基于时间交织相位分集检测的相干光接入系统  

Coherent Optical Access System Based on Time Interleaved Phase-Diversity Detection

作　　者：贝劲松[1] 尹凡 钟一鸣 杨波[1] 黄新刚[1] 马壮[1] 李正璇 Bei Jinsong;Yin Fan;Zhong Yiming;Yang Bo;Huang Xingang;Ma Zhuang;Li Zhengxuan(ZTE Corporation,Shenzhen,Guangdong 518057,China;Key Laboratory of Specialty Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]中兴通讯股份有限公司,广东深圳518057 [2]上海大学特种光纤与光接入网重点实验室,上海200444

出　　处：《光学学报》2021年第23期47-52,共6页Acta Optica Sinica

基　　金：上海市科委项目(20511102400,20ZR1420900);111计划(D20031);中兴通讯研究基金。

摘　　要：为了实现信号同相分量和正交分量的交替检测,提出了一种基于预设频率偏移的相干探测方案。该方案所需的硬件数量与外差检测一致,均为零差检测的一半。相关实验与仿真结果表明,相比外差检测方案,本方案不需要后续的下变频过程,对接收机的带宽需求较低。为了解决该方案中色散、激光器频率偏移以及接收机带宽受限造成的信号失真问题,提出了一种自适应实值均衡结构,为相干检测在成本敏感接入网中的应用提供了一种低成本、低复杂度的解决方案。In order to realize the alternate detection of the in-phase and quadrature components of the signal,a coherent detection scheme based on a preset frequency offset is proposed in this paper.The hardware quantity required by this scheme is the same as that of heterodyne detection,which is half of that of homodyne detection.Relevant experiments and simulation results show that,compared with the heterodyne detection scheme.This scheme does not require a subsequent down-conversion process and has a lower bandwidth requirement for the receiver.In order to solve the signal distortion caused by dispersion,laser frequency offset and receiver bandwidth limitation in this scheme,an adaptive real-value equalization structure is proposed.It provides a low-cost and low-complexity solution for the application of coherent detection in cost-sensitive access networks.

关 键 词：光通信 相干探测 低成本相干 接收机带宽 频率偏移 

分 类 号：TN929.11[电子电信—通信与信息系统]