Open AccessLow-Complexity One-Step Digital Back-Propagation for Single Span High-Capacity Coherent Transmissions
Author(s) -
Xingyu Zhou,
Qunbi Zhuge,
Meng Qiu,
Fangyuan Zhang,
Mohammed Sowailem,
Thang M. Hoang,
Meng Xiang,
Baojian Wu,
Kun Qiu,
David V. Plant
Publication year - 2017
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2017.2702379
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
A low-complexity one-step digital back-propagation (DBP) scheme is proposed to mitigate intrachannel and interchannel fiber nonlinearities in high-capacity single span transmissions. Compared with conventional coherent receivers, the only additional calculation is a low-complexity nonlinear phase noise compensation stage operated between bulk chromatic dispersion (CD) compensation and adaptive equalizer. The required number of real additions and multiplications per sample are only (6N + 2) and (2N + 6), respectively, where N is the number of compensated wavelength-division-multiplexing (WDM) channels. With the proposed one-step DBP, we demonstrate that the nonlinear noise can be suppressed by >60% in single channel experiments and >40% in seven-channel WDM simulations.