| 计及判决门限与非理想消光比的串扰分析 |
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| 引用本文： | 戴无惧,张汉一,何永琪.计及判决门限与非理想消光比的串扰分析[J].光子学报,2003,32(5):529-533. |
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| 作者姓名： | 戴无惧 张汉一 何永琪 |
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| 作者单位： | 1. 清华大学电子工程系,北京,100084
2. 大唐电信,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目 (项目编号 :69990 5 40) |
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| 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,系统的误码特性接近最优.
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| 关 键 词： | 串扰 消光比 判决门限 波分复用 光噪声 相干 |
| 收稿时间： | 2002/7/12 |
| 修稿时间： | 2002年7月12日 |
The Effect of Extinction Ratio in the Analysis of Crosstalk |
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| Dai Wuju ,Zhang Hanyi ,He Yongqi Dept of E&E,Tsinghua University,Beijing DTT,Beijing Received date:.The Effect of Extinction Ratio in the Analysis of Crosstalk[J].Acta Photonica Sinica,2003,32(5):529-533. |
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| Authors: | Dai Wuju Zhang Hanyi He Yongqi Dept of E&E Tsinghua University Beijing DTT Beijing Received date: |
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| Institution: | Dai Wuju 1,Zhang Hanyi 1,He Yongqi 21 Dept of E&E,Tsinghua University,Beijing 1000842 DTT,Beijing 100081Received date:20020712 |
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| Abstract: | 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. |
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| Keywords: | Crosstalk Extinction-Ratio Threshold Wavelength-Division-Multiplex Optical noise Coherent |
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