January 01, 2017

Trans-Atlantic Field Trial Using High Spectral Efficiency Probabilistically Shaped 64-QAM and Single-Carrier Real-Time 250-Gb/s 16-QAM

  • Adamiecki A.
  • Burrows E.
  • Chen X.
  • Cho J.
  • Correa D.
  • Corteselli S.
  • Dar R.
  • Grubb S.
  • Mckay B.
  • Pan Y.
  • Raybon G.
  • Schmalen L.
  • Sethumadhavan C.
  • Winzer P.
  • Zsigmond S.

We report the transmission of probabilistically shaped (PS) 64-ary quadrature amplitude modulation (QAM) at 7.46 b/s/Hz over a 5,523-km in-service trans-Atlantic fiber-optic cable that consists of 65 89-km spans of EDFA-only amplified fiber. Using a looped-back system configuration, we achieve 5.68 b/s/Hz over a trans-Pacific-equivalent distance of 11,046 km. Net spectral efficiencies are increased by 18% and 80% by using PS, at 5,523 km and 11,046 km, respectively, compared to uniform square QAM. Throughout our experiments, we pay particular attention that our claims are backed by actually implementable forward error correction schemes. In addition, we demonstrate real-time coherent transmission of single-carrier 200-Gb/s and 250-Gb/s uniform 8-QAM and 16-QAM at 4 b/s/Hz over the 5,523-km cable.

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Recent Publications

January 01, 2019

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  • Bron M.
  • Chute M.
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© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

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  • Aiello L.
  • Djuric N.
  • Grbovic M.
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  • Lerman K.
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© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

January 01, 2019

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  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...