5kW Nd:YAG端面抽运板条激光器及其光束质量提升  

5kW End-Pumped Nd:YAG Slab Lasers and Beam Quality Improvement

作　　者：王君涛[1,2] 童立新[1,2] 徐浏[1,2] 吴振海[1,2] 李密[1,2] 陈小明[1,2] 陈月健[1,2] 汪丹[1,2] 周唐建[1,2] 胡浩[1,2] 高清松[1,2] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900 [2]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621900

出　　处：《中国激光》2018年第1期12-17,共6页Chinese Journal of Lasers

摘　　要：理论分析了影响二极管端面抽运Nd:YAG板条激光放大器放大效率的因素,设计了主振荡功率放大板条连续激光器。使用1064nm窄线宽光纤激光器作为种子源,采用两个Nd:YAG板条激光放大器先串接再双程放大的技术路线。两个Nd:YAG板条激光放大器的尺寸结构完全相同,Nd:YAG板条的尺寸均为150.2 mm×2.5mm×30mm,每个板条都是半导体激光器阵列双端抽运。放大器抽运源总功率为21.6kW时,实现了5.4kW连续激光的输出,光-光转换效率为24.8%,光束质量β为3.5。在输出光路位置使用狭缝空间滤波器,光束质量β可以提升到2.5。The factors that influence the amplification efficiency of diode end-pumped Nd∶YAG slab laser amplifier are theoretically analyzed, and a master oscillator power amplifier continuous wave laser system is designed. A narrow linewidth 1064 nm fiber laser is used as the seeder, and series and then double pass on two Nd∶YAG slab laser amplifier is followed. The two Nd∶YAG slab laser amplifiers have the same configuration, with the slab of 150.2 mm×2.5 mm×30 mm, which are pumped in double end by diode laser array （DLA）. The continuous laser is output when the amplifier is pumped at 21.6 kW, with output power of 5.4 kW, optical to optical efficiency of 24.8%, and beam quality β of 3.5. Furthermore, the beam quality could be improved to 2.5 with the help of spatial filter.

关 键 词：激光器 固体激光器 激光放大器 板条 空间滤波器 

分 类 号：TN248[电子电信—物理电子学]