一类新型平顶光束的传输特性研究  

Propagation Properties Study for a New Type of Flat-topped Light Beams

作　　者：曾庆刚[1] 张彬[1] 文侨[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《光电子．激光》2004年第5期617-620,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60108004)

摘　　要：利用Li近期提出的平顶光束新模型,分别推导出柱坐标系下平顶光束的M2因子和通过傍轴ABCD光学系统传输后光场分布的解析公式。以透镜系统为例,给出了柱坐标系下平顶光束聚焦场分布的解析表达式,并对平顶光束的聚焦特性进行了详细分析。研究表明,平顶光束的M2因子仅由其阶数M确定,其聚焦特性与阶数M以及系统的菲涅尔数N等有关。Making use of the new model of falt-topped light beams proposed by Li recently,the analytical expressions of the M^2-factor and the field distribution of flat-topped light beams passing through a paraxial ABCD optical system have been derived,respectively.The lens system is taken as an example and the analytical expression of the focusing field distribution of flat-topped light beams is given.The focusing properties of flat-topped light bemas have been analyzed in detail.The results have shown that the M^2-factor is only decided by the order M,the focusing properties relate to the order M and the Fresnel number N of the system.

关 键 词：平顶光束 M^2因子 ABCD光学系统 聚焦特性 传输特性 

分 类 号：O43[机械工程—光学工程]