摘要
sensor based on light-induced thermoelastic spectroscopy(LITES)with a fiber-coupled multipass cell was demonstrated for carbon monoxide(CO)detection.The fiber-coupled structure has the merits of reducing optical interference and difficulty in optical alignment and increasing system robustness.A 1.57 nm continuous wave distributed feedback diode laser was used as the excitation source.A minimum detection limit of 9 ppm was obtained,and the calculated normalized noise equivalent absorption coefficient was 1.15×10^(-7)cm^(-1)•W•Hz^(-1/2).The reported CO-LITES sensor showed excellent linear concentration response and system stability.
作者
刘晓楠
马欲飞
Xiaonan Liu;Yufei Ma(National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin 150001,China)
基金
This work was supported by the National Natural Science Foundation of China(Nos.62022032,61875047,and 61505041)
Natural Science Foundation of Heilongjiang Province of China(No.YQ2019F006)
Fundamental Research Funds for the Central Universities
Financial Grant from the Heilongjiang Province Postdoctoral Foundation(No.LBH-Q18052).