球差透镜对高斯光束质量的影响  

Effect of the Spherically Aberrated Lens on Beam Quality

作　　者：季小玲[1] 吕百达[1] 等 

机构地区：[1]四川大学激光物理化学研究所,成都610064

出　　处：《中国激光》2001年第4期347-350,共4页Chinese Journal of Lasers

基　　金：激光技术国家重点实验室资助

摘　　要：根据自由空间束宽的传输方程 ,采用双曲线拟合的方法 ,计算了高斯光束通过球差透镜后的M2 因子。同时还研究有球差的高斯光束在透镜几何焦面和实际焦面上的桶中功率 (PIB)。以M2 因子和PIB作为光束质量评价的参数 ,进行了详细的数值计算来说明球差对光束质量的影响。得出了一些有实际应用意义的新结果。Based on the beam propagation equation in free-space, the hyperbolic-fit method is used to calculate the M2-factor of Gaussian beams passing through a spherically aberrated lens. Meanwhile, the power in the bucket (PIB) at the geometrical and real focal planes of Gaussian beams with spherical aberrations is also studied. Both M2-factor and PIB are chosen as the criterion for characterizing laser beam quality, detailed numerical calculations are performed to illustrate the effect of the spherically aberrated lens on laser beam quality. The results obtained in this paper would be useful for some practical applications.

关 键 词：光束质量 球差透镜 高斯光束 

分 类 号：TH74[机械工程—光学工程] O435[机械工程—仪器科学与技术]