本論文主要介紹一新式的基於麥克森干涉儀之入侵感測系統。本系統使用分波多工的方式製成多個串聯的「防區」，每防區約為50公尺。透過及時偵測不同防區之干涉訊號改變，方可得知哪一防區遭受入侵，若有多個防區同時遭受入侵也能同時偵測，也沒有防區間干擾情形。本實驗共架設四個防區，經過程式觀察入侵產生之訊號強度，即可設定適當的閾值，使之僅針對真實的入侵訊號發布警報。

This paper aims at introducing a new style of intrusion detection system which is based on fiber Michelson interferometer. In this system, by using the technique of wavelength division multiplexing, multiple “defensed-zone” are connected in series. The length of each defensed-zone is about 50m. By detecting the intrusion-induced interference signal changing in each defensed-zone, one can identify which zone is intruded. This system also supports the detection of simultaneously multiple intrusion occurring at several defensed-zones, and the signal from each defensed-zone will not affect each other. In this paper, a four defensed-zone system is built, with each zone having a part of fiber cable attached on a netted fence for the purpose of testing the performance of the intrusion detection system.

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