光子学报, 2015, 44 (10): 1014002, 网络出版: 2015-11-30
掺镱全光纤激光器研究
Research of Yb-doped All Fibre Lasers
激光器 全光纤激光器 双向抽运 双包层光纤 级联泵浦耦合器 高功率输出 Fiber laser All-fiber laser Two-end pump Double-clad fiber Cascaded pump-combiners High power output
摘要
依据速率方程和边界条件,对高功率多点抽运全光纤激光器进行了研究.通过自制的级联侧面泵浦耦合器搭建全光纤激光器,级联耦合器的单点泵浦效率为96%,泵浦传输损耗为10%,信号光损耗分别是0.18 dB和0.87 dB;线性谐振腔结构中:前向抽运的光-光转换效率为69%,低于后向抽运中70%的光-光转换效率,与理论分析一致;双向泵浦方式中,在单臂输入975 nm泵浦功率为110 W的条件下,激光功率输出为311 W,中心波长为1 080 nm,光谱宽度为1.6 nm,光-光转换效率为70%,光束质量约为1.3.激光器性能稳定,若增加单臂泵浦功率或级联泵浦耦合器个数,可获得更高功率的激光输出.
Abstract
In order to research high-power multi-position-pumped fiber lasers,the theoretical analysis was presented based on the rate equations and boundary conditions of Yb-doped double-clad fiber lasers. All-fiber laser is built with the self-made cascaded couplers. In the experiment,the pump efficiency of a single coupler is 96%,pump transmissiom loss is 10%,signal loss of the couplers are 0.87 dB and 0.18 dB respectively. In the structure of linear cavity,the optical conversion of forward pump is 69%,lower to the backward pump of 70% optical conversion,consistent with theoretical simulations; in the two-end pump,single input pump power of 975 nm is 110 W,the output power is 311 W with the central wavelength of 1 080 nm,spectral width is 1.6 nm,the optical-optical conversion is 70%,M2~1.3. The results have shown that the output power of laser will continue to increase with the increase of the pump power or the number of couplers.
张雪霞, 葛廷武, 谭祺瑞, 刘琛辰, 王智勇. 掺镱全光纤激光器研究[J]. 光子学报, 2015, 44(10): 1014002. ZHANG Xue-xia, GE Ting-wu, TAN Qi-rui, LIU Chen-chen, WANG Zhi-yong. Research of Yb-doped All Fibre Lasers[J]. ACTA PHOTONICA SINICA, 2015, 44(10): 1014002.