Transmission Over Field-Deployed Standard Single-Mode Fibre Using $>$100 nm S+C+L-Band

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Abstract
A record transmission throughput of 202.3 Tb/s (189.5 Tb/s after decoding) is reported over a 39 km field-deployed metropolitan standard single-mode fibre link using ultra-wideband geometrically-shaped signals, with lumped amplification and total launch power constrained to 20.9 dBm. An experimentally-optimised 5 dB tilt launch power pre-emphasis over the 15.6 THz optical bandwidth was applied to mitigate inter-channel stimulated Raman scattering. Compared to C+L-band transmission, extension to S+C+L-band, using 63.4 % more optical bandwidth, resulted in a 51.2 % increase in throughput under the same total launch power constraint. The trade-off between the addition of S-band channels, and the associated reduction in C+L-band SNR, was further explored for long-haul transmission, and it was shown that a similar percentage throughput increase (from 48.1 Tb/s to 73.1 Tb/s), but with 77.3 % higher bandwidth, could be achieved for 1014 km transmission over field-deployed fibre configured in a recirculating fibre loop. This work demonstrates the potential to enhance data throughput in deployed fibre systems by using S+C+L-bands.
Funding Information
  • EPSRC Transforming Networks - building an Intelligent Optical Infrastructure (EP/R035342/1)
  • Extremely Wideband Optical Fibre Communication Systems (EP/W015714/1)
  • EPSRC Strategic Equipment (EP/V007734/1)
  • EPSRC Studentship (EP/T517793/1)

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