论文部分内容阅读
对980nm抽运的双包层Yb/Er共掺光纤激光器进行了数值模拟,分析了稳态情况下光纤中上能级粒子数,抽运光功率,信号光功率沿光纤轴向的分布。计算了激光器输出功率与光纤长度的关系,激光器输出腔镜反射率与输出功率的关系。根据数值模拟的结果,采用4m长的铒镱共掺双包层光纤作为增益介质,反射率为15%的双包层光纤光栅作输出腔镜组建了全光纤激光器,其斜率效率为40%。在3.4W的最大抽运功率下,得到了1.25W的激光输出,输出光谱宽度为0.49nm。
The double-clad Yb / Er co-doped fiber laser with 980nm pumping was numerically simulated. The distribution of the upper energy level, the pump power and the signal power along the fiber axis under steady-state condition were analyzed. The relationship between laser output power and fiber length was calculated, and the relationship between laser output cavity mirror reflectivity and output power was calculated. According to the numerical simulation results, a 4m-length erbium-ytterbium co-doped double-clad fiber is used as the gain medium, and a double-clad fiber grating with a reflectivity of 15% is used as the output cavity mirror to form an all-fiber laser with a slope efficiency of 40%. At a maximum pumping power of 3.4W, a 1.25W laser output was obtained with an output spectral width of 0.49nm.