20 Tbit/s Transmission Over 6860 km With Sub-Nyquist Channel Spacing

被引：65

作者：

Cai, Jin-Xing ^{[1
]}

Davidson, Carl R. ^{[1
]}

Lucero, Alan ^{[1
]}

Zhang, Hongbin ^{[1
]}

Foursa, Dmitri G. ^{[1
]}

Sinkin, Oleg V. ^{[1
]}

Patterson, William W. ^{[1
]}

Pilipetskii, Alexei N. ^{[1
]}

Mohs, Georg ^{[1
]}

Bergano, Neal S. ^{[1
]}

机构：

[1] TE Subsea Commun LLC, Eatontown, NJ 07724 USA

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2012年 / 30卷 / 04期

关键词：

Coherent communications; interchannel interference; intersymbol interference (ISI); maximum likelihood sequence estimation (MLSE); maximum a posteriori probability (MAP) detection; optical fiber communications; phase-shift keying (PSK); polarization-division multiplexing (PDM); wavelength division multiplexing (WDM);

D O I：

10.1109/JLT.2011.2179975

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrate that channel spacing can be reduced to values smaller than the Nyquist channel spacing over transoceanic distance. Modulation memory induced by constrained transmitter bandwidth together with multisymbol detection can reduce intersymbol interference for systems with sub-Nyquist channel spacing. We transmit 198 x 100 G bandwidth constrained polarization-division-multiplexed return-to-zero quaternary phase shift keying channels with 400% spectral efficiency over 6860 km using 52 km spans of 150 mu m(2) fiber and simple single-stage erbium-doped fiber amplifiers without any Raman amplification. We also show that 100 G coherent nonlinear performance scales differently with distance on uncompensated dispersion maps compared with direct detection transmission.

引用

页码：651 / 657

页数：7

共 20 条

[1] Joint Statistics and MLSD in Filtered Incoherent High-Speed Fiber-Optic Communications [J].