January 01, 2018

1.6 Tbps Virtual-Carrier Assisted WDM Direct Detection Transmission over 1200 km

  • Buchali F.
  • Buelow H.
  • Schuh K.
  • Thai Le S.

Single-sideband (SSB) self-coherent detection (SCD) has attracted a lot of attention recently as a promising technology for short and medium reach optical transmission systems, such as data center interconnect (DCI) and metro applications, due to the low cost, the compact module size and the possibility of electrical dispersion compensation (EDC). In addition, it has been shown that SSB SCD can be effectively realized using a "virtual carrier" which is generated digitally together with the information-bearing signal to significantly simplify the hardware implementation. In this paper, we present an experimental demonstration of an 8×256 Gb/s WDM SSB SCD transmission with virtual carriers over a record distance of 1200 km with Corning TXF fiber. To achieve this performance, two digital linearization techniques have been considered and compared, namely the Kramers-Kronig (KK) field reconstruction and iterative signal-signal beat interference cancellation (SSBIC). Furthermore, we introduce a novel scheme called DC-offset KK to minimize the performance penalty associated with filtering and resampling process of the conventional KK scheme.

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Recent Publications

January 01, 2019

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 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, ...

January 01, 2019

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 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

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • 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 ...