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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 13 — May. 1, 2010
  • pp: 2456–2462

Analysis of fractional vortex beams using a vortex grating spectrum analyzer

Ning Zhang, Jeffrey A. Davis, Ignacio Moreno, Jiao Lin, Ken-Jin Moh, Don M. Cottrell, and Xiaocong Yuan  »View Author Affiliations


Applied Optics, Vol. 49, Issue 13, pp. 2456-2462 (2010)
http://dx.doi.org/10.1364/AO.49.002456


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Abstract

We demonstrate that an optical vortex with fractional topological charge can be approximated as a linear combination of the two adjacent integer topological charges. This theory is experimentally verified utilizing a vortex grating spectrum analyzer, i.e., a computer-generated hologram with a charge 1 vortex grating. By extracting the intensity value of the center portion of the target diffraction orders, both the number and the sign of the topological charge of any input vortex can be identified and analyzed.

© 2010 Optical Society of America

OCIS Codes
(100.5090) Image processing : Phase-only filters
(230.6120) Optical devices : Spatial light modulators
(350.2770) Other areas of optics : Gratings
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 19, 2010
Manuscript Accepted: March 24, 2010
Published: April 23, 2010

Citation
Ning Zhang, Jeffrey A. Davis, Ignacio Moreno, Jiao Lin, Ken-Jin Moh, Don M. Cottrell, and Xiaocong Yuan, "Analysis of fractional vortex beams using a vortex grating spectrum analyzer," Appl. Opt. 49, 2456-2462 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-13-2456

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