| 全光网节点规模的分析 |
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| 引用本文： | 郑小平,李艳和,张汉一,郭奕理.全光网节点规模的分析[J].中国激光,2001,28(9):851-853. |
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| 作者姓名： | 郑小平 李艳和 张汉一 郭奕理 |
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| 作者单位： | 清华大学电子工程系 |
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| 基金项目： | 国家重大自然科学基金 (编号 :69990 5 4 0 )，863，国家教委基金资助项目 |
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| 摘 要： | 导出了光信噪比与光节点数量 ,掺铒光纤放大器 (EDFA)噪声系数 ,增益的关系公式 ,并分析了光节点数目与EDFA特性参数的关系。分析表明 ,当光节点中EDFAs设置成输入EDFA补偿节点损耗 ,输出EDFA补偿光纤损耗的工作方式时 ,要保持光信号的信噪比不低于 2 0dB ,则光节点数目最多为 19左右 ,改善EDFA的噪声系数对提高光节点数目的作用不大 ;如降低光节点内部损耗 ,优化两个EDFA的增益 ,可以最大程度地提高网络节点规模 ,网络节点数最大可达 5 6。
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| 关 键 词： | 全光网 光节点 掺铒光纤放大器 |
| 收稿时间： | 2000/6/5 |
Analysis of the Size of All Optical Network |
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| ZHENG Xiao-ping,LI Yan-he,ZHANG Han-yi,GUO Yi-li.Analysis of the Size of All Optical Network[J].Chinese Journal of Lasers,2001,28(9):851-853. |
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| Authors: | ZHENG Xiao-ping LI Yan-he ZHANG Han-yi GUO Yi-li |
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| Abstract: | The dependence of optical signal-noise ratio on the number of optical nodes, both noise figure and gain of EDFAs is derived. The relation between the number of optical nodes and specifications of EDFAs is analyzed. Followings are concluded: 1) The number of optical nodes is about 19 under the case where the first EDFAs of optical nodes are used for the loss of nodes and the second EDFAs for the loss of fiber, and where the OSNR is required more than 20 dB; 2) To modify EDFAs′noise figure increases the number a litter; 3) It can increase the size of the all optical network up to 56 by reducing the loss of the nodes and optimizing each gain of EDFAs as well. |
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| Keywords: | all optical network optical node EDFA |
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