Open AccessChromatic dispersion mitigation using a SEFDM-based diversity technique for IM/DD long reach optical links
Author(s) -
Baoxian Yu,
Changjian Guo,
Sen Zhang,
Tao Zuo,
Lei Liu,
Alan Pak Tao Lau,
Chao Lu,
Han Zhang
Publication year - 2019
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.381267
Subject(s) - orthogonal frequency division multiplexing , computer science , spectral efficiency , diversity scheme , fading , telecommunications , electronic engineering , modulation (music) , bandwidth (computing) , qam , quadrature amplitude modulation , bit error rate , physics , decoding methods , channel (broadcasting) , acoustics , engineering
Spectral efficient frequency division multiplexing (SEFDM) can offer a higher spectral efficiency (SE) than orthogonal frequency division multiplexing (OFDM). In this work, we propose a diversity technique based on SEFDM for beyond 100-Gb/s optical intensity modulation and direct detection (IM/DD) long reach (LR) applications. We mathematically demonstrate that the self-created inter-carrier interference of SEFDM signals can be reused to achieve a diversity gain on each sub-carrier and, in turn, improve the tolerance to power fading induced by chromatic dispersion (CD) in IM/DD LR links. Based on the proposed diversity technique, we further demonstrated a 112-Gb/s SEFDM transmission over 80-km standard single-mode fiber, using only 28-GHz bandwidth and modulation format of up to 16-QAM. Experimental results show that SEFDM with the proposed diversity technique performs robust against CD effects and outperforms the conventional OFDM with adaptive bit and power loading of the same bandwidth and data rate, which validates the superiority of the proposed SEFDM in optical IM/DD LR transmissions.