掺Er^(3+)/Yb^(3+)光纤激光的理论分析

THEORETICAL ANALYSIS OF Er 3+ /Yb 3+ CODOPED FIBER LASER

提出了光纤腔掺Ｅｒ３＋／Ｙｂ３＋光纤激光的模型和速率方程，推导了阈值泵浦功率的解析公式．运用数值求解方法，得到了光纤中反转粒子数分布、小信号增益系数和激光的输出功率．同时也给出了数值曲线，可用于掺Ｅｒ３＋／Ｙｂ３＋光纤激光器的优化设计．

A model and rate equations of Er 3+ /Yb 3+ codoped fiber laser are proposed,and a analystical fomula of threshold pump power is obtained. Using numberical method,we have obtained the inverted populations distribtiion along the fiber cavity,small signal gain coeffciect and laser power. A few numerical plots have been presented and may been used as guidelines for the optimal design of the laser.