Ahmed, N. et al. (2016) Mode-division-multiplexing of multiple Bessel-Gaussian beams carrying orbital-angular-momentum for obstruction-tolerant free-space optical and millimetre-wave communication links. Scientific Reports, 6, 22082. (doi: 10.1038/srep22082) (PMID:26926068) (PMCID:PMC4772084)
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Abstract
We experimentally investigate the potential of using ‘self-healing’ Bessel-Gaussian beams carrying orbital-angular-momentum to overcome limitations in obstructed free-space optical and 28-GHz millimetre-wave communication links. We multiplex and transmit two beams (l = +1 and +3) over 1.4 metres in both the optical and millimetre-wave domains. Each optical beam carried 50-Gbaud quadrature-phase-shift-keyed data, and each millimetre-wave beam carried 1-Gbaud 16-quadrature-amplitude-modulated data. In both types of links, opaque disks of different sizes are used to obstruct the beams at different transverse positions. We observe self-healing after the obstructions, and assess crosstalk and power penalty when data is transmitted. Moreover, we show that Bessel-Gaussian orbital-angular-momentum beams are more tolerant to obstructions than non-Bessel orbital-angular-momentum beams. For example, when obstructions that are 1 and 0.44 the size of the l = +1 beam, are placed at beam centre, optical and millimetre-wave Bessel-Gaussian beams show ~6 dB and ~8 dB reduction in crosstalk, respectively.
| Item Type: | Articles |
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| Additional Information: | This work was supported by the Intel under the “5G: Higher Denser Wilder” program, and the NSF under ECCS-1509965 and MRI-1126732. M.P.J.L.is support by Royal Academy of Engineering Research Fellowship. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lavery, Professor Martin |
| Authors: | Ahmed, N., Zhao, Z., Li, L., Huang, H., Lavery, M. P. J., Liao, P., Yan, Y., Wang, Z., Xie, G., Ren, Y., Almaiman, A., Willner, A. J., Ashrafi, S., Molisch, A. F., Tur, M., and Willner, A. E. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Scientific Reports |
| Publisher: | Nature Publishing Group |
| ISSN: | 2045-2322 |
| ISSN (Online): | 2045-2322 |
| Copyright Holders: | Copyright © 2016 The Authors |
| First Published: | First published in Scientific Report 6:22082 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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