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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 8 — Aug. 1, 2012
  • pp: 1968–1976

Measuring the topological charge of ultrabroadband, optical-vortex beams with a triangular aperture

Matthew E. Anderson, Heath Bigman, Luís E. E. de Araujo, and Jan L. Chaloupka  »View Author Affiliations

JOSA B, Vol. 29, Issue 8, pp. 1968-1976 (2012)

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A simple technique for determining the topological charge of supercontinuum optical vortices is presented. The spatial dispersion inherent to generating broadband vortices with a single forked grating is compensated with a double-pass arrangement from a single spatial light modulator. The vortex charge is determined by inspecting the diffraction pattern through a triangular aperture. It is shown that the topological charge is constant, and can be consistently measured, across a wide range of colors.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Diffraction and Gratings

Original Manuscript: February 8, 2012
Revised Manuscript: June 13, 2012
Manuscript Accepted: June 16, 2012
Published: July 16, 2012

Matthew E. Anderson, Heath Bigman, Luís E. E. de Araujo, and Jan L. Chaloupka, "Measuring the topological charge of ultrabroadband, optical-vortex beams with a triangular aperture," J. Opt. Soc. Am. B 29, 1968-1976 (2012)

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