High spectral-efficiency DWDM transmission with mixed data rates and signal formats

Optical fiber transport networks have been evolving rapidly to meet the demands of today's telecommunications by providing unprecedented transmission capacity and reach. In dense wavelength-division-multiplexing (DWDM) transport systems, 10-Gb/s channels are widely deployed, and 40-Gb/s channels are starting to be added in the same systems. In the foreseeable future, 100-Gb/s channels are expected to be carried. The realization of such high spectral- efficiency DWDM systems with mixed data rates and signal formats presents several technical challenges. In this paper, we review these challenges and discuss promising technologies that may potentially address these challenges.

[1]  J. Khurgin,et al.  Investigation of 2-b/s/Hz 40-gb/s DWDM transmission over 4/spl times/100 km SMF-28 fiber using RZ-DQPSK and polarization multiplexing , 2004, IEEE Photonics Technology Letters.

[2]  Sethumadhavan Chandrasekhar,et al.  Self-coherent optical transport systems , 2008 .

[3]  Daniel A. Fishman,et al.  LambdaXtreme® transport system: R&D of a high capacity system for low cost, ultra long haul DWDM transport , 2006, Bell Labs Technical Journal.

[4]  T. Duthel,et al.  Carrier phase estimation for coherent equalization of 43-Gb/s POLMUX-NRZ-DQPSK transmission with 10.7-Gb/s NRZ neighbours , 2007 .

[5]  Gerhard Kramer,et al.  Spectral efficiency of coded phase-shift keying for fiber-optic communication , 2003 .

[6]  P. Mamyshev,et al.  Partial DPSK with excellent filter tolerance and OSNR sensitivity , 2006 .

[7]  S. Chandrasekhar,et al.  Impact of Channel Plan and Dispersion Map on Hybrid DWDM Transmission of 42.7-Gb/s DQPSK and 10.7-Gb/s OOK on 50-GHz Grid , 2007, IEEE Photonics Technology Letters.

[8]  Zhuhong Zhang,et al.  Wavelength Division Multiplexing (WDM) and Polarization Mode Dispersion (PMD) Performance of a Coherent 40Gbit/s Dual-Polarization Quadrature Phase Shift Keying (DP-QPSK) Transceiver , 2007, OFC 2007.

[9]  Xiang Liu,et al.  Athermal optical demodulator for OC-768 DPSK and RZ-DPSK signals , 2005, IEEE Photonics Technology Letters.

[10]  A. Gnauck,et al.  Hybrid 10/40-G transmission on a 50-GHz grid through 2800 km of SSMF and seven optical add-drops , 2005, IEEE Photonics Technology Letters.

[11]  Liang Du,et al.  Orthogonal Frequency Division Multiplexing for Adaptive Dispersion Compensation in Long Haul WDM Systems , 2006, 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference.

[12]  Xiang Liu,et al.  Direct Detection of 107-Gb/s Polarization-Multiplexed DQPSK with Electronic Polarization Demultiplexing , 2008, OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.

[13]  Xiang Liu,et al.  Suppression of XPM Penalty on 40-Gb/s DQPSK Resulting from 10-Gb/s OOK Channels by Dispersion Management , 2008, OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.

[14]  A. Price,et al.  Reduced bandwidth optical digital intensity modulation with improved chromatic dispersion tolerance , 1995 .

[15]  B. Lankl,et al.  High spectral efficiency 1.6-b/s/Hz transmission (8 x 40 Gb/s with a 25-GHz grid) over 200-km SSMF using RZ-DQPSK and polarization multiplexing , 2003, IEEE Photonics Technology Letters.

[16]  William Shieh,et al.  Coherent optical orthogonal frequency division multiplexing , 2006 .

[17]  J Renaudier,et al.  Performance comparison of singly-polarized and polarization-multiplexed at 10Gbaud under nonlinear impairments , 2008, OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.

[18]  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.

[19]  Kuang-Tsan Wu,et al.  Real-time measurements of a 40 Gb/s coherent system. , 2008, Optics express.

[20]  S. Jansen,et al.  1.6-b/s/Hz Spectrally Efficient Transmission Over 1700 km of SSMF Using 40 $\times$ 85.6-Gb/s POLMUX-RZ-DQPSK , 2007, Journal of Lightwave Technology.

[21]  Itsuro Morita,et al.  10x121.9-Gb/s PDM-OFDM Transmission with 2-b/s/Hz Spectral Efficiency over 1,000 km of SSMF , 2008 .

[22]  S. Bigo,et al.  Transmission of 16.4-bit/s Capacity Over 2550 km Using PDM QPSK Modulation Format and Coherent Receiver , 2008, Journal of Lightwave Technology.

[23]  Keang-Po Ho,et al.  Phase-Modulated Optical Communication Systems , 2005 .

[24]  T. Duthel,et al.  10 x 111 Gbit/s 50 GHz spaced, POLMUX-RZ-DQPSK transmission over 2375 km employing coherent equalisation , 2007, OFC 2007.

[25]  A.H. Gnauck,et al.  Optical phase-shift-keyed transmission , 2005, Journal of Lightwave Technology.

[26]  Tetsuya Kawanishi,et al.  10 x 107-Gb/s NRZ-DQPSK Transmission at 1.0 b/s/Hz over 12 x 100 km Including 6 Optical Routing Nodes , 2007, OFC 2007.

[27]  S. Bigo,et al.  Nonlinear Interactions Between 10Gb/s NRZ Channels and 40Gb/s Channels with RZ-DQPSK or PSBT Format, over Low-Dispersion Fiber , 2006, 2006 European Conference on Optical Communications.