掺杂硅石纳米粉末的染料随机激光发射  

Random lasing in dye doped with silica nano-powder

作　　者：李文超[1] 孙宇超[2] 李欣[3] 李志全[2] 

机构地区：[1]东北大学秦皇岛分校控制工程学院,河北秦皇岛066004 [2]燕山大学电气工程学院,河北秦皇岛066004 [3]哈尔滨工业大学航天学院控制与仿真中心,哈尔滨150080

出　　处：《强激光与粒子束》2013年第7期1798-1802,共5页High Power Laser and Particle Beams

基　　金：河北省自然科学基金项目(F2012203204)

摘　　要：针对染料随机激光器特性与应用研究,讨论了无序介质中荧光粒子和额外散射粒子的发光性质、浓度变化以及颗粒尺寸与随机激光发射阈值之间的关系。采用时域有限差分法直接求解Maxwell方程组及速率方程组的方法,模拟仿真出了相应的发射谱线及浓度变化与激光发射阈值的关系曲线。所设计的样品中Rh6G-SiO2的质量分数为4%,其阈值大小为8.5μJ/pulse时,额外微小散射体TiO2的加入对该介质随机激光发射产生的影响很小,可忽略不计。在此基础上,通过进一步模拟分析了处于不同条件和背景下随机激光的阈值特性。For the property and application of dye random laser, the relations among the random laser emission threshold, luminescent properties, number density change and particle size of fluorescence particles and additional scattering particles in dis- order media were discussed. Using the finite difference time domain （FDTD） method to solve Maxwell＇s equations and rate equa- tions directly, the curves of number density and emission line changing with laser emission threshold were simulated. When the mass fraction of Rh6G-SiO2 was 4% and the threshold was 8.5 μJ/pulse, the influence of additional TiO2 particles on random las- ing was small enough to be neglected. Furthermore, we also simulated the threshold characteristics of random lasing in variety of conditions and background media.

关 键 词：随机激光 时域有限差分法 多重散射 激光染料 

分 类 号：O436[机械工程—光学工程]