Super-Nyquist-WDM transmission over 7,326-km seven-core fiber with capacity-distance product of 103 Exabit/s·km | Zendy

Koji Igarashi | Zendy; Takehiro Tsuritani | Zendy; Itsuro Morita | Zendy; Yukihiro Tsuchida | Zendy; Koichi Maeda | Zendy; Masateru Tadakuma | Zendy; Tsunetoshi Saito | Zendy; Kengo Watanabe | Zendy; Katsunori Imamura | Zendy; Ryuichi Sugizaki | Zendy; Masatoshi Suzuki | Zendy

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Super-Nyquist-WDM transmission over 7,326-km seven-core fiber with capacity-distance product of 103 Exabit/s·km

Author(s) -

Koji Igarashi,

Takehiro Tsuritani,

Itsuro Morita,

Yukihiro Tsuchida,

Koichi Maeda,

Masateru Tadakuma,

Tsunetoshi Saito,

Kengo Watanabe,

Katsunori Imamura,

Ryuichi Sugizaki,

Masatoshi Suzuki

Publication year - 2014

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.22.001220

Subject(s) - optics , wavelength division multiplexing , channel spacing , nyquist–shannon sampling theorem , physics , terabit , multiplexing , transmission (telecommunications) , bandwidth (computing) , telecommunications , computer science , wavelength , electronic engineering , engineering

We show super-Nyquist-WDM transmission technique, where optical signals with duobinary-pulse shaping can be wavelength-multiplexed 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 seven-core 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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