Multicarrier Digital Backpropagation for 400G Optical Superchannels

Optical superchannels and digital nonlinear mitigation are key technology options to be considered for the deployment of next-generation optical 400G transmission systems. In this paper, we experimentally assess the performance and complexity of multicarrier digital backpropagation (DBP) for dual- a...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 34; no. 8; pp. 1896 - 1907
Main Authors Guiomar, Fernando Pedro, Batalha Amado, Sofia, Ferreira, Ricardo M., Dias Reis, Jacklyn, Rossi, Sandro M., Chiuchiarelli, Andrea, Rodrigues Fernandes de Oliveira, Juliano, Teixeira, Antonio L., Nolasco Pinto, Armando
Format Journal Article
LanguageEnglish
Published New York IEEE 15.04.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
400G
Complexity theory
coupled equations
DSP
Mathematical model
Modulation
nonlinear compensatio
Nonlinear optics
Optical communication systems
Optical polarization
Optical receivers
superchannels
Wavelength division multiplexing
WDM
DSP
WDM
nonlinear compensation
optical communication systems
Coupled equations
superchannels
400G
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Summary:Optical superchannels and digital nonlinear mitigation are key technology options to be considered for the deployment of next-generation optical 400G transmission systems. In this paper, we experimentally assess the performance and complexity of multicarrier digital backpropagation (DBP) for dual- and triple-carrier 400G superchannels based on polarization-multiplexed (PM) 16QAM and 64QAM modulation. As an alternative to the widely used nonlinear compensation based on total-field DBP, we demonstrate that a coupled-equations DBP (CE-DBP) approach can be more computationally efficient and also more robust to a nonideal equalization of the receiver front-end in scenarios with limited sampling rate and electrical bandwidth. Employing a triple-carrier PM-16QAM superchannel placed in a 75-GHz slot of a WDM system, we demonstrate an ultralong-haul signal reach of 6600 km using CE-DBP, corresponding to 32% increase relatively to chromatic dispersion equalization (CDE). Targeting an highly spectral-efficient solution for 400G transmission in metro optical networks, these results are extended to a triple-carrier PM-64QAM superchannel placed in a 50-GHz slot, yielding a maximum signal reach of 1750 km through the use of CE-DBP in single-superchannel propagation, corresponding to approximately 60% increase over CDE.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2015.2512661