双包层Er-Yb共掺光纤放大器上能级粒子数分布研究

Study on the Upper State Population Distribution of Double Cladding Erbium-ytterbium Co-doped Fiber Amplifiers

基于速率方程和功率传播方程 ,数值分析了双包层Er Yb共掺光纤放大器在波长为 972nm的泵浦光作用下 ,分别采用三种不同泵浦方式 ,其Er3+ 和Yb3+ 上能级粒子数分布情况 .数值结果表明 ,Er3+ 上能级粒子数分布受信号功率影响作用大 ,激发率基本保持在 5 0 %以上 ;Yb3+ 上能级粒子数分布受泵浦功率影响作用大 ,激发率基本保持在 10 %以下 ,该结论对双包层Er Yb共掺光纤放大器的性能研究具有一定指导意义 .

Based on rate and power propagation equations, the upper state population distribution of Er 3+ and Yb 3+ of an double cladding erbium-ytterbium co-doped fiber amplifier was analyzed numerically under three different 972 nm pumping scheme. It was shown that the upper state population distribution of Er 3+ is chiefly affected by signal power and its lasing rate is almost kept upward of 50%; and that the upper state population distribution of Yb 3+ is chiefly affected by pump power and its lasing rate is almost kept under 10%. The results could be important for the characteristic investigation of double cladding erbium-ytterbium co-doped fiber amplifiers.