矢量圆对称Airy光束传输特性研究  

Vector propagation dynamics of the circular Airy beams

作　　者：曹伦 耿滔[1,2,3] CAO Lun;GENG Tao(Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China;Engineering Research Center of Optical Instrument and System（MOE）,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学上海市现代光学系统重点实验室,上海200093 [2]上海理工大学教育部光学仪器与系统工程研究中心,上海200093 [3]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2018年第3期46-51,共6页Optical Instruments

基　　金：国家重点基础研究发展计划(973计划)(2015CB352001);国家自然科学基金(61008044);上海市自然科学基金(16ZR144600)

摘　　要：以径向偏振圆对称Airy光束为例,基于Rayleigh-Sommerfeld矢量衍射理论,探讨了矢量圆对称Airy光束的传输特性。随着光束波长增大其自聚焦焦距减小,光束等效数值孔径增大。与傍轴理论计算结果比较后发现,当等效数值孔径大于0.09时,傍轴理论不再适用,因为此时傍轴理论低估了光波的衍射效应和矢量性。In this paper,the vector propagation dynamics of the radially circular Airy beams have been studied based on Rayleigh-Sommerfeld integration.With the increase of the wavelength the focal length of self-focusing will decrease and the equivalent numerical aperture will increase.It is found that the paraxial theory is valid when the equivalent numerical aperture is less than 0 . 09 by comparing with the calculation results of Rayleigh-Sommerfeld integration.The paraxial theory under estimates the diffraction effect and the vector property of light waves.Thus,paraxial theory can ’ t be used for tightly focused systems.

关 键 词：圆对称艾里光束 自聚焦 径向偏振 

分 类 号：O436.1[机械工程—光学工程]