不同泵浦参数对泵浦光强分布影响的模拟分析

Simulation Analysis on Intensity Distribution of Multi-pumped Light with Different Pumping Parameters

采用高斯函数近似的方法,模拟与分析了侧面泵浦下,改变泵浦结构、泵浦光半径、增益介质半径以及吸收系数时,注入到激光棒中的泵浦光强分布情况,得出了增大泵浦组数与泵浦光斑尺寸、减小激光棒半径有利于增强泵浦均匀性的结论,同时指出,介质吸收系数选择应合理,过大或过小都不利于泵浦能量的均匀分布与系统效率的提高。通过模拟计算,给出了优化系统参数的方法,从而改善激光器性能、提高激光输出效率。

By approaching of the Gaussian function, the intensity distribution of multi-pumped light with different pumping parameters such as pumping structure, pumping beam waist, gain medium radius and absorption coefficient has been simulated, and the impact of the different pumping parameters on the pumping homogeneity has also been discussed. The conclusion is that the pumping intensity distribution can be strengthened by increasing pumping direction and pumping beam waist, and it can also be strengthened by decreasing the gain medium radius. It indicates that the absorption coefficient should be moderate.