自调Q光纤激光器的理论分析和数值模拟  

Analysis of Theory and Simulation of the Self-Q-switched Fiber Lasers

作　　者：李勇男[1] 董连永[1] 谢春霞[1] 孙立萍[1] 范宇[1] 段云峰[1] 吕福云[1] 

机构地区：[1]南开大学物理科学学院光电信息科学系,天津300071

出　　处：《光子学报》2007年第9期1570-1573,共4页Acta Photonica Sinica

基　　金：国家自然科学基金重点项目(60137010);国家自然科学基金(69977012);天津市攻关项目(033183611)光电信息技术科学教育部重点实验室(南开大学;天津大学)资助

摘　　要：基于自调Q光纤激光器的基本理论,结合速率方程理论与自调Q特点,借助简化的环形腔掺Er3+光纤激光器模型,分析了泵浦功率与自调Q脉冲周期、峰值功率的关系.随着泵浦功率的增加,光纤激光器自调Q脉冲的周期减小,峰值功率变大;当信号光强足够大时,激光器的自调Q现象消失,变为准连续激光输出.通过MATLAB编程对光纤激光器输出特性进行了数值模拟,模拟结果与实验结果基本相符.Based on theories of the self-Q-switch fiber lasers, rate equation theory and self-Q-switch characteristics, the relation of pump power to self-Q-switched pulse duration and peak power is analyzed in a ring cavity Er^3- doped fiber laser. It is found that the higher the pump power is, the shorter the duration of the self-Q-switch pulse becomes, with the greater peak power. When the signal power grows high enough, the phenomenon of self-Q-switch vanishes and a quasi-continuous laser is produced. The output characteristics of the Qswitched fiber laser are simulated with MATLAB, and the results agree with the experiment approximately.

关 键 词：光纤激光器 自调Q 数值模拟 

分 类 号：TN248.1[电子电信—物理电子学]