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Mode division multiplexing using an orbital angular momentum mode sorter and MIMO-DSP over a graded-index few-mode optical fibre

Huang, Hao, Milione, Giovanni, Lavery, Martin P. J., Xie, Guodong, Ren, Yongxiong, Cao, Yinwen, Ahmed, Nisar, An Nguyen, Thien, Nolan, Daniel A., Li, Ming-Jun, Tur, Moshe, Alfano, Robert R., Willner, Alan E.·2015·Scientific Reports
DOI 10.1038/srep14931PMC PMC4598738
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Abstract

Mode division multiplexing (MDM)– using a multimode optical fiber’s N spatial modes as data channels to transmit N independent data streams – has received interest as it can potentially increase optical fiber data transmission capacity N-times with respect to single mode optical fibers. Two challenges of MDM are (1) designing mode (de)multiplexers with high mode selectivity (2) designing mode (de)multiplexers without cascaded beam splitting’s 1/N insertion loss. One spatial mode basis that has received interest is that of orbital angular momentum (OAM) modes. In this paper, using a device referred to as an OAM mode sorter, we show that OAM modes can be (de)multiplexed over a multimode optical fiber with higher than −15 dB mode selectivity and without cascaded beam splitting’s 1/N insertion loss. As a proof of concept, the OAM modes of the LP 11 mode group (OAM−1,0"Equation missing" and OAM+1,0), each carrying 20-Gbit/s polarization division multiplexed and quadrature phase shift keyed data streams, are transmitted 5km over a graded-index, few-mode optical fibre. Channel crosstalk is mitigated using 4 × 4 multiple-input-multiple-output digital-signal-processing with <1.5 dB power penalties at a bit-error-rate of 2 × 10−3.

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  • These results show a generalization to vector beams of the technique previously used with scalar vortex beams, which is now widely used as a mode sorter in vortex based communication systems.

    “These results thus show a generalization to vector beams of the technique previously used with scalar vortex beams11, which is now widely used as a mode sorter in vortex based communication systems4, 9.”

    From Vector Beam Polarization State Spectrum Analyzer (2017) · cites this paper as [9]

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Research works printed but not linked: 33

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Metadata

Authors
Huang, H., Milione, G., Lavery, M. P. J., Xie, G., Ren, Y., Cao, Y., Ahmed, N., An Nguyen, T., Nolan, D. A., Li, M.-J., Tur, M., Alfano, R. R., & Willner, A. E.
Venue
Scientific Reports
Publisher
Springer Science and Business Media LLC
Published
2015-10-09
Volume
5
Issue
1
ISSN
2045-2322
DOI
10.1038/srep14931
PMC
PMC4598738
Cited by
254
References
1
Language
en
Licence

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