半导体泵浦亚稳态惰性气体激光器研究

项目名称： 半导体泵浦亚稳态惰性气体激光器研究

项目编号： No.61308044

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 杨子宁

作者单位： 中国人民解放军国防科学技术大学

项目金额： 27万元

中文摘要： 半导体泵浦亚稳态惰性气体激光器（DPMRL）是在半导体泵浦碱金属蒸气激光器（DPAL）的研究基础上新兴的光泵浦气体激光器，由于亚稳态惰性气体原子与碱金属原子具有结构和性质上的相似性，DPMRL继承了DPAL的优势，同时克服其介质内易于发生化学反应的不足，是极具发展潜力的新型高能激光光源备选方案。本课题以DPMRL为研究对象，建立反映激光器主要能级弛豫过程的速率方程模型；测量缓冲气体对原子跃迁谱线的碰撞加宽系数，搭建与泵浦跃迁谱宽相匹配的窄线宽半导体泵浦源；研究缓冲气体对泵浦与激光上能级之间粒子数碰撞弛豫过程的影响，分析是否存在显著影响激光器三能级运转机制的其他能级弛豫过程；测量DPMRL小信号增益，搭建谐振腔进行出光实验，分析主要的参量影响与机制。本课题的研究将深化对DPMRL能级弛豫过程以及效率影响因素的理解，为进一步验证DPMRL的高功率高效连续运转能力奠定理论和实验基础。

中文关键词： 亚稳态原子；介质阻挡放电；碱金属激光；可调谐半导体吸收光谱；线宽压缩

英文摘要： Based on the development of diode pumped alkali vapor laser (DPAL), a new kind of optically pumped gas laser is proposed: the diode pumped metastable rare gas laser (DPMRL). Due to the similarity in energy structure and physical characteristics between metastable rare gas atom and alkali atom, DPMRL possesses the many advantages of DPAL in power scaling, and furthermore avoids the problem of chemical reaction in DPAL's gain medium. So DPMRL becomes a very potential candidate in high power laser field. This mission takes the DPMRL as research object, with research contents including: set up rate equation model to describe the main kinetic processes; measure the linewidth broadening coefficients of buffer gases to pump and laser transitions of metastable rare gas atoms, and correspondingly set up the linewidth narrowed diode laser pump source; study the buffer gas induced collisional relaxation process between the upper pump and laser levels, analyze if other relaxation processes exist which could obviously affect the "three energy level" laser performance; measure the small signal gain, conduct the lasing experiment with a resonator, and analyze the main influencing factors. This research will deepen the understanding of DPMRL's energy relaxation processes and efficiency influencing mechanism, and will establish

英文关键词： metastable atom；dielectric barrier discharge；alkali vapor laser；tunable diode laser absorption spectroscopy；linewidth narrowing