光纤副载波复用传输中的谐波干扰和交调干扰

北京邮电大学学报 ›› 1999, Vol. 22 ›› Issue (3): 21-25.

光纤副载波复用传输中的谐波干扰和交调干扰

杨学民, 陈树强

北京邮电大学电信工程学院, 北京 100876

收稿日期:1998-11-02 出版日期:1999-07-10

The Harmonic and Intermodulation Distortion in the Transmission of Optical Subcarrier Multiplexing

Yang Xuemin, Chen Shuqiang

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Received:1998-11-02 Online:1999-07-10

摘要/Abstract

摘要： 在副载波复用中激光器的非线性造成的信号失真来自两种不同的非线性效应, 一种是激光器固有的非线性, 另外一种是激光器P-I曲线的非线性.由于激光器P-I曲线的线性越来越好和副载波复用的副载波频率越来越高, 激光器固有的非线性造成的谐波干扰和交调干扰越来越起主要干扰作用.利用半导体激光器的粒子数方程对副载波复用中多个电载波造成的二阶谐波干扰、二阶交调干扰和三阶交调干扰的各项进行计算, 并且分析了减小干扰的方法.

关键词: 副载波复用, 交调干扰, 谐波干扰, 载噪比

Abstract: When subcarrier multiplexing (SCM) technology is applied for optical transmission, intermodulation products originate from two different nonlinear effects. There are intrinsic nonlinearities cause by the mixing ofphotons and electrons in the laser cavity. The other is the nonliearity of thelaser P-I curve. As the frequency of subcarrier become more and more high ,theeffect of harmonic and intermodulation distortion on distortion originated fromthe intrinsic nonlinearities of semiconductor laser become more and more important. Using rate equation of laser, Analysis and calculates the harmonic and intermodulation distortion,and analysis the approach of decreasing the distortion.

Key words: subcarrier multiplexing, harmonic distortion, intermodulation distortion, CNR

中图分类号:

TN914.3

杨学民, 陈树强. 光纤副载波复用传输中的谐波干扰和交调干扰[J]. 北京邮电大学学报, 1999, 22(3): 21-25.

Yang Xuemin, Chen Shuqiang. The Harmonic and Intermodulation Distortion in the Transmission of Optical Subcarrier Multiplexing[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 1999, 22(3): 21-25.