Open AccessSingle-channel 200 Gbit/s, 10 Gsymbol/s-1024 QAM injection-locked coherent transmission over 160 km with a pilot-assisted adaptive equalizer
Author(s) -
Yixin Wang,
Seiji Okamoto,
Keisuke Kasai,
Masato Yoshida
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.017015
Subject(s) - quadrature amplitude modulation , qam , optics , transmission (telecommunications) , physics , adaptive equalizer , spectral efficiency , symbol rate , modulation (music) , bit error rate , electronic engineering , channel (broadcasting) , computer science , telecommunications , equalizer , acoustics , engineering
We demonstrate a 10 Gsymbol/s, 1024 quadrature amplitude modulation (QAM) 160 km coherent transmission with an injection locking technique. Our newly developed, pilot-assisted adaptive equalizer has greatly improved the precision of waveform distortion compensation, and this has enabled us to increase the symbol rate to 10 Gsymbol/s in a 1024 QAM transmission. Thus, we could realize a 200 Gbit/s, 1024 QAM transmission over 160 km with a potential spectral efficiency of 12.6 bit/s/Hz.