究

项目名称： 3.5 µm中红外超短脉冲掺铒ZBLAN光纤激光器关键技术研究

项目编号： No.61505004

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 刘江

作者单位： 北京工业大学

项目金额： 22万元

中文摘要： 中红外光纤激光器在大气探测、激光医疗、激光雷达以及光电对抗等领域有着重要应用，成为近年来国际前沿性研究热点。项目申请人在石墨烯锁模光纤激光器、2 µm波段高功率超短脉冲掺铥光纤放大器、以及2~5 µm波段高功率中红外超连续谱光源等领域做了大量国际领先的前沿性工作，并在ZBLAN光纤的切割、端面处理以及热管理等方面具有良好的研究基础。本项目申请将对3.5 µm中红外超短脉冲掺铒ZBLAN光纤激光器进行系统的理论与实验研究，力争在国际上率先将超短脉冲光纤激光器的工作波段扩展到3.5 µm中红外波段。主要内容包括：研究中红外被动锁模掺铒ZBLAN光纤激光器的脉冲动力学过程；深入了解中红外掺铒ZBLAN光纤激光器谐振腔内脉冲整形机理与稳态脉冲之间的关系；高损伤阈值石墨烯可饱和吸收体的研制；双波长泵浦提高3.5 µm波段激光转换效率的优化；实现高功率高效率3.5 µm中红外超短脉冲光纤激光输出。

中文关键词： 中红外光纤激光器；掺铒ZBLAN光纤；双波长泵浦；石墨烯锁模；超短脉冲

英文摘要： The research on mid-infrared fiber laser is one of these hot spots because of their potential applications in atmospheric gas detection, laser medicine, laser radar, mid-infrared imaging and electro-optical countermeasure system. The project applicant has achieved a word-record in graphene mode-locked fiber laser, high-power ultrashort-pulsed thulium-doped fiber amplifier at 2 µm wavelength, and high-power mid-infrared supercontinuum source at 2-5 µm wavelength. They also have a strong background in ZBLAN fiber cutting, end processing and thermal management. This project will work on a mid-infrared ultrashort-pulsed erbium-doped ZBLAN fiber laser operating at 3.5 µm wavelength region, and strive to achieve the world's first 3.5 µm mid-infrared ultrashort-pulsed fiber laser. The research work include: studying of the pulse dynamics process of passively mode-locked erbium-doped ZBLAN fiber laser; understanding of the relationship between pulse shaping mechanism and steady-state pulse in the resonant cavity of mid-infrared erbium-doped ZBLAN fiber laser; design and fabrication of graphene saturable absorber with high damage threshold; optimization of the conversion efficiency of 3.5 µm mid-infrared erbium-doped ZBLAN fiber laser using dual-wavelength pumping; and finally demonstration of a high-power and high conversion efficiency 3.5 µm mid-infrared ultrashort-pulsed erbium-doped ZBLAN fiber laser.

英文关键词： mid-infrared fiber laser;erbium-doped ZBLAN fiber;dual-wavelength pumping;graphene mode-locking;ultrashort pulse