The paper focuses on the following work : ( 1 ) analyzes fiber sensing theory of intensity modulation ; deduces modulation formula of reflex sensor and studies its characteristics using computer ; experiments the sensing characteristics of reflex types and fiber bundles 其中的强度调制型光纤传感技术最具有实用化性,本论文将研究其调制特性并进行强度调制型光纤真空度传感实验,主要的研究工作包括: 1分析了强度调制型光纤传感原理。