用LED作光源的Fabry-Perot光纤甲烷气体传感器的研究  

Study on Fabry-Perot CH_4 Optical Fiber Sensor with LED

作　　者：王玉田[1] 郭增军[1] 王莉田[1] 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004

出　　处：《计量学报》2002年第4期307-310,共4页Acta Metrologica Sinica

基　　金：河北省自然科学基金 (60 0 2 2 7)

摘　　要：利用Fabry Perot腔的选频特性 ,考虑与光纤的低损耗窗口相一致和价格等因素 ,采用价廉的1 3μm波段的LED作为光源 ,实现了PZT对Fabry Perot腔的正弦调制。对甲烷气体浓度进行谐波检测 ,检测灵敏度可达 10× 10 - 6 。With selection function of Fabry Perot cavity, in accordance with low loss window and price factor of optical fiber, a new approach of using cheap 1 3 μm LED to realize sinusoidal modulation of Fabry Perot cavity by PZT and implement harmonic detection of CH 4 concentration is described. Our experiment has shown that the detection sensitivity is 10 ppm. Compared with traditional detection methods, the detection sensitivity and reliability of CH 4 gas concentration by using this method have been greatly improved.

关 键 词：LED 光源 甲烷 Fabry-Perot光纤气体传感器 谐波检测 气体浓度 安全检测 

分 类 号：X924.3[环境科学与工程—安全科学] TP212.2[自动化与计算机技术—检测技术与自动化装置]