Open AccessTransmission method of improved fiber nonlinearity tolerance for probabilistic amplitude shaping
Author(s) -
Wen-Chih Peng,
An Liu,
Qing Guo,
Yan Cui,
Yusheng Bai
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.400549
Subject(s) - quadrature amplitude modulation , optics , amplitude , waveform , nonlinear system , transmission (telecommunications) , physics , qam , pairing , modulation (music) , amplitude modulation , single mode optical fiber , probabilistic logic , optical fiber , telecommunications , computer science , bit error rate , frequency modulation , bandwidth (computing) , acoustics , channel (broadcasting) , radar , superconductivity , quantum mechanics , artificial intelligence
For probabilistic amplitude shaping (PAS), we propose a super-symbol transmission method that improves fiber nonlinearity tolerance. A simple fiber nonlinearity low-pass filtering model, as well as its interaction with the spectral dip of signal's intensity waveform, is provided to explain the origin of this nonlinear benefit. With 25-GHz-spaced, 26 × 22.5 GBaud dual-polarized PAS-64 quadrature amplitude modulation (QAM) signals transmitted over 12 spans of 80-km standard single mode fiber (SSMF), the proposed method is found to provide ∼0.15-dB gain over the previous finite-blocklength method with intra-DM pairing, ∼0.26-dB gain over finite-blocklength method with inter-DM pairing, and ∼0.44-dB benefit over the traditional method, all with a feasible blocklength at 200.