首次对集成信道估计和可变功率加载的6Gb/s实时光正交频分复用收发器进行实验演示。

First experimental demonstration of 6Gb/s real-time optical OFDM transceivers incorporating channel estimation and variable power loading.

作者信息

Giddings R P, Jin X Q, Tang J M

机构信息

School of Electronic Engineering, Bangor University, Dean Street, Bangor LL57 1UT, UK.

出版信息

Opt Express. 2009 Oct 26;17(22):19727-38. doi: 10.1364/OE.17.019727.

DOI:10.1364/OE.17.019727

PMID:19997193

Abstract

The fastest ever 6Gb/s real-time FPGA-based optical orthogonal frequency division multiplexing (OOFDM) transceivers utilizing channel estimation are experimentally demonstrated, for the first time, with variable power loading being incorporated to effectively compensate for the rapid system frequency response roll-off effect. The implemented transceivers are constructed entirely from off-the-shelf components and incorporate crucial functionalities of on-line performance monitoring and live optimization of key parameters including signal clipping, subcarrier power and operating conditions of directly modulated DFB lasers (DMLs). Real-time end-to-end transmission of a 6Gb/s 16-QAM-encoded OOFDM signal over 300m OM1 multi-mode fiber with a power penalty of 0.5dB is successfully achieved in an intensity-modulation and direct-detection system employing a DML.

摘要

首次通过实验证明了有史以来最快的基于6Gb/s实时现场可编程门阵列（FPGA）的光正交频分复用（OOFDM）收发器，该收发器利用信道估计，并结合可变功率加载来有效补偿快速的系统频率响应滚降效应。所实现的收发器完全由现成组件构建，并具备在线性能监测以及对包括信号削波、子载波功率和直接调制分布反馈激光器（DML）工作条件在内的关键参数进行实时优化等关键功能。在采用DML的强度调制和直接检测系统中，成功实现了6Gb/s 16正交幅度调制（16-QAM）编码的OOFDM信号在300m OM1多模光纤上的实时端到端传输，功率代价为0.5dB。