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应用科学学报 ›› 2022, Vol. 40 ›› Issue (5): 749-757.doi: 10.3969/j.issn.0255-8297.2022.05.004

• 通信工程 • 上一篇    下一篇

基于WDM-PON架构的5G前传系统中的FWM效应

于培华1,2, 李正璇1,2, 许岩1,2, 宋英雄1,2   

  1. 1. 上海大学 通信与信息工程学院, 上海 200444;
    2. 上海大学 特种光纤与光接入网重点实验室, 上海 200444
  • 收稿日期:2021-05-12 出版日期:2022-09-30 发布日期:2022-09-30
  • 通信作者: 李正璇,博士,副研究员,研究方向为宽带接入技术。E-mail:zhengxuanli@shu.edu.cn E-mail:zhengxuanli@shu.edu.cn
  • 基金资助:
    上海市科委基金（No.20511102400，No.20ZR1420900）；高等学校学科创新引智计划（111计划）（No.D20031）资助

FWM Effect in 5G Fronthaul Transmission System Based on WDM-PON Architecture

YU Peihua1,2, LI Zhengxuan1,2, XU Yan1,2, SONG Yingxiong1,2   

  1. 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China;
    2. Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China
  • Received:2021-05-12 Online:2022-09-30 Published:2022-09-30

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摘要： 为了应对快速增长的带宽需求，解决非线性效应限制波分复用无源光网络（wavelength-division multiplexing passive optical network，WDM-PON）系统的传输距离和信道容量，尤其是四波混频（four-wave mixing，FWM）效应的问题。通过实验与仿真研究了25 Gb · s-1 · λ-1非归零码（non-return-to-zero，NRZ）信号经过25 km标准单模光纤（standard single-mode fiber，SSMF）传输时，FWM效应对系统所产生的影响。仿真结果表明，在信道间隔为200 GHz的12个波长传输系统中，除了第一个和最后一个信道之外，其他信道误码率（bit error rate，BER）都不能达到前向纠错码（forward error correction，FEC）的门限1.0 × 10-3。因此，在制定5G前传系统波长分布和信道间隔时，应充分考虑FWM串扰。

关键词: 5G前传, 波分复用无源光网络, 非线性效应, 四波混频

Abstract: Wavelength-division multiplexing passive optical network (WDM-PON) is considered as a mainstream solution for 5G fronthaul transmission system to cope with the rapidly increasing demand of bandwidth. However, nonlinearity effects, especially the fourwave mixing (FWM) effect in WDM-PON systems will impair system performances in the transmission distance and channel capacity. In this paper, the influence of FWM effect on multi-wavelength system with 25 Gb·s-1 ·λ-1 non-return-to-zero (NRZ) signal over 25 km standard single-mode fiber (SSMF) transmission is explored by experiment and simulation. Study results show that in a 200 GHz spaced 12-channel system, the bit error rate (BER) of all channels, except for the first and last channels, cannot reach the threshold 1.0× 10-3 of forward error correction (FEC). This implies that FWM crosstalk should be given full consideration while making wavelength plans for 5G fronthaul system, including the wavelength distribution and channel spacing selection.

Key words: 5G fronthaul, wavelength-division multiplexing passive optical network (WDMPON), nonlinear effects, four-wave mixing

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