基于直接调制分布式反馈（DFB）激光器的25公里单模光纤强度调制直接检测（IMDD）系统中光正交频分复用（OFDM）符号同步的实时实验演示。

Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based 25km SMF IMDD systems.

作者信息

Jin X Q, Giddings R P, Hugues-Salas E, 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. 2010 Sep 27;18(20):21100-10. doi: 10.1364/OE.18.021100.

DOI:10.1364/OE.18.021100

PMID:20941006

Abstract

A simple optical OFDM (OOFDM) synchronization technique utilizing subtraction and Gaussian windowing at the symbol rate is proposed and implemented in FPGA-based OOFDM receivers. End-to-end real-time symbol synchronization of 128-QAM-encoded OOFDM signals at raw bit rates of 6.56Gb/s is experimentally demonstrated, for the first time, over directly modulated DFB laser-based 25km SMF intensity modulation and direct detection (IMDD) systems. Experimental investigations show that the proposed synchronisation technique offers a number of salient advantages including low complexity, fast tracking speed, high accuracy and suitability for high-capacity optical transmission systems.

摘要

提出了一种简单的光学正交频分复用（OOFDM）同步技术，该技术在符号速率下利用减法和高斯加窗，并在基于现场可编程门阵列（FPGA）的OOFDM接收机中实现。首次通过基于直接调制分布反馈（DFB）激光器的25km单模光纤（SMF）强度调制和直接检测（IMDD）系统，以实验方式证明了128正交幅度调制（QAM）编码的OOFDM信号在6.56Gb/s原始比特率下的端到端实时符号同步。实验研究表明，所提出的同步技术具有许多显著优点，包括低复杂度、快速跟踪速度、高精度以及适用于高容量光传输系统。