On the next generation bandwidth variable transponders for future flexible optical systems

Elastic optical networks represent one of the most promising candidates for the imminent upgrade of current fixed-grid based optical systems. This novel architecture based on high efficient spectrum allocation (i.e. higher capacity), is necessary to cope with foreseen future exponential increase of Internet traffic. This work discusses the influence of hardware components on the transmission performance of recently proposed bandwidth variable transponders employing digital signal processing algorithms. Both are key elements for the realization of future elastic optical networks, and only their successful interplay with coherent detection can enable the transmission of different modulation formats at variable symbol and data-rates over flexible links. We evaluate the performance of such transponders when different modulation schemes are generated employing ideal and realistic values for some key hardware components. Finally, we briefly present a couple of examples of mitigation techniques: namely digital pre-distortion and digital back-propagation.

[1]  Robert Elschner,et al.  Bandwidth-Variable Transceivers Based on 4D Modulation Formats for Future Flexible Networks , 2013 .

[2]  Piero Castoldi,et al.  Elastic optical networks: The vision of the ICT project IDEALIST , 2013, 2013 Future Network & Mobile Summit.

[3]  Christoph Meinel,et al.  Digital Communication , 2014, X.media.publishing.

[4]  Maxim Kuschnerov,et al.  Performance dependence of single-carrier digital back-propagation on fiber types and data rates , 2014, OFC 2014.

[5]  Maxim Kuschnerov,et al.  Data-Aided Versus Blind Single-Carrier Coherent Receivers , 2010, IEEE Photonics Journal.

[6]  Dimitra Simeonidou,et al.  Architecture on demand for transparent optical networks , 2011, 2011 13th International Conference on Transparent Optical Networks.

[7]  Chris Matrakidis,et al.  A Novel Architecture for Highly Virtualised Software-Defined Optical Clouds , 2013 .

[8]  S. Savory.  Digital Coherent Optical Receivers: Algorithms and Subsystems , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[9]  D Bornevanden,et al.  The capacity crunch challenge: how to design the next generation of ultra-high capacity transmission systems , 2010 .

[10]  Maxim Kuschnerov,et al.  Reduced Complexity Digital Back-Propagation Methods for Optical Communication Systems , 2014, Journal of Lightwave Technology.

[11]  Maxim Kuschnerov,et al.  Adaptive digital back-propagation for optical communication systems , 2014, OFC 2014.

[12]  S.J. Savory,et al.  Compensation of Quadrature Imbalance in an Optical QPSK Coherent Receiver , 2008, IEEE Photonics Technology Letters.

[13]  Antonio Napoli,et al.  Performance comparison of different 8QAM constellations for the use in flexible optical networks , 2014, OFC 2014.

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

[15]  P. Poggiolini,et al.  Analytical Modeling of Nonlinear Propagation in Uncompensated Optical Transmission Links , 2011, IEEE Photonics Technology Letters.

[16]  Philippe Ciblat,et al.  Accurate digital frequency offset estimator for coherent PolMux QAM transmission systems , 2009, 2009 35th European Conference on Optical Communication.

[17]  F. Hauske,et al.  DSP for Coherent Single-Carrier Receivers , 2009, Journal of Lightwave Technology.

[18]  Xiang Zhou,et al.  An Improved Feed-Forward Carrier Recovery Algorithm for Coherent Receivers With $M$ -QAM Modulation Format , 2010, IEEE Photonics Technology Letters.