【摘要】 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。更多还原

【Abstract】 Numerical simulations of the Yb/Er co-doped double cladding fiber laser pumped at 980 nm were performed.The upper energy level population,pumping power and signal power along the axis direction of the fiber at stable-state were analyzed.The relation of the output power versus the fiber length and the reflectivity of the output mirror was calculated as well.According to the numerical analysis results,an Yb/Er co-doped double cladding fiber with length of 4 m was employed as the gain medium and a fiber Bragg grating(FBG)with reflectivity of 15% was used as the output mirror to set up a all fiber laser.The slope efficiency of the fiber laser is 40%.At the maximum pump power of 3.4 W,the output power of 1.25 W with an output spectrum width of 0.49 nm was obtained.更多还原