设计了二极管侧面抽运 Nd:YAG 薄片激光器,耦合系统由消像差透镜组和空心光波导组成,对二极管快轴和慢轴方向的抽运光进行压缩和均匀化。采用光线追迹法,同时考虑二极管在快轴和慢轴方向的发散特性及薄片侧面的散射特性,模拟并分析了光线在耦合系统内的传输和薄片内抽运光分布的规律。模拟结果表明耦合系统具有98.1%的耦合效率,同时薄片内具有理想的抽运光分布。 A diode-side pumped Nd: YAG lamellar laser is designed. The coupling system consists of an achromatic lens group and a hollow optical waveguide, which compress and homogenize the pump light in the fast axis and the slow axis of the diode. The ray tracing method is adopted, and the divergence characteristics of the diode in the fast axis and the slow axis and the scattering characteristics of the flanks are taken into account simultaneously. The distribution of light in the coupled system and the light distribution in the coupled system are simulated and analyzed. The simulation results show that the coupling system has a coupling efficiency of 98.1% and an ideal pumping light distribution in the sheet.