Vectorial structure of a hard-edged-diffracted four-petal Gaussian beam in the far field

OPTICS COMMUNICATIONS

卷:283

Article

Long, Xuewen^1,2  Lu, Keqing¹  Zhang, Yuhong^1,2  Guo, Jianbang^1,2  Li, Kehao^1,2 

[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

关键词: Four-petal Gaussian beam;    Vectorial structure;    Circular aperture;    Far field;   

DOI  :  10.1016/j.optcom.2010.06.097

来源: Elsevier

【 摘 要 】

Based on the vector angular spectrum method and the stationary phase method and the fact that a circular aperture function can be expanded into a finite sum of complex Gaussian functions, the analytical vectorial structure of a four-petal Gaussian beam (FPGB) diffracted by a circular aperture is derived in the far field The energy flux distributions and the diffraction effect introduced by the aperture are studied and illustrated graphically. Moreover, the influence of the f-parameter and the truncation parameter on the non-paraxiality is demonstrated in detail. In addition, the approximate formulas obtained in this paper can degenerate into un-apertured case when the truncation parameter tends to infinity. This work is beneficial to strengthen the understanding of vectorial properties of the FPGB diffracted by a circular aperture. (C) 2010 Elsevier B V All rights reserved

【 授权许可】

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