摘要
在10G无源光网络(PON)商用之后,下一代PON的成本和向前兼容性是影响后续发展的重要因素。为了尽量利用运营商在现有光分配网络(ODN)上的投资以及与原来的PON共存,着重讨论基于时分复用(TDM)的单波长25G PON方案的物理层技术以及成本控制相关的技术要点。对于50G PON的技术演进,则简要介绍了调制方案的特点和新引入的数字信号处理(DSP)技术。最后对25G和50G PON在行业内的现状和发展做了归纳和展望。
The cost and backward compatibility are the key factors for next passive optical network(PON)evolution after commercial 10G PON readiness.To leverage the investment from operator for current optical distribution network(ODN)deployment and support co-existed PON system,this article focuses on the technical solution at physical layer for 25G PON with relevant cost control based on time division multiplexing(TDM)mode related with single wavelength.To support 50G PON evolution,it briefly introduces the characteristics of modulation scheme and the newly introduced digital signal processing(DSP)technology.Finally,it summarizes the latest industrial situation and gives the forecast evolution of 25G and 50G PON.
作者
成刚
CHENG Gang(Nokia Shanghai Bell Co.Ltd.,Shanghai 200127,China)
出处
《光通信技术》
北大核心
2020年第1期35-38,共4页
Optical Communication Technology
关键词
无源光网络
脉冲幅度调制
NRZ调制
数字信号处理
时分复用
passive optical network
4-pulse amplitude modulation
non-return-zero modulation
digital signal processing
time division multiplexing
