Characterization and Monitoring of Laser Linewidths in Coherent Systems

被引：30

作者：

Chen, Xi ^{[1
]}

Al Amin, Abdullah ^{[1
]}

Shieh, William ^{[1
]}

机构：

[1] Univ Melbourne, Dept Elect & Elect Engn, Melbourne, Vic 3010, Australia

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2011年 / 29卷 / 17期

关键词：

Coherent optical OFDM; laser linewidth; phase noise; OPTICAL OFDM; NOISE;

D O I：

10.1109/JLT.2011.2160153

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A closed-form expression for differential phase-error variance is derived for the phase noise averaged over a finite time window. Using this expression, a method of laser linewidth characterization and in-service monitoring is proposed in presence of additive white noise applicable to both single-carrier and multi-carrier systems. The method is further substantiated by experiments of 107-Gb/s coherent optical OFDM transmission over 960-km SSMF fiber. Additionally, a novel technique of digitally tuning laser linewidth is proposed and demonstrated which may be useful to systematically study the laser phase noise impact.

引用

页码：2533 / 2537

页数：5

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