High-capacity millimetre-wave communications with orbital angular momentum multiplexing

Yan, Y. et al. (2014) High-capacity millimetre-wave communications with orbital angular momentum multiplexing. Nature Communications, 5, 4876. (doi: 10.1038/ncomms5876) (PMID:25224763) (PMCID:PMC4175588)

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Publisher's URL: http://dx.doi.org/10.1038/ncomms5876


One property of electromagnetic waves that has been recently explored is the ability to multiplex multiple beams, such that each beam has a unique helical phase front. The amount of phase front ‘twisting’ indicates the orbital angular momentum state number, and beams with different orbital angular momentum are orthogonal. Such orbital angular momentum based multiplexing can potentially increase the system capacity and spectral efficiency of millimetre-wave wireless communication links with a single aperture pair by transmitting multiple coaxial data streams. Here we demonstrate a 32-Gbit s<sup>−1</sup> millimetre-wave link over 2.5 metres with a spectral efficiency of ~16 bit s<sup>−1</sup> Hz<sup>−1</sup> using four independent orbital–angular momentum beams on each of two polarizations. All eight orbital angular momentum channels are recovered with bit-error rates below 3.8 × 10<sup>−3</sup>. In addition, we demonstrate a millimetre-wave orbital angular momentum mode demultiplexer to demultiplex four orbital angular momentum channels with crosstalk less than −12.5 dB and show an 8-Gbit s<sup>−1</sup> link containing two orbital angular momentum beams on each of two polarizations.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Lavery, Professor Martin and Padgett, Professor Miles
Authors: Yan, Y., Xie, G., Lavery, M. P.J., Huang, H., Ahmed, N., Bao, C., Ren, Y., Cao, Y., Li, L., Zhao, Z., Molisch, A. F., Tur, M., Padgett, M. J., and Willner, A. E.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nature Communications
Publisher:Nature Publishing Group
ISSN (Online):2041-1723
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in Nature Communications 5:4876
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
549871Challenges in Orbital Angular MomentumMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/I012451/1P&A - PHYSICS & ASTRONOMY