Tb/s Transmission in Sustainable and Flexible Beyond-5G Metro Access Networks

Paola Parolari, Alberto Gatto, Federico Lipparini, Michela Svaluto Moreolo, Joseph Maria Fabrega, Christian Neumeyr, Giovanni Delrosso, Benjamin Puttnam, Massimiliano Severi, Pierpaolo Boffi

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Tb/s transmission matching the requirements of future beyond 5-G mobile systems and high-throughput services in the future sustainable metro/access network is demonstrated. An innovative photonic transmitter module of a bandwidth/bitrate variable transceiver has been designed and developed integrating multiple directly modulated long-wavelength InP vertical cavity surface emitting lasers (VCSELs) in a silicon-photonics platform. Multicarrier direct modulation of each VCSEL combined with dense WDM multiplexing with a modular approach provides flexibility in the transported capacity to match dynamic bandwidth allocation, fine granularity, and scalability according to a pay-as-you-grow scheme. The use of VCSELs directly modulated with discrete multitone (DMT) signals is a sustainable technological solution in terms of cost, power consumption and footprint. Moreover, the adoption of multi core fibers (MCFs) allows to also use the space dimension for multiplexing, perfectly matching the proposed modular approach and coping with the mobile systems increasing throughput in an effective way. Here we experiment the propagation over 129 km, including 21 km of a 7-core MCF, with 57 Gb/s capacity per DMT -modulated VCSEL channel and 25 GHz WDM spacing, demonstrating more than 1.2 Tb/s total throughput thanks to the proposed modular solution.

Original languageEnglish
Title of host publicationICC 2023 - IEEE International Conference on Communications
Subtitle of host publicationSustainable Communications for Renaissance
EditorsMichele Zorzi, Meixia Tao, Walid Saad
PublisherIEEE Institute of Electrical and Electronic Engineers
Number of pages6
ISBN (Electronic)9781538674628
Publication statusPublished - 2023
MoE publication typeA4 Article in a conference publication
Event2023 IEEE International Conference on Communications, ICC 2023 - Rome, Italy
Duration: 28 May 20231 Jun 2023


Conference2023 IEEE International Conference on Communications, ICC 2023


  • discrete multitone modulation
  • flexible modulation
  • metro-access networks
  • spatial division multiplexing
  • wavelength division multiplexing


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