基于高灵敏激光吸收光谱技术的稳定气态同位素测量及其应用(特邀)  

Stable Gaseous Isotope Measurement Method Based on Highly Sensitive Laser Absorption Spectroscopy and Its Applications(Invited)

作　　者：张志荣[1,2,3,4] 夏滑 孙鹏帅[1] 余润磬[1,3] 杨曦 林雨晴 吴边 庞涛[1] 郭强[1] 李哲 刘旭 蔡永军 SIGRIST Markus W CALSHAW Brain 徐启铭 ZHANG Zhirong;XIA Hua;SUN Pengshuai;YU Runqing;YANG Xi;LIN Yuqing;WU Bian;PANG Tao;GUO Qiang;LI Zhe;LIU Xu;CAI Yongjun;SIGRIST Markus W;CALSHAW Brain;SHU Chimin(Anhui Provincial Key Laboratory of Photonic Devices and Materials,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;School of Environment Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,China;Advanced Laser Technology Laboratory of Anhui Province,National University of Defense Technology,Hefei 230026,China;College of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China;School of Electronic and Electrical Engineering,Bengbu University,Bengbu 233030,China;PipeChina General Academy of Science&Technology,Langfang 065000,China;Institute for Quantum Electronics,ETH Zurich,Zurich CH-8093,Switzerland;Department of Electrical and Electronics Engineering,University of Strathclyde,Glasgow G11XW,United Kingdom;Graduate School of Engineering Science and Technology,Yunlin University of Science and Technology,Yunlin 64002,China)

机构地区：[1]中国科学院合肥物质科学研究院安徽光机所光子器件与材料安徽省重点实验室,合肥230031 [2]中国科学院合肥物质科学研究院安徽光机所中国科学院环境光学与技术重点实验室,合肥230031 [3]中国科学技术大学环境科学与光电技术学院,合肥230026 [4]国防科技大学先进激光技术安徽省实验室,合肥230026 [5]合肥师范学院物理与材料工程学院,合肥230601 [6]蚌埠学院电子与电气工程学院,蚌埠233030 [7]国家管网集团科学技术研究总院分公司,廊坊065000 [8]苏黎世联邦理工大学,量子电子学研究所,瑞士苏黎世CH-8093 [9]思克莱德大学,电气与电子工程系,英国格拉斯哥G11XW [10]台湾云林科技大学环境与安全卫生工程系,云林64002

出　　处：《光子学报》2023年第3期119-135,共17页Acta Photonica Sinica

基　　金：国家重点研发计划(Nos.2022YFB3207601,2021YFB3201904);国家自然科学基金(Nos.11874364,41877311,42005107);安徽省重点研究与开发计划(No.202104i07020009);中国科学院合肥研究院“火花”基金(No.YZJJ2022QN02)。

摘　　要：稳定同位素测量技术已经在地球化学、地球物理、农业、生物、临床医学和生态科学等领域得到了众多应用。相对于传统的稳定同位素分析方法,基于激光吸收光谱技术的同位素分析技术,作为一种较新的同位素丰度测量方法,具有选择性好、精度高、体积小、无需样品预处理、可以实时原位同时测量气体浓度及同位素丰度等众多优点,得到了极大的关注和使用。本文主要以目前同位素测量的可调谐半导体激光吸收光谱技术、积分腔吸收光谱技术、腔衰荡吸收光谱技术三种激光吸收光谱方法为例,阐述了其基本原理、谱线选择、温压影响因素及其控制、系统组成结构以及部分应用测试结果。通过对测量系统的压力与温度的稳定控制的前提下,选取了合适的同位素测量谱线对,实现了大气CO_(2)气体的13C测量精度为0.3‰,煤层气CH4气体的13CH4测量精度为1.25‰,冰川水H_(2)O中18O、17O和2H的测量精度分别为0.3‰、0.2‰和0.5‰,以及呼吸气体中的13CO_(2)判识“金标准”。通过分析验证了激光吸收光谱技术在同位素测量方面的可行性和可靠性,也充分说明了基于激光吸收光谱技术的测量方法具有非常好的技术优势,将是光谱研究领域关注的重点内容,并在后续的科学研究中占据举足轻重的作用。Stable isotope technology has been widely used in geochemistry,geophysics,agriculture,biology,clinical medicine and ecological environment science.It is very important for the study of atmosphere,soil,water quality and health to realize the accurate measurement of gas isotope abundance.At present,isotope abundance is measured and analyzed mostly by Isotope Ratio Mass Spectrometers.It is a relatively large,expensive and complex pre-processing,which is not conducive to real-time measurement of isotope abundance in the field.With the development of laser technology,the output wavelength can cover more and more wide bands,and the performance is more better.Many kinds of gases can be detected by laser absorption spectroscopy,and the detection sensitivity is further improved.This makes it possible to measure isotopic gases,which have attracted more and more attention and become one of the hot spots of laser spectroscopy.Compared with the traditional stable isotope analysis instruments,the isotope analysis technology based on laser absorption spectroscopy,as a relatively new isotope abundance measurement method,has the advantages of high selectivity,high accuracy,small volume,real-time online monitoring concentration and abundance,etc.So,the gas isotope analysis system based on laser absorption spectroscopy technology has important application value in environmental monitoring,ecosystem research,pollution tracing and tracing because of its miniaturization,fast response and real-time online measurement.Taking Tunable Diode Laser Absorption Spectroscopy(TDLAS),Integrated Cavity Absorption Spectroscopy(ICOS)and Cavity Ring-Down Absorption spectroscopy(CRDS)as examples,the basic principle,spectrum line selection,system structure and some test results are described in this paper.Under the control of the PID system of temperature and pressure,the temperature control error is 0.003℃,and the pressure control error is 0.03mbar,which can meet the requirements of temperature and pressure control during the measurement of isotope

关 键 词：气态同位素 可调谐半导体激光吸收光谱技术 积分腔吸收光谱技术 腔衰荡吸收光谱技术 

分 类 号：O433.1[机械工程—光学工程]