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
Publicized: 2017/04/20
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017OBI0003
Type of Manuscript: Special Section 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,  

Full Text: FreePDF(4.3MB)

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.