双端输出全光纤振荡器突破8 kW高功率输出  

A bidirectional output all-fiber laser oscillator with record output power of 8 kW

作　　者：刘佳琪 曾令筏 史尘 吴函烁 王鹏[1,2,3] 奚小明 张汉伟[1,2,3] 王小林[1,2,3] 习锋杰[1,2,3] Liu Jiaqi;Zeng Lingfa;Shi Chen;Wu Hanshuo;Wang Peng;Xi Xiaoming;Zhang Hanwei;Wang Xiaolin;Xi Fengjie(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;Nan Hu Laser Laboratory,National University of Defense Technology,Changsha 410073,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学前沿交叉学科学院,长沙410073 [2]国防科技大学南湖之光实验室,长沙410073 [3]国防科技大学高能激光技术湖南省重点实验室,长沙410073

出　　处：《强激光与粒子束》2023年第8期23-25,共3页High Power Laser and Particle Beams

基　　金：湖南省杰出青年基金项目(2023JJ10057);长沙市杰出创新青年培养计划项目(kq2206006);基础科学研究项目(JCKY2021525B015)。

摘　　要：双端输出光纤激光振荡器可以通过一个单谐振腔结构实现两路激光输出,能够减少高功率光纤激光系统的体积和成本,在工业领域有着很好的应用前景。基于双端泵浦谐振腔结构,采用稳波长981nm光纤耦合半导体激光器(LD)泵浦纤芯/包层直径为30/400μm的双包层掺镱光纤,首次实现了总功率大于8 kW的双端输出光纤激光振荡器。在总最高泵浦功率为10.951 kW时,A端输出功率为3769 W,B端输出功率为4400 W,总功率为8169 W,激光器光-光转换效率74.6%,A、B端激光光束质量M2因子分别约2.13和2.36。在最高输出功率时,两端输出激光中均未观察到动态模式不稳定效应(TMI)和受激拉曼散射(SRS),通过进一步增加泵浦功率,有望实现更高功率的激光输出。The bidirectional output fiber laser can achieve two laser outputs through a resonant cavity structure,which can reduce the volume and cost of high-power fiber laser systems and has good application prospects in the industrial field.Based on the oscillator with bidirectional pumping,employing the double cladding ytterbium-doped fiber(DCYDF)with a core/cladding diameter of 30/400μm which was pumped by the wavelength-stabilized 981 nm laser diodes(LDs),a bidirectional output fiber laser oscillator with a total output power of greater than 8 kW was achieved experimentally for the first time.With the total bidirectional pump power of 10.951 kW,a total output power of 8169 W with 3769 W at end A and 4400 W at end B were achieved,with an O-O efficiency of 74.6%.No TMI or SRS were observed at both ends,and higher laser output power can be expected by further increasing the pumping power.

关 键 词：光纤激光器 双端输出光纤激光振荡器 受激拉曼散射 模式不稳定效应 光纤盘绕 

分 类 号：TN242[电子电信—物理电子学]