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

• Basic Optics • Previous Articles     Next Articles

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

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