On the Limits of Digital Back-Propagation in Fully Loaded WDM Systems

We investigate upper bounds for single-channel and multi-channel digital back-propagation (BP) in fully loaded wavelength-division multiplexed systems. Using the time-domain model for nonlinear interference noise, we expand previous estimates of BP gains to accurately cover a wide range of system configurations, including a variety of modulation formats from quadrature phase-shift keying to 256-ary quadrature amplitude modulation. In typical scenarios, the potential benefit of singlechannel BP is limited to ~0.5 dB in terms of the peak signal-tonoise ratio, and to ~1 and ~1.2 dB in the case of joint threeand five-channel BP. The additional gain from increasing the number of jointly back-propagated channels beyond five is limited to ~0.1 dB per additional back-propagated channel. We also study the role of BP for receivers that separately compensate for nonlinear phase and polarization rotation noise and show that while the additional gain provided by BP does not change significantly in long-haul systems, it holds the promise of being notably higher in short-reach ultra-high-capacity systems.

[1]  P. J. Winzer,et al.  Fibre nonlinearities in electronically pre-distorted transmission , 2005 .

[2]  J. Kahn,et al.  Compensation of Dispersion and Nonlinear Impairments Using Digital Backpropagation , 2008, Journal of Lightwave Technology.

[3]  Takeshi Hoshida,et al.  Nonlinear polarization crosstalk canceller for dual-polarization digital coherent receivers , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[4]  Pierluigi Poggiolini,et al.  Impact of Interchannel Nonlinearities on a Split-Step Intrachannel Nonlinear Equalizer , 2010, IEEE Photonics Technology Letters.

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

[6]  Xi Chen,et al.  Closed-form expressions for nonlinear transmission performance of densely spaced coherent optical OFDM systems. , 2010, Optics express.

[7]  D. Rafique,et al.  Impact of signal-ASE four-wave mixing on the effectiveness of digital back-propagation in 112 Gb/s PM-QPSK systems. , 2011, Optics express.

[8]  Zhenning Tao,et al.  Multiplier-Free Intrachannel Nonlinearity Compensating Algorithm Operating at Symbol Rate , 2011, Journal of Lightwave Technology.

[9]  M. Kuschnerov,et al.  Impact of Channel Count and PMD on Polarization-Multiplexed QPSK Transmission , 2011, Journal of Lightwave Technology.

[10]  T. Tanimura,et al.  Analytical results on back propagation nonlinear compensator with coherent detection. , 2012, Optics express.

[11]  R. Essiambre,et al.  Nonlinear Shannon Limit in Pseudolinear Coherent Systems , 2012, Journal of Lightwave Technology.

[12]  Xi Chen,et al.  Influence of PMD on fiber nonlinearity compensation using digital back propagation. , 2012, Optics express.

[13]  Ronen Dar,et al.  Properties of nonlinear noise in long, dispersion-uncompensated fiber links , 2013, Optics express.

[14]  Marco Secondini,et al.  Enhanced split-step Fourier method for digital backpropagation , 2014, 2014 The European Conference on Optical Communication (ECOC).

[15]  Amirhossein Ghazisaeidi,et al.  Calculation of coefficients of perturbative nonlinear pre-compensation for Nyquist pulses , 2014, 2014 The European Conference on Optical Communication (ECOC).

[16]  M. Feder,et al.  Accumulation of nonlinear interference noise in fiber-optic systems. , 2013, Optics express.

[17]  P. Poggiolini,et al.  The GN-Model of Fiber Non-Linear Propagation and its Applications , 2014, Journal of Lightwave Technology.

[18]  Xiaojun Liang,et al.  Multi-stage perturbation theory for compensating intra-channel nonlinear impairments in fiber-optic links. , 2014, Optics express.

[19]  Ronen Dar,et al.  Pulse collision picture of inter-channel nonlinear interference noise in fiber-optic communications , 2014 .

[20]  Gabriella Bosco,et al.  EGN model of non-linear fiber propagation. , 2014, Optics express.

[21]  H. Zhang,et al.  200 Gb/s and Dual Wavelength 400 Gb/s Transmission over Transpacific Distance at 6.0 b/s/Hz Spectral Efficiency , 2014, Journal of Lightwave Technology.

[22]  A. Carena,et al.  On the ultimate potential of symbol-rate optimization for increasing system maximum reach , 2015, 2015 European Conference on Optical Communication (ECOC).

[23]  S. Radic,et al.  Overcoming Kerr-induced capacity limit in optical fiber transmission , 2015, Science.

[24]  Sethumadhavan Chandrasekhar,et al.  Experimental study of the limits of digital nonlinearity compensation in DWDM systems , 2015, OFC.

[25]  Ronen Dar,et al.  Inter-Channel Nonlinear Interference Noise in WDM Systems: Modeling and Mitigation , 2015, Journal of Lightwave Technology.

[26]  Meir Feder,et al.  Correlations and phase noise in NLIN-modelling and system implications , 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).