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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 21 — Nov. 1, 2012
  • pp: 4552–4554

Study of the birth of a vortex at Fraunhofer zone

Alcenisio J. Jesus-Silva, Eduardo J. S. Fonseca, and Jandir M. Hickmann  »View Author Affiliations


Optics Letters, Vol. 37, Issue 21, pp. 4552-4554 (2012)
http://dx.doi.org/10.1364/OL.37.004552


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Abstract

We analytically and experimentally study the Fraunhofer diffraction of an optical vortex beam possessing noninteger values of the azimuthal index. We show that the Fraunhofer diffraction of this beam presents the birth of a vortex at α=n+ε, where n is an integer number and ε is a small fraction. We discuss this behavior on the basis of the born vortex movement from a position of low intensity to high intensity when α is increased of an integer number in fractional steps of ε.

© 2012 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(140.3300) Lasers and laser optics : Laser beam shaping
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 28, 2012
Revised Manuscript: July 26, 2012
Manuscript Accepted: October 3, 2012
Published: October 31, 2012

Citation
Alcenisio J. Jesus-Silva, Eduardo J. S. Fonseca, and Jandir M. Hickmann, "Study of the birth of a vortex at Fraunhofer zone," Opt. Lett. 37, 4552-4554 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-21-4552


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