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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46707
標題: | 光纖網路監測技術之研究 The Research on Monitoring Technologies for Optical Networks |
作者: | Kuo-Chin Jong 鐘國晉 |
指導教授: | 曹恆偉 |
共同指導教授: | 李三良 |
關鍵字: | 性能監測,非同步取樣,相平面,干涉元件,蒙地卡羅法, Performance monitoring,asynchronous sampling,phase portrait,interferometric device,Monte-Carlo method, |
出版年 : | 2010 |
學位: | 博士 |
摘要: | 在光纖骨幹網路中的光信號傳輸,因為其路徑長且傳輸速率高,容易受到光信噪比劣化與光纖色散之影響。對樹狀架構的光纖接取網路而言,由於其網路拓樸的特性,並無法使用傳統的光時域分析儀找出斷路分支。為了使光纖網路能維持好的服務品質,必須利用簡單且可靠的監測系統來確保其運作。
本論文提出光纖網路的光路監測架構,其中包含兩個部份:(1)眼圖參數監測,(2)網路斷線偵測。前者的內容包含非同步眼圖監測,其可應用在強度調變與同調光通信系統中;此外本論文也提出在被動光纖網路中,上行信號眼圖的監測方法,能夠藉此得到每個封包的眼圖參數。由於干涉式光網路斷線監測系統,可以應用在樹狀架構的光纖接取網路中。因此本論文先以理論推導為基礎,找出系統內參數間的對應關係,並以蒙地卡羅法進行模擬,並探討干涉元件之變異對監測結果造成的影響。 For the transmissions in fiber-optic backbone networks, it is susceptible to the degradation of optical signal-to-noise ratio and dispersion due to the long transmission distance and high data rate. In tree-type fiber-optic access networks, a traditional optical time-domain is unable to distinguish the fault branch because of the network topology. In order to maintain service quality in fiber-optic networks, an easily-operated and reliable monitoring system is necessary. The topic of this thesis is focus on monitoring technologies in fiber-optic networks, including (1) eye diagram monitoring and (2) fault branch detection. The former contains asynchronous eye diagram monitoring that can be adopted in amplitude-modulated and coherent optical communication systems. The burst mode eye diagram monitoring method for passive optical networks is also present in this thesis. Because the detection scheme using interferometric devices can detect the fault branch in a tree-type optical network, we derive the analytical expression related to this scheme and analyze the length tolerance of interferometric devices by using the Monte-Carlo simulation method. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46707 |
全文授權: | 有償授權 |
顯示於系所單位: | 光電工程學研究所 |
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