后向级联泵浦的10 kW高光束质量光纤激光器  

10 kW Counter-Tandem-Pumped Fiber Laser with High Beam Quality

作　　者：肖虎 李瑞显 陈子伦 奚小明 吴函烁 冷进勇 黄良金 潘志勇 王小林[1,2,3] 王泽锋 周朴[1] 陈金宝[1,2,3] Xiao Hu;Li Ruixian;Chen Zilun;Xi Xiaoming;Wu Hanshuo;Leng Jinyong;Huang Liangjin;Pan Zhiyong;Wang Xiaolin;Wang Zefeng;Zhou Pu;Chen Jinbao(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,Hunan,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,Hunan,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,Hunan,China)

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

出　　处：《光学学报》2022年第23期259-262,共4页Acta Optica Sinica

摘　　要：实现万瓦级高光束质量光纤激光面临模式控制和非线性效应抑制等技术难题。为兼顾光束质量和功率,设计了基于纤芯直径为30μm、包层直径为250μm的双包层掺镱光纤的后向级联泵浦激光器,实现了输出功率为10.03 kW、M^(2)因子为1.92、拉曼抑制比大于38 dB的激光输出,实现万瓦级光纤激光器的光束质量M2优于2,这验证了常规双包层光纤具有支撑万瓦高光束质量激光产生和放大能力。Mode control and nonlinear effect suppression are technical problems to obtain 10 kW-level fiber laser with high beam quality.For the purpose of high beam quality and output power,a counter-tandem-pumped fiber laser employing a double clad fiber with a fiber core diameter of 30μm and a clad diameter of 250μm is demonstrated.A laser output with an output power of 10.03 kW,a beam quality factor M^(2) of 1.92,and a Raman inhibition ratio of 38 dB is achieved.A beam quality factor M~2 better than 2 is realized,which confirms the possibility of generation and amplification of 10 kW-level fiber laser of high beam quality with conventional double clad fibers.

关 键 词：激光器 高功率光纤激光器 级联泵浦 后向泵浦 双包层光纤 受激拉曼散射 

分 类 号：TN248[电子电信—物理电子学]