传感技术学报2017，Vol.30Issue(1)：162-166,5.DOI:10.3969/j.issn.1004-1699.2017.01.029
一种基于温控半导体激光波长扫描的光纤瓦斯测量系统∗
Optical Fiber Methane Sensing Systems Employing Wavelength￣Scanning Based Temperature Control Techniques
摘要
Abstract
Fiber￣optic coal methane gas sensing measurement systems, which employ wavelength￣scanning based temperature control technologies,are designed and investigated for some experiments. By changing operating tempera￣ture of DFB laser with the center wavelength of 1 653 nm to scan its output wavelength,there are some absorption peaks of methane gas among the wavelength scanning ranges of 5 nm. After the DFB laser light is injected into the measured gas chamber, the optical output signals carrying gas concentration information, which are converted into electrical signals by photoelectric detector and data acquisition,are used to calculate the gas concentration by compa￣ring the absorption peak position to no absorption peak position of the optical power. Owing to the use of 80 mA constant current source for driving DFB semiconductor laser,this sensing system is with the advantages of stable output light intensity,simple structure and high sensitivity.关键词
光纤传感/波长扫描/瓦斯测量/DFB激光器Key words
Fiber optic sensing/wavelength scanning/methane sensing/DFB laser分类
信息技术与安全科学引用本文复制引用
肖尚辉,荆耀秋,汤俊..一种基于温控半导体激光波长扫描的光纤瓦斯测量系统∗[J].传感技术学报,2017,30(1):162-166,5.基金项目
省科技支撑计划项目(2011GZ0254)；博士基金项目(2016RC005) （2011GZ0254）
