本論文初步的建置相位靈敏光時域分析儀，可以作爲分佈式光纖震動感測之應用，對於系統歸納出重要參數，瞭解後續優化的基本方向，透過文獻瞭解雷利散射如何讓發生與時域系統的建立，再經過參數的選取延長感測距離，也對後端的資料處理進行了開發，論文針對模擬震動源和實際震動都做了相關的測試。首先説明了光纖感測的優點，介紹了光於光纖中傳輸產生不同散射其應用的基本架構，介紹了相位靈敏光時域分析儀系統，并詳述此系統如何應用於待測區。
在論文的中段對於當前的感測系統作初步的介紹，包括各元件以及儀器在此實驗中的功能，同時也對參數做分析，散射光經過光偵測器輸出到數位熒光示波器上，使用Labview從示波器上取出數值，透過Matlab針對模擬震動和真實震動，對數據作移動平均差分或直接差分的訊號處理方式確定震動點，結果通過畫圖和文字的方式直接顯示明顯的震動點位置。最後使用模擬震動源量測1.7km和3.2km的光纖長度，對於真實環境，將4.6km長度光纖中10m光纖懸空，通過後端訊號處理可以準確的確定震動源的位置。

In this thesis, a phase-sensitive optical time-domain analyzer is initially built, which can be used as the application of distributed optical fiber vibration sensing. The important parameters of the system are summarized, and the basic direction of subsequent optimization is determined. This proposed system used several parameters to extend the sensing distance and then developed the back-end data processing. Firstly, the advantages of optical fiber sensing are explained, and the basic architecture of applying light transmission in optical fibers to produce different scattering was introduced.
In the middle of the thesis, a preliminary introduction to the current sensing system was made, including the functions of each component and the instrument used in this experiment, and the parameters are also analyzed. The light scattered output goes to the digital phosphor oscilloscope through the light detector, then by using Labview to analyze the value from the oscilloscope, and use Matlab to process the data by moving average difference or direct difference signal processing for simulated vibration and real vibration to determine the vibration position. The result is to directly display the obvious vibration position by graph and text code. Finally, use the simulated vibration source to measure the length of the 1.7km and 3.2km optical fibers. For the real environment, the 10m optical fiber is put off in the 4.6km long optical fiber, and the vibration source position can be determined accurately through back-end signal processing.

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