First demonstration of digital coherent transmission in a deployed ROADM network with a 120 Gbit/s polarizationmultiplexed 64 QAM signal

Toshihiko Hirooka, Keisuke Kasai, Yixin Wang, Masataka Nakazawa, Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada

Research output: Contribution to journalLetterpeer-review

1 Citation (Scopus)

Abstract

We demonstrate the add/drop operation and transmission of 120 Gbit/s (10 Gsymbol/s) polarization-multiplexed (PDM) 64 QAM digital coherent signals in a deployed ROADM network. By equalizing waveform distortions at the ROADM node with an FIR filter, the QAM signal was successfully add/drop-multiplexed, and transmitted over a 50 km ring network testbed with neighboring 9 × 10 Gbit/s OOK WDM data. This indicates the applicability of digital coherent systems to the deployed ROADM network based on 10 Gbit/s OOK, and its upgradability to 120 Gbit/s PDM- 64 QAM.

Original languageEnglish
JournalIEICE Electronics Express
Volume12
Issue number23
DOIs
Publication statusPublished - 2015 Nov 19

Keywords

  • Digital coherent transmission
  • QAM
  • ROADM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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