Open AccessA simulation process of tunable open path diode laser spectrometer to detect a carbon monoxide gas in NIR region
Author(s) -
Ruaa Kahtan Mahmood,
Samira Adnan Mehdi
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/961/1/012081
Subject(s) - spectrometer , laser , carbon monoxide , wavelength , detection limit , diode , materials science , infrared , limit (mathematics) , matlab , tunable laser , optics , optical path , optoelectronics , chemistry , physics , computer science , biochemistry , mathematics , chromatography , operating system , catalysis , mathematical analysis
By modifying the wavelength of the open path tunable diode laser spectrometer (TDLS) in the near infrared region, theoretical research was implemented to improve the detection limit of carbon monoxide gas. To adjust the correct wavelength in the NIR area, MatLab code was created. Following that, frequency domain measurements were performed in order to extract the second harmonic as an indicator of gas presence. According to the results, the correct wave length in the NIR area is (1584.877 nm), and the lowest limit of CO gas concentration is (0.012 ppb).