超高斯光束经椭圆环光阑的衍射和光束质量评价  

Diffraction of super Gaussian beams by an elliptic annular aperture and their beam quality characterization

作　　者：卿与三[1] 吕百达[1] 

机构地区：[1]四川大学激光物理与化学研究所

出　　处：《激光杂志》2001年第5期15-17,共3页Laser Journal

基　　金：四川省重点科技基金资助项目

摘　　要：本文采用数值计算方法讨论了超高斯光束经椭圆环的衍射现象。以桶中功率 (PIB)、β参数和η参数为远场激光光束质量的评价参数 ,对超高斯光束经椭圆环衍射后的光束质量作了详细的研究。大量数值计算和物理分析表明 ,在椭圆环外径一定的条件下 。The diffraction of super Gaussian beams by an elliptic annulus is studied numerically.By choosing the power in the buckle(PIB),β parameter and η parameter as criteria for characterizing beam quality in the far field,the beam quality of super Gaussian beams passing through the elliptic annular aperture is analyzed in detail.A large number of numerical calculations show that their beam quality depends on the obscure ratio and beam order,if the outer radii of the elliptic annular aperture are fixed.

关 键 词：超高斯光束 椭圆环光阑 衍射 光束质量 

分 类 号：O436.1[机械工程—光学工程]