TY - JOUR
T1 - Super-Nyquist-WDM transmission over 7,326-km seven-core fiber with capacity-distance product of 1.03 Exabit/s.km
AU - Igarash, Koji
AU - Tsuritani, Takehiro
AU - Morita, Itsuro
AU - Tsuchida, Yukihiro
AU - Maeda, Koichi
AU - Tadakuma, Masateru
AU - Saito, Tsunetoshi
AU - Watanabe, Kengo
AU - Imamura, Katsunori
AU - Sugizaki, Ryuichi
AU - Suzuki, Masatoshi
PY - 2014/1/27
Y1 - 2014/1/27
N2 - We show super-Nyquist-WDM transmission technique, where optical signals with duobinary-pulse shaping can be wavelengthmultiplexed with frequency spacing of below baudrate. Duobinary-pulse shaping can reduce the signal bandwidth to be a half of baudrate while controlling inter-symbol interference can be compensated by the maximum likelihood sequence estimation in a receiver. First, we experimentally evaluate crosstalk characteristics as a function of channel spacing between the dual-channel DP-QPSK signals with duobinary-pulse shaping. As a result, the crosstalk penalty can be almost negligible as far as the ratio of baudrate to frequency spacing is maintained to be less than 1.20. Next, we demonstrate 140.7-Tbit/s, 7,326-km transmission of 7 × 201-channel 25- GHz-spaced super-Nyquist-WDM 100-Gbit/s optical signals using sevencore fiber and full C-band seven-core EDFAs. To the best of our knowledge, this is one of the first reports of high-capacity transmission experiments with capacity-distance product in excess of 1 Exabit/s.km.
AB - We show super-Nyquist-WDM transmission technique, where optical signals with duobinary-pulse shaping can be wavelengthmultiplexed with frequency spacing of below baudrate. Duobinary-pulse shaping can reduce the signal bandwidth to be a half of baudrate while controlling inter-symbol interference can be compensated by the maximum likelihood sequence estimation in a receiver. First, we experimentally evaluate crosstalk characteristics as a function of channel spacing between the dual-channel DP-QPSK signals with duobinary-pulse shaping. As a result, the crosstalk penalty can be almost negligible as far as the ratio of baudrate to frequency spacing is maintained to be less than 1.20. Next, we demonstrate 140.7-Tbit/s, 7,326-km transmission of 7 × 201-channel 25- GHz-spaced super-Nyquist-WDM 100-Gbit/s optical signals using sevencore fiber and full C-band seven-core EDFAs. To the best of our knowledge, this is one of the first reports of high-capacity transmission experiments with capacity-distance product in excess of 1 Exabit/s.km.
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U2 - 10.1364/OE.22.001220
DO - 10.1364/OE.22.001220
M3 - Article
AN - SCOPUS:84893414998
SN - 1094-4087
VL - 22
SP - 1220
EP - 1228
JO - Optics Express
JF - Optics Express
IS - 2
ER -