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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 16 — Aug. 15, 2012
  • pp: 3294–3296

Fiber structure to convert a Gaussian beam to higher-order optical orbital angular momentum modes

Yan Yan, Lin Zhang, Jian Wang, Jeng-Yuan Yang, Irfan M. Fazal, Nisar Ahmed, Alan E. Willner, and Samuel J. Dolinar  »View Author Affiliations


Optics Letters, Vol. 37, Issue 16, pp. 3294-3296 (2012)
http://dx.doi.org/10.1364/OL.37.003294


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Abstract

We propose a fiber structure of a square core and ring refractive index profile that converts an input circular polarized Gaussian mode into optical orbital angular momentum (OAM) modes. By breaking the circular symmetry of the waveguide, the input circularly polarized fundamental mode in the square core can be coupled into the ring region to generate higher-order OAM modes, corresponding to the transference of spin angular momentum and orbital angular momentum. We show, by using simulation, the generation of OAM modes with a topological charge l up to 9 using <10mm long fiber. The mode purity is above 96.4% and the extinction ratio can be 30 dB.

© 2012 Optical Society of America

OCIS Codes
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 23, 2012
Revised Manuscript: June 21, 2012
Manuscript Accepted: June 22, 2012
Published: August 2, 2012

Citation
Yan Yan, Lin Zhang, Jian Wang, Jeng-Yuan Yang, Irfan M. Fazal, Nisar Ahmed, Alan E. Willner, and Samuel J. Dolinar, "Fiber structure to convert a Gaussian beam to higher-order optical orbital angular momentum modes," Opt. Lett. 37, 3294-3296 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-16-3294


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