基于新型自相干技术与高阶调制的无源光接入网络研究  

Design and Demonstration of a Novel Self-coherent PON Scheme Based on High-order Modulation

作　　者：王燕瑾[1] 邵宇丰[1] 迟楠[1] 

机构地区：[1]复旦大学泛媒通信实验室,上海200433

出　　处：《复旦学报（自然科学版）》2013年第3期380-385,共6页Journal of Fudan University：Natural Science

基　　金：国家"973"重点基础研究发展计划(2010CB328300);国家自然科学基金资助项目(61107064);国家"863"高技术研究发展计划(2009AA01Z253;2007AA01Z260);曙光学者基金资助项目

摘　　要：目前基于相干探测的无源光网络已成为光接入网方面的前沿课题,基于有效降低用户端光网络单元成本预算与结构复杂度的考虑,现提出了一种基于高阶调制的新型自相干无源光接网络方案.该方案将系统所需激光器均集中到光线路终端进行统一调度与控制,在用户端无需再放置任何造价高昂的光源,仅通过带通滤波即可生成上行信号光载波及相干探测下行信号所需的本振光信号.仿真结果显示,对下行10Gb/s 16QAM信号进行自相干接收,经30km标准单模光纤传输后相干探测恢复信号的误差矢量幅度仍低于10%.Recently, to enhance the receiver performance, there have been increasing interests in utilizing coherent technology in passive optical network（PON）. However, the cost and complexity of the optical network unit （ONU） are big problems. So a novel self-coherent PON using 16QAM modulation is proposed and demonstrated by simulation. To control the cost of ONU, all lasers needed are centralized to the optical line terminal in this scheme. Meanwhile, the optical carrier for uplink signal and local oscillator signal for coherent reception of downlink signal is generated through band-pass filter at the ONU. The simulation result proves that 10 Gb/s 16QAM downlink signals can be successfully transmitted over 30 km SMF at the EVM〈10%.

关 键 词：无源光网络 相干光通信 频偏估计 载波恢复 误差矢量幅度 

分 类 号：TN929.11[电子电信—通信与信息系统]