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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 13 — Jul. 1, 2013
  • pp: 2277–2279

Helical-core fiber analog of a quarter-wave plate for orbital angular momentum

C. N. Alexeyev, B. P. Lapin, A. V. Volyar, and M. A. Yavorsky  »View Author Affiliations


Optics Letters, Vol. 38, Issue 13, pp. 2277-2279 (2013)
http://dx.doi.org/10.1364/OL.38.002277


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Abstract

We have studied the effect of a twist defect on the conversion of the fundamental mode (FM) into an optical vortex (OV) in a helical-core fiber (HCF). We have shown that if such a twist defect is situated in the middle of the HCF, which converts the FM into an OV, such a fiber system can continuously change the orbital angular momentum (OAM) of the output field from 0 to 1 (in a.u.). This control of the OAM is achieved by variation of the twist angle. In this action upon the OAM, this system has analogy with the quarter-wave plate, which is able to change the spin angular momentum. We also introduced the generalized Stokes parameters (SPs) and Poincaré sphere to visualize evolution of the superposition of states with zero and nonzero OAM. Connection of SPs with geometric characteristics of the location of singularity is made.

© 2013 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.1155) Fiber optics and optical communications : All-optical networks
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: May 8, 2013
Manuscript Accepted: May 21, 2013
Published: June 25, 2013

Citation
C. N. Alexeyev, B. P. Lapin, A. V. Volyar, and M. A. Yavorsky, "Helical-core fiber analog of a quarter-wave plate for orbital angular momentum," Opt. Lett. 38, 2277-2279 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-13-2277


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