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Single-wavelength polarization- and mode-division multiplexing free-space optical communication at 689 Gbit/s in strong turbulent channels

Yiming Li, Zhaozhong Chen, David M. Benton, Mohammed Patel, Martin P. J. Lavery, and Andrew D. Ellis

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Abstract

We experimentally demonstrated, for, it is believed, the first time, high-capacity polarization- and mode-division multiplexing free-space optical transmission with adequate strong turbulence resiliency. A compact spatial light modulator–based polarization multiplexing multi-plane light conversion module was employed to emulate strong turbulent links. By employing advanced successive interference cancellation multiple-input multiple-output decoder and redundant receive channels, the strong turbulence resiliency was significantly improved in a mode-division multiplexing system. As a result, we achieved a record-high line rate of 689.2 Gbit/s, channel number of 10, and net spectral efficiency of 13.9 bit/(s Hz) in a single-wavelength mode-division multiplexing system with strong turbulence.

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Data availability

Data underlying the results presented in this paper are available in Li [23].

23. Y. Li, “689 Gbps MDM FSO communication in strong turbulence data,” (2023). https://doi.org/10.17036/researchdata.aston.ac.uk.00000594.

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