差分吸收式光纤气体传感器的研究  

Study on difference absorptive optical fiber gas sensor

作　　者：张爱军[1] 冉昌艳[1] 张宇[1] 

机构地区：[1]武汉理工大学光纤传感技术与信息处理教育部重点实验室,湖北武汉430070

出　　处：《传感器技术》2005年第10期8-9,12,共3页Journal of Transducer Technology

基　　金：湖北省重大攻关项目(2001AA101A02)

摘　　要：研究和讨论了一种易于实现的光谱吸收型光纤气体传感器。采用分布反馈式半导体激光器作为光源,通过光源调制实现气体体积分数的谐波检测,显著提高了检测的灵敏度。同时,采用差分结构,消除了激光器光强波动等共模噪声的影响。An easy-realizable gas sensing system using absorption type optical fiber is studied and discussed. Using DFB LD as light source, the detection sensitivity has been greatly improved by light source modulation harmonic measurement. By using difference construction, it can overcome the influence of common mode interfering signals caused by the wave of LD＇s light intension.

关 键 词：光纤气体传感器 谐波检测 差分光吸收 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]