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对激光二极管(LD)阵列5向侧面对称抽运Nd∶YAG薄片激光器进行了实验和模拟研究。薄片激光器的耦合系统由消像差透镜组和空心光波导组成,采用15mm×1.5mm的Nd∶YAG薄片进行初步实验,实验得到薄片激光器的激光输出平均功率为65.7W,光-光转换效率为10.5%,同时增益介质内具有较理想的荧光分布。同时考虑激光二极管在快轴和慢轴方向的发散特性及增益介质侧面的散射特性,采用光线追迹法,模拟并分析了增益介质内抽运光分布,模拟结果表明耦合系统具有88.3%的耦合效率,同时增益介质内具有较理想的抽运光分布,且与实验结果相吻合。
Experiments and simulations of the laser diode (LD) array 5 on the side-symmetrically pumped Nd:YAG thin-film lasers were carried out. The coupling system of the lasing lasers consists of an achromatic lens group and a hollow optical waveguide. The experiments of the Nd:YAG lays with dimensions of 15mm × 1.5mm are carried out. The average laser output power of the lasing lasers is 65.7W and the light-to-light conversion efficiency 10.5%, while the gain medium has a more ideal fluorescence distribution. Considering the divergence characteristics of the laser diode in the fast axis and the slow axis and the scattering characteristics on the side of the gain medium, the light tracing method was used to simulate and analyze the pump light distribution in the gain medium. The simulation results show that the coupling system has 88.3% coupling Efficiency, while the gain medium has a more ideal pumping light distribution, and with the experimental results.