DocumentCode :
1261907
Title :
Multiplier-Free Intrachannel Nonlinearity Compensating Algorithm Operating at Symbol Rate
Author :
Tao, Zhenning ; Dou, Liang ; Yan, Weizhen ; Li, Lei ; Hoshida, Takeshi ; Rasmussen, Jens C.
Author_Institution :
Fujitsu R&D Center, Beijing, China
Volume :
29
Issue :
17
fYear :
2011
Firstpage :
2570
Lastpage :
2576
Abstract :
Intrachannel nonlinearity is considered a major distortion in high-capacity transmission systems particular for the case without inline optical chromatic dispersion compensation. In this paper, a low-complexity intrachannel nonlinear compensator operating at the symbol rate is proposed based on the nonlinear perturbation predistortion for the dual-polarization quadrature phase-shift keying (DP-QPSK) systems. Compared with the widely studied backpropagation algorithm, the proposed algorithm achieves comparable performance with significantly reduced complexity and halved sampling speed in digital signal processing and digital-to-analog converters. The proposed algorithm is demonstrated in a 43 Gb/s DP-QPSK transmission experiment over 1500 km. In addition to the experimental demonstration, numerical simulation verifies that the proposed algorithm is quite robust by tolerating significant uncertainties of link parameters and span-by-span inhomogeneity in the links.
Keywords :
digital-analogue conversion; nonlinear optics; optical fibre dispersion; optical fibre networks; optical information processing; optical transmitters; quadrature phase shift keying; DP-QPSK systems; backpropagation algorithm; bit rate 43 Gbit/s; digital signal processing; digital-to-analog converters; dual-polarization quadrature phase-shift keying systems; high-capacity transmission systems; low-complexity intrachannel nonlinear compensator; multiplier-free intrachannel nonlinearity compensating algorithm; nonlinear perturbation predistortion; optical distortion; optical links; standard single-mode fiber; Fiber nonlinear optics; Modulation; Optical fibers; Optical noise; Optical polarization; Intrachannel nonlinearity; perturbation; predistortion; quadrature phase-shift keying (QPSK);
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2011.2160933
Filename :
5936088
Link To Document :
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