弱反馈下脉冲掺镱放大器输出特性的计算机仿真  

The Computer Simulation of Output Characteristics of Pulse Ytterbium-Doped Amplifiers under Weak Feedback

作　　者：孔令芳[1] 果鑫[1] 李娜[1] 刘丰年[1] 李长云[1] 

机构地区：[1]湖南工业大学计算机与通信学院,湖南株洲412007

出　　处：《湖南工业大学学报》2010年第5期54-57,共4页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(60773110);湖南省教育厅基金资助项目(09C316)

摘　　要：基于全光纤双包层脉冲掺镱放大器模型,研究了纳秒脉冲的动态传输特性。在不考虑输入信号的情况下,受前向泵浦的掺镱双包层光纤上能级粒子数的分布呈现中间高两端低的特征。考虑连续信号输入,在放大器存在弱反馈条件下,泵浦功率越高,弱反馈引起的后向放大信号消耗更多上能级粒子,正向的信号输出功率随着光纤长度的增加而降低。Based on the all-optical pulse Yb-doped double-clad amplifier modeling,studies the dynamic transmission characteristics of nanosecond pulses.Without considering the input signal,the upper-level population of ytterbium-doped double-clad fiber by forward-pumped distributes the characteristics of high intermediate and low at two ends.Considering the continuous signal input and the existence of weak feedback in amplifier,the backward amplified signals caused by the weak feedback consumes more number of upper-level particles as the pump power is higher.When the fiber length increases,a positive signal output power reduces.

关 键 词：弱反馈 掺镱放大器 输出特性 

分 类 号：TN915.05[电子电信—通信与信息系统]