A highly sensitive mid-infrared dual-range real-time trace sensor was developed for ethane detection in exhaled breath, in which a continuous-wave (CW) mode interband cascade laser (ICL) emitting at 3348.2 nm and a multi -pass gas cell (MPGC) with an effective optical absorption length of 76.3 m were adopted in the trace sensor. The ethane concentration in the exhaled breath was measured by scanning the ethane absorption lines at 2986.7 cm(-1) and 2988.2 cm(-1) using wavelength modulation spectroscopy (WMS) techniques of tunable diode laser absorption spectroscopy (TDLAS), which allows for highly sensitive detection in two ethane concentration ranges. The Allan deviation indicated the limit of detection (LoD) of the sensor system can be averaged up to similar to 269 ppt over the entire integration time.
基金：
National key Research and development programs [2020YFB0408402]; Fundamental Research Funds for the Central Universities [19CX02045A]; key R & D program of Shandong Province [2019GHY112084, 2019GGX104103]
第一作者机构：[1]China Univ Petr East China, Coll Control Sci & Engn, Qingdao 266580, Peoples R China
通讯作者：
推荐引用方式(GB/T 7714)：
Li Guolin,Wu Yunhui,Zhang Zecheng,et al.WMS based dual-range real-time trace sensor for ethane detection in exhaled breath[J].OPTICS AND LASERS IN ENGINEERING.2022,159:doi:10.1016/j.optlaseng.2022.107222.
APA：
Li, Guolin,Wu, Yunhui,Zhang, Zecheng,Zhang, Xuena,Ma, Kun...&Li, Qiang.(2022).WMS based dual-range real-time trace sensor for ethane detection in exhaled breath.OPTICS AND LASERS IN ENGINEERING,159,
MLA：
Li, Guolin,et al."WMS based dual-range real-time trace sensor for ethane detection in exhaled breath".OPTICS AND LASERS IN ENGINEERING 159.(2022)
