Dual-Carrier 1-Tb/s Transmission Over Field-Deployed G.654.E Fiber Link Using Real-Time Transponder

Fukutaro HAMAOKA  Takeo SASAI  Kohei SAITO  Takayuki KOBAYASHI  Asuka MATSUSHITA  Masanori NAKAMURA  Hiroki TANIGUCHI  Shoichiro KUWAHARA  Hiroki KAWAHARA  Takeshi SEKI  Josuke OZAKI  Yoshihiro OGISO  Hideki MAEDA  Yoshiaki KISAKA  Masahito TOMIZAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E103-B   No.11   pp.1183-1189
Publication Date: 2020/11/01
Publicized: 2020/05/29
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019OBI0003
Type of Manuscript: INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical fiber communication,  digital coherent transmission,  real-time transmission,  field transmission,  

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Summary: 
We demonstrated 1-Tb/s-class transmissions of field-deployed large-core low-loss fiber links, which is compliant with ITU-T G.654.E, using our newly developed real-time transponder consisting of a state-of-the-art 16-nm complementary metal-oxide-semiconductor (CMOS) based digital signal processing application-specific integrated circuit (DSP-ASIC) and an indium phosphide (InP) based high-bandwidth coherent driver modulator (HB-CDM). In this field experiment, we have achieved record transmission distances of 1122km for net data-rate 1-Tb/s transmission with dual polarization-division multiplexed (PDM) 32 quadrature amplitude modulation (QAM) signals, and of 336.6 km for net data-rate 1.2-Tb/s transmission with dual PDM-64QAM signals. This is the first demonstration of applying hybrid erbium-doped fiber amplifier (EDFA) and backward-distributed Raman amplifier were applied to terrestrial G.654.E fiber links. We also confirmed the stability of signal performance over field fiber transmission in wavelength division multiplexed (WDM) condition. The Q-factor fluctuations respectively were only less than or equal to 0.052dB and 0.07dB for PDM-32QAM and PDM-64QAM signals within continuous measurements for 60 minutes.