计及判决门限与非理想消光比的串扰分析  

The Effect of Extinction Ratio in the Analysis of Crosstalk

作　　者：戴无惧[1] 张汉一[1] 何永琪 

机构地区：[1]清华大学电子工程系,北京100084 [2]大唐电信,北京100081

出　　处：《光子学报》2003年第5期529-533,共5页Acta Photonica Sinica

基　　金：国家自然科学基金资助项目 (项目编号 :69990 5 40)

摘　　要：推导出了在多重串扰情况下 ,串扰光和系统光噪声共同存在时 ,接收机输入光信号及其基带输出信号的表达式 计算了在最优判决门限和平均判决门限两种情况下 ,背景误码率在 10 - 9条件时 ,信号光消光比与串扰光消光比对系统误码率的影响 结果表明 ,对于不同的接收机判决门限 ,信号光的消光比在 10～ 12dB的范围内 。The expression formula for the total input electrical-field of optical receiver in DWDM systems in the case of existence of optical noise and crosstalk is deduced. The effect of optical extinction-ratio of signal and the receiver threshold on the system BER performance is calculated for the case of averaged threshold and optimal threshold, as the background BER for the case of 10 -9 due to ASE-signal beat noise and optical decision-level are assumed. It is found that optimal extinction-ratio is about 8～12 dB, while taking into account of various facts.

关 键 词：判决门限 非理想消光比 多重串扰 光噪声 误码率 WDM光传送网 波分复用 信号光 串扰光 

分 类 号：TN915.02[电子电信—通信与信息系统] TN915.63[电子电信—信息与通信工程]