空心高斯光束多棒环形并接放大器输出的理论分析与数值模拟

摘要

In order to achieve high-power laser output, a multi-rod annular merging amplifier was designed. According to Kirchhoff diffraction theory, the model of the multi-rod annular merging amplifier was analyzed. The theoretic model for laser transmission of the amplifier was established. Then the intensity distribution of the amplified laser beam was calculated and plotted by using Matlab. The result of calculation indicated that the light intensity in the central axis was strengthened because of diffraction. The amplification of the hollow Gaussian beam was realized by using the multi-rod annular amplifier.%为获得高功率激光输出,设计了激光束多捧环形并接放大器.运用基尔霍夫衍射理论对多捧并接环形放大器模型进行分析,建立了多捧并接环形放大器输出激光传播情况的理论模型,利用Madab软件模拟计算并绘制了经过放大器放大后,激光光束传播时的光强分布图.计算结果表明,采用多捧环形放大器,由于衍射的作用,轴线中心的光强得到了加强,实现了对空心高斯光束的放大.