基于光腔环路衰荡光谱技术气体浓度测量的研究  

Gas concentration measurement based on fibercircled cavity ring-down method

作　　者：李文超[1,2] 沙晓鹏[3] 刘正君[3] 李志全[3] 冯蕾[4] 马伯华[1] 

机构地区：[1]秦皇岛职业技术学院,河北秦皇岛066100 [2]河北工业大学信息学院,天津300130 [3]燕山大学电气工程学院,河北秦皇岛066004 [4]中国人民解放军装备指挥技术学院,北京101416

出　　处：《应用光学》2009年第5期831-835,共5页Journal of Applied Optics

基　　金：国家自然科学基金资助项目(60877047);河北自然科学基金资助项目(F2008000873);教育部高等学校博士学科点专项科研基金资助项目(20070216004)

摘　　要：为了实现痕量气体在线测量与分析,设计了光纤环路光腔衰荡多组分气体浓度在线测量系统;基于非线性光腔衰荡技术,利用所设计的系统对气体浓度在线测量并进行了实验分析;得出了同种气体不同浓度时光的吸收程度随时间变化的规律和1 ppb的分辨率。实验表明该方法对痕量气体的在线测量是有效的。In order to realize the trace gas concentration on-line measurement and analysis, a multi-type gas concentration on-line measurement system based on fiber-circled cavity ring-down method was designed and developed. Based on the nonlinear optical cavity ring-down technology, the experimental analysis of the gas concentration in-situ measurement with such system was performed. The gas-to-light absorption characteristics of the same gas with different concentrations changed with time and their relationship was given. The resolution of concentration measurement reaches 1 ppb. The experiment proves that the system can be used to measure trace gas concentration effectively.

关 键 词：气体浓度 在线测量 衰荡特性 掺铒光纤放大器 可调光衰减器 

分 类 号：TN25[电子电信—物理电子学] O433.4[机械工程—光学工程]