摘要
由于调制光信号质量的好坏影响到传输和接收信号质量的好坏,因此对100Gbit/s系统中的数字光信号的测量与分析十分重要。文章对100Gbit/s transponder中调制光信号的生成原理进行了分析,对数字光信号测试中的OSNR(光信噪比)、EVM(误差矢量幅值)和星座图等几个参数进行了必要的理论探讨。同时也分析了各种QPSK(四相相移键控)信号星座图的图形,为使用调制器分析问题提供了有效参考。
As the quality of the modulated optical signals is associated with that of the transmitted and received signals, it is ver-y important to test and analyze them. This paper describes the generating principle of the modulated optical signals in 100 Gbit/s transponder modules and conducts the necessary theoretical exploration of such parameters as Optical Signal Noise Ratio （OSNR）, Error Vector Magnitude （EVM） and constellation map involved in digital optical signal tests. In addition, it analyzes the graphs of constellation maps of various QPSK signals, offering an effective reference for the analysis by transmit-ters.
出处
《光通信研究》
北大核心
2012年第4期1-3,32,共4页
Study on Optical Communications
基金
国家"九七三"计划资助项目(2010CB328300)
