| WDM网中同频串扰的研究 |
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| 引用本文： | 程振杰,余重秀. WDM网中同频串扰的研究[J]. 光子学报, 2001, 30(1): 21-26 |
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| 作者姓名： | 程振杰 余重秀 |
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| 作者单位： | 北京邮电大学电子工程系，北京 100876 |
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| 摘 要： | 串扰是波分复用(WDM)光网络中限制光交叉连接(OXC)节点容量的一个重要因素.本文分析了相干和非相干串扰对通过OXC节点的光信号的影响,给出了固定和最佳判决门限两种情况下的光功率恶化,并进行了仿真计算.结果表明相干串扰对系统的影响很大.与固定判决相比,采用最佳判决可以降低串扰影响.串扰引起的光功率恶化主要取决于复用波数M,而与输入光纤数N关系不大.为了减小串扰对网络的限制,可以在OXC节点内使用滤波器.
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| 关 键 词： | 波分复用 光交叉连接 相干串扰 非相干串扰 固定判决门限(FDT) 最佳判决门限(ODT) |
| 收稿时间： | 1999-12-21 |
| 修稿时间： | 1999-12-21 |
INTRABAND CROSSTALK IN WDM NETWORKS |
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| Cheng Zhenjie,Yu Chongxiu Beijing University of Posts , Telecommunications. INTRABAND CROSSTALK IN WDM NETWORKS[J]. Acta Photonica Sinica, 2001, 30(1): 21-26 |
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| Authors: | Cheng Zhenjie Yu Chongxiu Beijing University of Posts & Telecommunications |
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| Abstract: | The crosstalk is an important limiting factor in optical wavelength division multiplexing (WDM) networks with optical cross connect (OXC) nodes.The impact of coherent and incoherent crosstalk on an optical signal passing through a typical OXC architecture is studied in this paper.We give the analytical power penalty expressions for both fixed decision threshold (FDT) and optimum decision threshold (ODT) cases.Through simulation calculation,the coherent crosstalk is found to be the most important limitation in the OXC.Compared with FDT,ODT will tolerate more crosstalk contributions.On the other hand,the power penalty will depends less on the number of input fiber N compared with the multiplexing wavelength number M for the ideal performance of switch.In order to relax the total crosstalk specification requirement for components,the use of DMUX/MUX filters are proposed |
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| Keywords: | Wavelength division multiplexing (WDM) Optical cross connect (OXC) Coherent crosstalk Incoherent crosstalk Fixed decision threshold (FDT) Optimum decision threshold (ODT) |
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