English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49613/84835 (58%)
造訪人次 : 7687567      線上人數 : 94
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/102679

    題名: 基於法布里-珀羅雷射二極體的光通道故障監測系統之研究
    其他題名: Study of optical channel fault monitoring systems based on Fabry-Perot laser diodes
    作者: 周子揚;Chou, Tzu-Young
    貢獻者: 淡江大學電機工程學系碩士班
    楊淳良;Yang, Chun-Liang
    關鍵詞: 故障監控;法布里-珀羅雷射二極體;無源光網絡(PON);光網絡單元(ONU);Fault Monitoring;Fabry-Perot Laser Diode;Passive Optical Network(PON);Optical Network Unit(ONU)
    日期: 2014
    上傳時間: 2015-05-04 10:01:43 (UTC+8)
    摘要: 無源光網絡(PON)成為當今接取網路的首要架構。由於被動光網路架構僅在光線路終端(OLT)及用戶端光網絡單元(ONU)使用到主動元件,在兩端中間的傳輸線路中完全使用被動式光元件。因此,他們不僅提供高品質和寬帶服務,同時也避免了對維護和網絡建設的許多問題。
    然而,也正因為上述PON的特性,被動式光纖分支的架構或是局端傳輸設備的好與壞,皆會影響著此網路系統的傳輸效能。因此對於電信業者而言,如何有效的即時監控PON以及同時具備保護裝置乃為實現PON系統的重要考量。同理,對於WDM-PON系統進行大容量的數據到多個用戶,信號通道故障監測確保系統的可靠性至關重要。可調光時域反射儀(OTDR)可用於檢測光纖線路之斷裂。放大自發輻射(ASE)源或其它多波長光源也可以在WDM-PON的通道故障監測系統中提供監控信號。通常在ONU端加入各種元件如光纖光柵(Fiber Bragg Grating, FBG)或者鏡面(Mirror)以改變其反射量,以便於監測其反射信號。
    Passive optical networks (PONs) nowadays become significant architectures of access networks. As a low-cost and wideband network scheme, PONs are composed of passive components in the networks, but only optical line terminal (OLT) and optical network unit(ONU) are active apparatuses. So they not only provide a service with high quality and wideband, but also avoid many problems on the maintenance and construction in the networks.

    However, these characteristics of PONs also make defect. It is easy to affect the performance of the network transmission system by the branching structure on fiber or the quality of central office transmission equipment. For operators, to achieve PON systems, it is important to monitor in real-time and to have a protective scheme. Similarly, for a wavelength-division-multiplexed PON (WDM-PON) system carrying high-capacity data to many users, channel fault monitoring is essential for ensuring the system reliability.Tunable optical time-domain reflectometers can be used to detect fiber breaks in both the feeder and distribution fibers. An amplified spontaneous emission source or other multi-wavelength light sources can also be used to provide the monitoring signal for channel fault monitoring in a WDM-PON system. In addition, a fiber Bragg grating or a mirror can be designed in the ONU to carry out the channel fault monitoring.

    In this thesis, the proposed optical monitoring unit based on a single low-cost coaxial-type FP-LD as a dithered reflector and a photo-receiver has been demonstrated in a simple WDM-PON architecture. It is very suitable for monitoring the status of fiber paths and ONUs.
    顯示於類別:[電機工程學系暨研究所] 學位論文


    檔案 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋