双包层光纤激光器泵浦阈值的解析表达式  

Analytical solution of the threshold pump power of a double-clad fiber laser

作　　者：张利平[1] 段志春[1] 陈建国[1] 周鼎富[2] 杨泽厚[2] 

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]西南技术物理研究所,四川成都610041

出　　处：《光电工程》2006年第11期101-104,119,共5页Opto-Electronic Engineering

摘　　要：对连续运行时双包层光纤激光器阈值的优化问题进行了分析。从速率方程组出发,在不忽略光纤损耗系数和保留再发射项主导部分的近似条件下推导出了双包层光纤激光器阈值泵浦功率的显函数解析表达式,得到了光纤激光器产生振荡所需的最小光纤长度的显函数解析解;还给出了泵浦光子数密度和上能级粒子数密度沿光纤方向随光纤长度变化的显函数解析解。最后和其他文献中在忽略泵光再发射项和激光损耗的近似条件下得到的结果进行了比较和分析。The optimization of threshold pump power of the double-clad cw fiber laser has been discussed. An explicit analytical solution of the threshold pump power of the laser has been derived based on rate equations which contain the attenuation coefficients of the pump and laser radiations as well as the major contribution of the re-emission of the upper level atoms to the pump wave by using the analytical solutions. An analytical solution of the minimum fiber length required for the onset of the oscillation is presented. In addition, the analytical solutions describing the variations of the density of the pump radiation and upper laser level population along the fiber length have also been given. Finally, some conclusions drawn from the approximation that neglecting the pump re-emission and the losses of laser in other references have been analyzed and compared with the conclusions drawn from our paper.

关 键 词：耦合效率 双包层光纤激光器 Yb^3+掺杂 泵浦阈值功率 

分 类 号：TN248[电子电信—物理电子学]