【作者】 田芳圃；

【导师】 张喜和；

【作者基本信息】 长春理工大学 ， 光学， 2009， 硕士

【摘要】 本论文通过对激光二极管发光特性的分析研究,建立了二极管侧面抽运激光介质中抽运光功率分布的物理模型与数学模型,采用光线追迹法模拟计算了抽运光功率在激光介质中的分布情况。引入均方差的概念,建立了抽运光功率分布均匀性判定方法。分别在有水冷和无水冷两种情况下,分析出等间距环绕抽运的激光二极管的个数、激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的不同给抽运的均匀性带来的差异。最后,针对双拱形LD侧面抽运Nd:YAG激光器以及水冷条件下LD三向侧面抽运的Nd:YAG激光器这两种实际模型进行模拟,得出设计两种泵浦模块时所采用的激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的最佳值,并且最终模拟出在最佳参数情况下两种模型的抽运光功率分布图形。更多还原

【Abstract】 In this paper,both the physics model and mathematic model of the pump power absorption and distribution in the LD side-pumped solid state laser medium are set up. The pump power distribution in the single diode directly pumped laser rod with different pumped parameters is simulated using the method of ray trace. A method to estimate the distribution of pump power is bring up.The effect of the different active medium’s absorption coefficient , distance between thediode and the laser rod , radius of laser rod and thickness of water collar on the pump powerdistribution in the laser rod is studied under the condition of the laser rod both with cooling system and without cooling system. Finally, optimum parameters are got both in LD side-pumped Nd: YAG laser in which Condenser chamber is in double arched style and LD side-pumped Nd:YAG laser in three direction with water cool system , and the Gauss distribution of the pump power in the two systems with those optimum parameters are got.更多还原