双波长泵浦4.3μm Dy∶InF3高能中红外光纤激光理论研究  

Theoretical Study of 4.3μm Dual-Wavelength Pumped Dy∶InF3 High-Energy Mid-Infrared Fiber Lasers

作　　者：瞿崇兵 康民强[1,2] 向祥军 李剑彬 周松 郑建刚[1] 朱启华[1] 邓颖[1] Qu Chongbing;Kang Minqiang;Xiang Xiangjun;Li Jianbin;Zhou Song;Zheng Jiangang;Zhu Qihua;Deng Ying(Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;Graduate School,China Academy of Engineering Physics,Beijing 100088,China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]中国工程物理研究院研究生院,北京100088

出　　处：《中国激光》2020年第8期20-27,共8页Chinese Journal of Lasers

摘　　要：提出了利用1.7μm和2.3μm双波长泵浦掺镝(Dy)氟化铟(InF3)光纤产生4.3μm中红外激光的方案。计算了泵浦光功率、信号光功率以及粒子数密度在腔内的空间分布,数值分析了泵浦光功率、输出镜反射率、光纤长度、光纤损耗等对激光输出功率的影响。计算结果表明,双波长泵浦能有效地去除自终止效应,进而实现4.3μm激光输出,激光输出功率主要取决于2.3μm泵浦光功率。当1.7μm泵浦光功率一定时,输出激光功率随2.3μm泵浦光功率的增加呈线性增加;当2.3μm泵浦光功率一定时,存在最佳的1.7μm泵浦光功率,其使得激光输出功率最大。研究结论为在光纤中产生高功率连续波运转的4μm波段激光提供了一种可行方案,该方案对利用双波长泵浦Dy∶InF3光纤激光器获得4μm波段激光具有指导意义。4.3μm mid-infrared fiber lasers are produced by pumping Dy-doped InF3 with dual wavelengths of 1.7μm and 2.3μm.The spatial distributions of pump light power,signal light power and population density in the cavity are calculated,and the influences of pump light power,reflectivity of the output mirror,fiber length,and fiber loss on output laser power are numerically analyzed.The calculation results show that the self-termination effect can be effectively eliminated by dual-wavelength pumping,and the 4.3μm laser output can be realized.The laser output power mainly depends on the power of 2.3μm pump laser.When the 1.7μm pump laser power is fixed,the laser output power increases linearly with the increase of the 2.3μm pump laser power.When the 2.3μm pump laser power is fixed,the optimal 1.7μm pump laser power is obtained,which makes the laser output power maximum.The study results provide a feasible scheme for the operation of a 4μm high-power continuous-wave fiber laser,which is instructive for obtaining 4μm lasers via dual-wavelength pumped Dy∶InF3 fiber laser.

关 键 词：激光器 光纤激光 中红外激光 数值模拟 镝离子 

分 类 号：O432.1[机械工程—光学工程]