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应用科学学报 >

2020 , Vol. 38 >Issue 4: 612 - 629

DOI: https://doi.org/10.3969/j.issn.0255-8297.2020.04.007

光纤通信技术

下一代光接入网中物理层关键技术研究进展

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  • 1. 上海大学 特种光纤与光接入网重点实验室, 上海 200444;
    2. 上海大学 特种光纤与先进通信国际合作联合实验室, 上海 200444

收稿日期: 2020-05-23

  网络出版日期: 2020-08-01

基金资助

国家自然科学基金国际合作重点项目（No.61420106011）；上海市科委重点项目基金（No.17010500400，No.18511103400）；高等学校学科创新引智计划基金（No.D20031）资助

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Progress in Key Technologies of Physical Layer in Next Generation Optical Access Networks

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  • 1. Key laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China;
    2. Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China

Received date: 2020-05-23

  Online published: 2020-08-01

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摘要

5G和数据密集型应用的兴起对下一代光接入网的容量提出了新的挑战.作为最成熟的宽带光纤接入技术，无源光网络（passive optical network，PON）受到了广泛关注.为了在满足功率预算的前提下实现更高的传输速率，提升物理层性能的关键技术一直是该领域的研究热点，同时尽可能地降低系统成本对PON的大规模部署有着重大意义.该文梳理并总结了光接入网中物理层关键技术的研究进展.介绍了PON标准的演进和现状，分析了下一代PON面临的挑战和成因，重点阐述了数字均衡技术、高阶调制格式、光放大、前向纠错、非线性串扰实验分析以及低成本相干检测等关键技术及其研究进展，并综述了当前相关工作的研究成果.

关键词： 无源光网络; 均衡技术; 调制格式; 光放大; 前向纠错; 非线性串扰; 低成本相干检测

本文引用格式

骆思雨, 许岩, 李正璇, 宋英雄, 汪敏 . 下一代光接入网中物理层关键技术研究进展[J]. 应用科学学报, 2020 , 38(4) : 612 -629 . DOI: 10.3969/j.issn.0255-8297.2020.04.007

Abstract

The rapid growth of 5G and data-intensive applications poses new challenges to the capacity of next-generation optical access networks. As the most mature broadband fiber access technology, passive optical networks (PON) has drawn widespread attention. In order to achieve a higher transmission rate under the premise of meeting the power budget, the key technology to improve the performance of the physical layer has always been a research hotspot in this field. Meanwhile, it is of great significance to reduce the system cost as much as possible for the large-scale deployment of PON. In this paper, we describe and summarize the research progress of key physical layer technologies in optical access network. We introduce the evolution and current status of the PON standards, analyze the challenges and causes in the next-generation PON, and focus on the key technologies such as digital equalization technology, high-order modulation formats, optical amplification, forward error correction, experimental analysis of nonlinear crosstalk, and low-cost coherent detection and their research progress. We also review the current research achievements of relevant works.

Key words： passive optical networks; equalization technique; modulation format; optical amplification; forward error correction; nonlinear crosstalk; low-cost coherent detection

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