平面波经方环衍射后的光束质量评价  

Beam quality of plane waves diffracted by a rectangular annular aperture

作　　者：卿与三[1,2] 江东林[1,2] 吕百达[1] 

机构地区：[1]四川大学激光物理与化学研究所 [2]宜宾学院物理系,宜宾644007

出　　处：《激光技术》2001年第5期335-337,共3页Laser Technology

基　　金：华中科技大学激光技术国家重点实验室资助项目

摘　　要：在对平面波经方环衍射后远场光强分布分析的基础上 ,对其光束质量作了详细研究。数值计算结果的物理分析表明 ,可用“桶中功率”曲线、β和 η参数评价这类环状光束的光束质量。同时也指出了这些方法的不足。On the basis of analyzing far-field intensity distribution of pane-waves diffracted by a rectangular annular aperture, a detailed study of the beam quality has been made. Numerical calculation results have been illustrated. The results indicate that it is suitable to characterizing beam quality of this type of annular beams with power in bucket (PIB),β parameter and η parameter.On the other hand,the weakness of these methods has also pointed out.

关 键 词：方环衍射 光束质量 平面波 激光 

分 类 号：TN241[电子电信—物理电子学]