400Gbit/s/ch Field Demonstration of Modulation Format Adaptation Based on Pilot-Aided OSNR Estimation Using Real-Time DSP

Seiji OKAMOTO  Kazushige YONENAGA  Kengo HORIKOSHI  Mitsuteru YOSHIDA  Yutaka MIYAMOTO  Masahito TOMIZAWA  Takeshi OKAMOTO  Hidemi NOGUCHI  Jun-ichi ABE  Junichiro MATSUI  Hisao NAKASHIMA  Yuichi AKIYAMA  Takeshi HOSHIDA  Hiroshi ONAKA  Kenya SUGIHARA  Soichiro KAMETANI  Kazuo KUBO  Takashi SUGIHARA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E100-B   No.10   pp.1726-1733
Publication Date: 2017/10/01
Online ISSN: 1745-1345
Type of Manuscript: INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
adaptive modulation,  field trial,  real-time DSP,  400Gbit/s,  

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Summary: 
We describe a field experiment of flexible modulation format adaptation on a real-time 400Gbit/s/ch DSP-LSI. This real-time DSP-LSI features OSNR estimation, practical simplified back propagation, and high gain soft-decision forward error correction. With these techniques, we have successfully demonstrated modulation format allocation and transmission of 56-channel 400Gbit/s-2SC-PDM-16QAM and 200Gbit/s-2SC-PDM-QPSK signals in 216km and 3246km standard single mode fiber, respectively.