连续波激光衰荡痕量气体浓度测量系统的研究  

Research on the Trace Gas Concentration Measurement System Based on CW Laser Ring-down Method

作　　者：李志全[1] 王会波[1] 田秀仙[1] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《激光与红外》2008年第10期1037-1041,共5页Laser & Infrared

基　　金：国家自然科学基金项目(No.60377002);河北省博士基金项目(B37)资助

摘　　要：介绍了一种新型的基于连续波激光光腔循环衰荡多组分气体浓度测量系统,并对设计过程中各主要器件的原理和作用进行了分析与研究。得出了七种特定峰值波长的光分别在对应浓度为100cm3/m3的七种气体中的衰荡时间,比较了不同浓度的同种气体对光的吸收特性,研究了光的衰荡时间、环路损耗与气体对光的吸收系数和气体浓度的关系,提出了一种气体浓度在线测量的新方法。In this paper, the new CW laser gas concentration measurement system based on the cavity ring-down method was introduced, and the analysis to the principles and functions of the main devices were done during the designing progress. Then, the ring-down times of seven certain light in seven corresponding gases （with the same concentration of 100cm^3/m^3） were obtained, and the gas absorption characteristics in different concentrations were given. Also, the ring-down time-gas absorption coefficient-gas concentration relation and the loop loss-gas absorption coefficient-gas concentration relation were analyzed, all of which proposed a new method for the gas concentration in-situ measurement.

关 键 词：循环衰荡 增益可调掺铒光纤放大器 可调光衰减器 衰荡时间 吸收系数 气体浓度 

分 类 号：TN253[电子电信—物理电子学]