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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4360–4363

Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization

Hao Huang, Yinwen Cao, Guodong Xie, Yongxiong Ren, Yan Yan, Changjing Bao, Nisar Ahmed, Mark A. Neifeld, Samuel J. Dolinar, and Alan E. Willner  »View Author Affiliations


Optics Letters, Vol. 39, Issue 15, pp. 4360-4363 (2014)
http://dx.doi.org/10.1364/OL.39.004360


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Abstract

We demonstrate crosstalk mitigation using 4×4 multiple-input-multiple-output (MIMO) equalization on an orbital angular momentum (OAM) multiplexed free-space data link with heterodyne detection. Four multiplexed OAM beams, each carrying a 20Gbit/s quadrature phase-shift keying signal, propagate through weak turbulence. The turbulence induces inter-channel crosstalk among each beam and degrades the signal performance. Experimental results demonstrate that with the assistance of MIMO processing, the signal quality and the bit-error-rate (BER) performance can be improved. The power penalty can be reduced by >4dB at a BER of 3.8×103.

© 2014 Optical Society of America

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(040.2840) Detectors : Heterodyne
(060.2605) Fiber optics and optical communications : Free-space optical communication
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 21, 2014
Revised Manuscript: June 11, 2014
Manuscript Accepted: June 11, 2014
Published: July 21, 2014

Citation
Hao Huang, Yinwen Cao, Guodong Xie, Yongxiong Ren, Yan Yan, Changjing Bao, Nisar Ahmed, Mark A. Neifeld, Samuel J. Dolinar, and Alan E. Willner, "Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization," Opt. Lett. 39, 4360-4363 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-15-4360


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