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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 23 — Dec. 1, 2011
  • pp: 4683–4685

Angular and radial mode analyzer for optical beams

Ayman F. Abouraddy, Timothy M. Yarnall, and Bahaa E.A. Saleh  »View Author Affiliations


Optics Letters, Vol. 36, Issue 23, pp. 4683-4685 (2011)
http://dx.doi.org/10.1364/OL.36.004683


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Abstract

We describe an approach to determining both the angular and the radial modal content of a scalar optical beam in terms of optical angular momentum modes. A modified Mach–Zehnder interferometer that incorporates a spatial rotator to determine the angular modes and an optical realization of the fractional Hankel transform (fHT) to determine the radial modes is analyzed. Varying the rotation angle and the order of the fHT produces a two-dimensional (2D) interferogram from which we extract the modal coefficients by simple 2D Fourier analysis.

© 2011 Optical Society of America

OCIS Codes
(030.4070) Coherence and statistical optics : Modes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(260.3160) Physical optics : Interference
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 28, 2011
Revised Manuscript: October 30, 2011
Manuscript Accepted: October 31, 2011
Published: December 1, 2011

Citation
Ayman F. Abouraddy, Timothy M. Yarnall, and Bahaa E. A. Saleh, "Angular and radial mode analyzer for optical beams," Opt. Lett. 36, 4683-4685 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-23-4683

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