本論文以麥克森干涉儀為感測基礎，設計一光纖式感測儀，可應用於邊界防禦系統，其中透過DWDM將不同防區的雷射分為多個特定波長，分別可以對應於數個防區系統，以利於增加防禦系統範圍，另外在此架構中，並不需要先行架構好龐大的多波長雷射系統再進入感測端，而是可以將分波長動作在個別防區架構中完成，本文中，我們先選擇了四個波長製作四個防區，其中三個波長相近，而另外一個波長相對於其於三個波長較遠，分別測試其在室內以及戶外的表現，另外除了單一防區感測表現外，也測試了其他防區對某防區的影響；配合電腦軟體界面，隨時監控各個防區是否有遭到入侵跡象，並且於室內以及戶外不同環境下分別決定判斷門檻值(Threshold)，再以不同入侵方式測試各防區之干涉效果以及是否會互相干擾，以達到最低誤報率之效果。

In this paper, we propose a perimeter intrusion detection system which uses Michelson interferometers. This system has four defense zone and each zone employs a specified wavelength to detect intrusion. The goal of this paper is trying to find the thresholds at different weathers and situations. We preset three thresholds to decide whether the disturbance is intrusion or not. When the disturbance occurs and the detected signal meets the conditions for intrusion, the proposed algorithm triggers an alarm. In other words, if we want to reduce false alarm rate effectively, we just need to preset the right thresholds at first.

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