多模光纤线路的组合二阶失真分析  

Analysis of composite second-order distortion in multimode fiber-optic links

作　　者：朱军[1] 张俊[1] 马帅[1] 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230039

出　　处：《光通信研究》2011年第1期37-39,共3页Study on Optical Communications

基　　金：国家自然科学基金资助项目(60972040);安徽省高等学校省级自然科学研究重点项目(KJ2010A020);安徽大学人才队伍建设经费资助项目(02203105)

摘　　要：在多模光纤线路上传输多路射频模拟信号会带来谐波失真和互调失真。文章通过推导多模光纤线路的谐波失真和互调失真表达式,分析了影响组合二阶失真的因素,进而得到接收功率的频谱特性。结果表明:在中短距离传输的多模光纤线路上,如果组合二阶失真的值小于-50dBc,可以采用副载波复用技术传输多路射频信号。Harmonic and intermodulation distortions may be resulted from the transmission of multi-channel RF analog signals on multimode fiber-optic links.In this paper,the factors causing composite second-order distortions are analyzed and thus the spectrum characteristic of the received power obtained on the basis of deducing the expressions of the harmonic and intermodulation distortions in multimode fiber-optic links.The results show that multi-channel RF signals can be transmitted over short or middle-range multimode fiber-optic links by using the subcarrier multiplexing technology when the composite second-order distortion value is below-50 dBc.

关 键 词：多模光纤 光信号传输 副载波复用 组合二阶失真 

分 类 号：TN818[电子电信—信息与通信工程]