J4 ›› 2010, Vol. 27 ›› Issue (4): 393-396.

• 基础光学 • 上一篇    下一篇

涡旋光束经过环形孔径的衍射特性的研究

李阳月,刘辉,蒲继雄   

  1. 福建华侨大学信息科学与工程学院, 福建 泉州 362021
  • 收稿日期:2009-09-04 修回日期:2009-09-21 出版日期:2010-07-28 发布日期:2010-06-13
  • 通讯作者: 蒲继雄(1962-),硕士生导师,主要研究领域为基础光学、非线性光学、大气光学等。 E-mail:jixiong@hqu.edu.cn
  • 作者简介:李阳月(1985-),女,硕士生,主要从事光束传输方面的研究工作。Email:liyangyue33@163.com
  • 基金资助:

    福建省科技计划重点项目(2007H0027), 福建省自然科学基金 ( A0810012), 华侨大学科研基金项目 (Grant No. 08HZR14)

Analysis of diffraction characteristics of vortex beam through the circular aperture

LI Yang-yue, LIU Hui, PU Ji-xiong   

  1. College of Information Science and Engineering, Huaqiao University,Quanzhou 362021, China
  • Received:2009-09-04 Revised:2009-09-21 Published:2010-07-28 Online:2010-06-13

摘要:

对涡旋光束经过环形孔径之后的衍射特性进行了研究。从理论和实验上研究了涡旋光束经过环形孔径的衍射情况,考虑了整数阶涡旋光束和分数阶涡旋光束的衍射光强图,并讨论了拓扑电荷数对衍射图样的影响。研究表明,拓扑电荷数与光强分布紧密相关,这一现象可以用于测定涡旋光束拓扑电荷数。

关键词: 物理光学, 涡旋光束, 环形孔径衍射, 拓扑电荷数

Abstract:

The diffraction characteristics of vortex beam is studied through the circular aperture. The diffraction of vortex beam through a circular aperture is investigated theoretically and experimentally. The influence of the topological charge (including integer and fraction) of vortex beams on the diffractive pattern are studied in great detail. It is shown that the value of topological charge is closely related to the distribution of intensity, the results may have potential application in determination the topological charge of vortex beams.

Key words: physical optics; vortex beam; circular aperture interference; topological charge