大气与环境光学学报2024，Vol.19Issue(4)：456-467,12.DOI:10.3969/j.issn.1673-6141.2024.04.006
中红外波段差分吸收检测气体池设计与实验
Design and experiment of gas cell for mid-infrared differential absorption detection
摘要
Abstract
To address the problem of the detection performance calibration of differential absorption lidar in mid-infrared band,a straight-through gas cell for differential absorption detection in mid-infrared band was designed and constructed to carry out experiments on differential absorption spectroscopy detection of atmospheric benzene.The structural and optical parameters of the gas cell were designed by using a mid-infrared interband cascade laser as the light source and combining the emission beam parameters of the interband cascade laser.Then the transmittance characteristics and sealing performance of the gas cell were tested at 3187.0 nm and 3235.3 nm wavelengths.Finally,differential absorption lidar detection calibration experiments were carried out using benzene as an example.The results showed that the light transmission rate of the gas cell in the test band was greater than 85%,the negative air pressure was reduced by about 13 kPa after 100 h,and the correlation coefficient of the differential absorption spectroscopy detection calibration experiment was 0.995,indicating that the designed gas cell fully meets the calibration requirements of the mid infrared differential absorption lidar.关键词
光谱检测/差分吸收技术/直通型气体池/中红外波段/苯浓度Key words
optical spectral detection/differential absorption technique/straight-through type gas cell/mid-infrared wavelength band/benzene concentration分类
数理科学引用本文复制引用
王怡,李仕春,刘若彤,刘家辉,辛文辉..中红外波段差分吸收检测气体池设计与实验[J].大气与环境光学学报,2024,19(4):456-467,12.基金项目
国家自然科学基金(62175199,61875162),陕西省自然科学基金(2020JM-445),陕西省教育厅自然科学基金(20JY048),陕西省大学生创新创业训练计划项目(S202210700104) （62175199,61875162）
