基于光学调频连续波的气体光谱检测技术研究进展  

Recent advances in spectroscopic gas sensing based on optical frequency-modulated continuous-wave techniques

作　　者：娄秀涛[1] 王玥 卢辉辉 董永康[2] LOU Xiutao;WANG Yue;LU Huihui;DONG Yongkang(School of Physics,Harbin Institute of Technology,Harbin 150001,China;National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学物理学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《量子电子学报》2021年第5期564-579,共16页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金,61775049,61575052。

摘　　要：激光吸收光谱(LAS)技术具有定量性好和操作便捷的优势,已成为目前最为广泛使用的激光光谱气体检测技术,但在许多实际应用中,传统的LAS在光程精确测定、多点气体检测和大动态范围检测等方面的指标仍不能满足需求。介绍了一种基于光学调频连续波(FMCW)技术的气体光谱检测方法,该方法将FMCW技术引入到LAS中,在充分利用FMCW精确定位能力的同时,挖掘光学FMCW信号中的吸收光谱信息。详细介绍了光学FMCW气体光谱检测技术的基本原理,总结了本课题组采用该技术在多通池内气体吸收光谱和光程同步测量、多点式气体检测和大动态范围气体检测三个方面的最新研究进展,并对下一步研究工作做了展望。Laser absorption spectroscopy(LAS)has the advantages of accurate quantification and straightforward operation.It has become the most widely used laser spectroscopic gas sensing technology.However,in many practical applications,traditional LAS cannot meet the requirements in highprecision optical path length measurement,multi-point gas sensing and large-dynamic-range detection.A spectroscopic gas detection method based on the frequency-modulated continuous-wave(FMCW)technique is introduced.In the method,FMCW is introduced into the LAS,and the absorption spectral information in optical FMCW signal is extracted while making full use of the high-precision positioning capability of FMCW.The basic principle of optical FMCW gas spectrum detection technology is introduced in detail firstly,then the latest research progress in synchronous measurement of gas absorption spectrum and optical pathlength,multi-point gas detection and large-dynamic-range gas detection is reviewed,and the future research work is prospected.

关 键 词：光谱学 吸收光谱 气体检测 调频连续波 多点式 大动态范围 

分 类 号：O433.4[机械工程—光学工程]