Frequency-Domain Volterra-Based Equalization Structures for Efficient Mitigation of Intrachannel Kerr Nonlinearities

Toward reduced-complexity digital implementation, frequency domain Volterra-based nonlinear equalization (VNLE) structures for multistep fiber nonlinearity compensation are proposed. In the cascade structures, nonlinear equalization is performed before (cascade-1) or after (cascade-2) the dispersion...

Full description

Saved in:
Bibliographic Details
Published inJournal of lightwave technology Vol. 34; no. 8; pp. 1770 - 1777
Main Authors Bakhshali, Ali, Wai-Yip Chan, Cartledge, John C., O'Sullivan, Maurice, Laperle, Charles, Borowiec, Andrzej, Roberts, Kim
Format Journal Article
LanguageEnglish
Published New York IEEE 15.04.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Computational complexity
Digital signal processing
Discrete Fourier transforms
Dispersion
Fourier transforms
Frequency-domain analysis
Kernel
nonlinear equalization
Nonlinear optics
optical fiber communications
Volterra analysis
Volterra analysis
nonlinear equalization
optical fiber communications
Digital signal processing
Online AccessGet full text

Cover

More Information
Summary:Toward reduced-complexity digital implementation, frequency domain Volterra-based nonlinear equalization (VNLE) structures for multistep fiber nonlinearity compensation are proposed. In the cascade structures, nonlinear equalization is performed before (cascade-1) or after (cascade-2) the dispersion compensation in each step. Superior performance with the shorter discrete Fourier transform (DFT) lengths and fewer equalization steps compared to the conventional VNLE with parallel structure is demonstrated in a transmission experiment. The experimental results are obtained for 256 Gb/s single-carrier dual-polarization 16-ary quadrature-amplitude-modulation with root-raised-cosine pulse shaping and a roll-off factor of 0.1. The new cascade structures demonstrate superior robustness to insufficient DFT lengths and/or a limited complexity budget. Compared to the conventional parallel arrangement of linear and nonlinear compensation filters, the cascade-1 structure provides more than 90% complexity reduction without any notable performance penalty. The structure enables the extension of the transmission reach by 1570 km, a 48% increase compared to the linear solution that uses only electronic dispersion compensation.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2015.2510607