Single-carrier 400G 64QAM and 128QAM DWDM field trial transmission over metro legacy links

Ginni Khanna, Talha Rahman, Erik De Man, Emilio Riccardi, Annachiara Pagano, Anna Chiado Piat, Stefano Calabro, Bernhard Spinnler, Danish Rafique, Uwe Feiste, Huug De Waardt, Bernd Sommerkorn-Krombholz, Norbert Hanik, Tomislav Drenski, Marc Bohn, Antonio Napoli

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We report on the results of a field trial carried out on a Telecom Italia metro link, targeting short data center interconnect applications. The test-bed presented realistic transmission conditions, such as an average 0.3-dB/km attenuation and usage of legacy erbium-doped fiber amplifier (EDFA) only. We transmitted a net bit rate of 400 Gb/s on a single carrier with 64 quadrature amplitude modulation (QAM) and 128QAM over 156 km. Error-free transmission over 80 km for single carrier dense wavelength-division multiplexing (DWDM) 30 × 400 G 64QAM and 30 × 400 G 128QAM (one half of the C-band) is reported. The net spectral efficiency, for both schemes, is 7.11 b/s/Hz.

Original languageEnglish
Article number7756309
Pages (from-to)189-192
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number2
Publication statusPublished - 15 Jan 2017


  • data center interconnects
  • digital pre-distortion
  • Digital signal processing
  • high-order modulation formats


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