3μm与2μm级联振荡Ho^(3+):ZBLAN光纤激光器的动态特性分析  

Dynamic behavior analysis of the 3 μm and 2 μm cascade Ho^(3+) :ZBLAN fiber lasers

作　　者：董淑福[1,2] 占生宝[1] 陈国夫[2] 王贤华[2] 

机构地区：[1]空军工程大学电讯工程学院,西安710077 [2]中国科学院西安光学精密机械研究所,瞬态光学与光子学技术国家重点实验室

出　　处：《物理学报》2005年第7期3154-3158,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60007003;60137010)资助的课题.~~

摘　　要：基于传输速率方程,对Ho3+:ZBLAN光纤激光器的动态特性———上能级粒子数以及输出激光功率的弛豫振荡特性进行了数值分析.通过忽略光纤参数对传输方向的依赖性,抽运光和信号光的功率传输方程被分别简化处理.结果表明,在5I6能级的粒子数首先经历一次弛豫振荡后,5I6和5I7能级的粒子数交替弛豫振荡并达到稳态;同样,在3μm波长的激光功率首先经历一次弛豫振荡后,3μm和2μm波长的激光功率交替弛豫振荡并达到稳态,而且,弛豫振荡时的峰值功率远大于稳态时的激光功率.A numerical study of the transient behavior, including upper level ions and laser power relaxation oscillation, of H3+: ZBLAN fiber laser is presented based on the propagation-rate equations. The power propagation equations for pump and signal have been treated differently by neglecting the z-dependence of the fiber laser parameters, for the sake of numerical simplicity. The results show that upper level ions of 5I 6 and 5I 7 manifolds relax alternatively and go to steady state after the first relaxation oscillation and monotonous decline. Similarly, the 3 μm and 2 μm laser powers relax alternatively first, then the 3 μm laser power declines monotonously while the 2 μm laser power increases monotonously, both of them go to steady state after the second relaxation oscillation. Moreover, peak powers of the 3 μm and 2 μm lasers in the course of relaxation oscillation are far larger than that when steady state is reached.

关 键 词：光纤激光器 ZBLAN HO^3+ 动态特性分析 弛豫振荡 激光功率 级联 粒子数 速率方程 传输方向 光纤参数 数值分析 振荡特性 简化处理 传输方程 峰值功率 依赖性 能级 信号光 抽运光 稳态 波长 

分 类 号：TN248[电子电信—物理电子学] TN244