综述了消逝场型光纤氢气传感器的原理、特点，对光纤中消逝场的分布情况作了理论分析。
The theory and characteristics of the fiber -optic evanescent -field hydrogen gas sensor are reviewed , and the distribution of fiber -optic evanescent -field is analyzed.
微透镜型光纤氢气传感器结构设计简单、灵敏度高、响应速度快，并且可以进行多次复用。
The micro-mirror fiber-optic hydrogen sensor is a kind of optical sensor with simple structure, high sensitivity, strong stability, and good reusability.
而光纤氢气传感器却能同时满足安全、实时在线检测、不干扰被测环境、不产生电火花的要求。
Optical fiber hydrogen sensor could satisfy the demand of safety, online detection, undisturbed surrounding, and no spark.
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