Ultra-Long-Haul High-Capacity Super-Nyquist-WDM Transmission Experiment Using Multi-Core Fibers

This paper describes promising techniques for approaching the capacity-distance product over 1 Exabit/s×km in the transoceanic-class optical fiber transmission. One is the Super-Nyquist wavelength-division multiplexing (WDM) technique based on poly-binary-pulse shaping with maximum likelihood sequence estimation, in which it is possible to multiplex optical signals with WDM spacing of less than the signal baudrate. Another technique is the space-division multiplexing technique based on multi-core fibers (MCFs) with multi-core Erbium-doped fiber amplifiers (EDFAs), in which the fiber capacity can be increased when the number of cores of MCF is increased. Finally, we present a demonstration of 140.7-Tbit/s, 7 326-km transmission of 201-channel 25-GHz-spaced Super-Nyquist-WDM 100-Gbit/s optical signals using seven-core fibers and full C-band seven-core EDFAs.

[1]  Toshio Morioka,et al.  1.01-Pb/s (12 SDM/222 WDM/456 Gb/s) Crosstalk-managed Transmission with 91.4-b/s/Hz Aggregate Spectral Efficiency , 2012 .

[2]  S. Chandrasekhar,et al.  WDM/SDM transmission of 10 × 128-Gb/s PDM-QPSK over 2688-km 7-core fiber with a per-fiber net aggregate spectral-efficiency distance product of 40,320 kmb/s/Hz , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[3]  Takehiro Tsuritani,et al.  First Demonstration of MC-EDFA-Repeatered SDM Transmission of 40 × 128-Gbit/s PDM-QPSK Signals per Core over 6,160-km 7-core MCF , 2012 .

[4]  B Zhu,et al.  Amplification and noise properties of an erbium-doped multicore fiber amplifier. , 2011, Optics express.

[5]  P. Winzer.  Energy-Efficient Optical Transport Capacity Scaling Through Spatial Multiplexing , 2011, IEEE Photonics Technology Letters.

[6]  Zhao Yang Dong,et al.  Transmission of 20×440-Gb/s super-nyquist-filtered signals over 3600 km based on single-carrier 110-GBaud PDM QPSK with 100-GHz grid , 2014, OFC 2014.

[7]  N. S. Bergano,et al.  200 Gb/s and dual-wavelength 400 Gb/s transmission over transpacific distance at 6 b/s/Hz spectral efficiency , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[8]  Jianqiang Li,et al.  Approaching Nyquist Limit in WDM Systems by Low-Complexity Receiver-Side Duobinary Shaping , 2012, Journal of Lightwave Technology.

[9]  N. Wada,et al.  19-core fiber transmission of 19×100×172-Gb/s SDM-WDM-PDM-QPSK signals at 305Tb/s , 2012, OFC/NFOEC.

[10]  Masataka Nakazawa,et al.  1024 QAM (60 Gbit/s) single-carrier coherent optical transmission over 150 km. , 2012, Optics express.

[11]  Takehiro Tsuritani,et al.  110.9-Tbit/s SDM transmission over 6,370 km using a full C-band seven-core EDFA. , 2013, Optics express.

[12]  L. Nelson,et al.  Space-division multiplexing in optical fibres , 2013, Nature Photonics.

[13]  S. Chandrasekhar,et al.  1705-km transmission over coupled-core fibre supporting 6 spatial modes , 2014, 2014 The European Conference on Optical Communication (ECOC).

[14]  K. Kikuchi,et al.  Phase-diversity homodyne detection of multilevel optical modulation with digital carrier phase estimation , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[15]  J.-X Cai,et al.  Transmission over 9,100 km with a capacity of 49.3 Tb/s using variable spectral efficiency 16 QAM based coded modulation , 2014, OFC 2014.

[16]  K. Shikama,et al.  Physical-contact conditions for multicore fiber optical connectors , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[17]  Raman Kashyap,et al.  Observation of catastrophic self-propelled self-focusing in optical fibres , 1988 .

[18]  J.-X Cai,et al.  54 Tb/s transmission over 9,150 km with optimized hybrid Raman-EDFA amplification and coded modulation , 2014, 2014 The European Conference on Optical Communication (ECOC).

[19]  Gabriella Bosco,et al.  Performance Limits of Nyquist-WDM and CO-OFDM in High-Speed PM-QPSK Systems , 2010, IEEE Photonics Technology Letters.

[20]  A. Gnauck,et al.  Penalties from in-band crosstalk for advanced optical modulation formats , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[21]  E. Ip,et al.  High capacity field trials of 40.5 Tb/s for LH distance of 1,822 km and 54.2 Tb/s for regional distance of 634 km , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[22]  N. S. Bergano,et al.  20 Tbit/s capacity transmission over 6,860 km , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[23]  Takehiro Tsuritani,et al.  Super-Nyquist-WDM transmission over 7,326-km seven-core fiber with capacity-distance product of 1.03 Exabit/s · km. , 2014, Optics express.

[24]  B Zhu,et al.  Cladding-pumped erbium-doped multicore fiber amplifier. , 2012, Optics express.

[25]  Takehiro Tsuritani,et al.  1.03-Exabit/s.km Super-Nyquist-WDM Transmission over 7,326-km Seven-Core Fiber , 2013 .

[26]  T. Mizuochi,et al.  Recent progress in forward error correction and its interplay with transmission impairments , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[27]  Ryuichi Sugizaki,et al.  Simultaneous 7-core pumped amplification in multicore EDF through fibre based fan-in/out , 2012, 2012 38th European Conference and Exhibition on Optical Communications.

[28]  Chao Zhang,et al.  Novel FIR-filter configuration tolerant to fast phase fluctuations in digital coherent receivers for higher-order QAM signals , 2012, OFC/NFOEC.

[29]  P. Winzer,et al.  Capacity Limits of Optical Fiber Networks , 2010, Journal of Lightwave Technology.

[30]  T. Kawanishi,et al.  109-Tb/s (7×97×172-Gb/s SDM/WDM/PDM) QPSK transmission through 16.8-km homogeneous multi-core fiber , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[31]  Jin-Xing Cai,et al.  30 Tb/s Transmission over 6,630 km Using 16QAM Signals at 6.1 bits/s/Hz Spectral Efficiency , 2012 .

[32]  T Tsuritani,et al.  First demonstration of MC-EDFA-repeatered SDM transmission of 40 x 128-Gbit/s PDM-QPSK signals per core over 6,160-km 7-core MCF. , 2013, Optics express.

[33]  G. David Forney,et al.  Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference , 1972, IEEE Trans. Inf. Theory.

[34]  John G. Proakis,et al.  Digital Communications , 1983 .

[35]  Ivan B. Djordjevic,et al.  30.6-Tb/s full-duplex bidirectional transoceanic transmission over 75×90.9-km fiber spans , 2014, OFC 2014.

[36]  Amirhossein Ghazisaeidi,et al.  38.75 Tb/s transmission experiment over transoceanic distance , 2013 .

[37]  Amirhossein Ghazisaeidi,et al.  52.9 Tb/s transmission over transoceanic distances using adaptive multi-rate FEC , 2014, 2014 The European Conference on Optical Communication (ECOC).

[38]  S. Randel,et al.  Coherent 1200-km 6×6 MIMO mode-multiplexed transmission over 3-core microstructured fiber , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[39]  Ivan B. Djordjevic,et al.  30Tb/s C- and L-bands bidirectional transmission over 10,181km with 121km span length. , 2013, Optics express.

[40]  Takayuki Kobayashi,et al.  2 × 344 Tb/s propagation-direction interleaved transmission over 1500-km MCF enhanced by multicarrier full electric-field digital back-propagation , 2013 .

[41]  K. Takenaga,et al.  Large-effective-area uncoupled 10-core fiber with two-pitch layout , 2012, OFC/NFOEC.

[42]  K. Takenaga,et al.  Reduction of crosstalk by trench-assisted multi-core fiber , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[43]  Fan Yu,et al.  LDPC convolutional codes using layered decoding algorithm for high speed coherent optical transmission , 2012, OFC/NFOEC.

[44]  K. Takenaga,et al.  Mode discrimination and bending properties of four-core homogeneous coupled multi-core fiber , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[45]  S. Bigo,et al.  31 Tb/s transmission over 7,200 km using 46 Gbaud PDM-8QAM with optimized error correcting code rate , 2013, 2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS).

[46]  Ryuichi Sugizaki,et al.  Multi-core fibers for large capacity SDM , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[47]  Ryuichi Sugizaki,et al.  Batch multicore amplification with cladding-pumped multicore EDF , 2012, 2012 38th European Conference and Exhibition on Optical Communications.

[48]  Alexei N. Pilipetskii,et al.  44.1 Tb/s transmission over 9,100 km using coded modulation based on 16QAM signals at 4.9 bits/s/Hz , 2013 .