@inproceedings{a04848ed30814e638b61ecc2b1a204e2,
title = "Experimental demonstration of WDM-PON based on probabilistic shaped PAM4 modulation format",
abstract = "We propose and experimentally demonstrate a 5 × 50-Gb/s wavelength-division-multiplexing passive optical network (WDM-PON) based on probabilistic shaping (PS) 4-level pulse amplitude modulation (PAM4) with direct detection. Each optical carrier at the optical line terminal (OLT) carries a 25-Gbaud PS-PAM4 signal according to the near-Gaussian distribution. The spectral efficiency (SE) of the system can be enhanced under the same average power and received power sensitivity (RPS) by employing PS-PAM4 at the optical network units (ONU). A blind feedback pre-equalization (BFP) based on the joint constant modulus algorithm (CMA) and decision-directed least-mean-squares (DD-LMS) is proposed to accurately compensate the signal high frequency loss of the electro-optical components such as DAC, optical modulators and electrical drivers at the OLT. The experimental results show that the proposed WDM-PON over 20 km single mode fiber (SMF) transmission are with 1.44 dB superior receiver sensitivity by employing PS-PAM4 and additional 0.78 dB device linear impairment effect improvement by BFP.",
keywords = "PAM4, WDM-PON, blind feedback pre-equalization, loss budget, probabilistic shaping",
author = "Qinghua Xiao and Hailian He and Xinxing Wu and Jialin You and Youxu Zeng and Ze Dong",
note = "Publisher Copyright: {\textcopyright} 2019 SPIE.; 17th International Conference on Optical Communications and Networks, ICOCN 2018 ; Conference date: 16-11-2018 Through 19-11-2018",
year = "2019",
doi = "10.1117/12.2522176",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Zhaohui Li",
booktitle = "17th International Conference on Optical Communications and Networks, ICOCN 2018",
address = "United States",
}