Graphical characterization of infrared absorption spectroscopic gas sensor using symmetrized dot pattern

Ye, Weilin; Xu, Xiaohuan; Xia, Zikun; Luo, Wenxuan; Liu, Weihao; Wu, Fupei; Li, Shengping; Martínek, Radek; Zheng, Chuantao; Simeone, Alessandro

doi:10.1016/j.infrared.2022.104152

Cited by 4 publications

(2 citation statements)

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“…Faraday modulation spectroscopy (FAMOS) and wavelength modulation spectroscopy (WMS) are two optical‐based physical methods which is effective for O 2 detection. The characteristics and applications of WMS has been introduced by many researchers 11–13 . FAMOS, develop from magnetic rotation spectroscopy (MRS), is relies on the Faraday effect of paramagnetic molecular transitions.…”

Section: Introductionmentioning

confidence: 99%

“…The characteristics and applications of WMS has been introduced by many researchers. [11][12][13] FAMOS, develop from magnetic rotation spectroscopy (MRS), is relies on the Faraday effect of paramagnetic molecular transitions. As MRS is only sensitive to paramagnetic molecules, interferences from abundant atmospheric species such as water or carbon dioxide can be effectively avoided.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen detection based on Faraday modulation spectroscopy and wavelength modulation spectroscopy: A comparison

Chang

et al. 2022

Micro & Optical Tech Letters

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An oxygen sensor system was developed based on Faraday modulation spectroscopy (FAMOS). In the system, a distributed feedback laser near 760.9 nm was used as the light source and a 30-cm long gas cell was employed for gas absorption. The first harmonic was extracted by a commercial lock in amplifier for the derivation of concentration. Oxygen measurement experiments were conducted the performance of the sensor system was obtained. In addition, oxygen sensor system with wavelength modulation spectroscopy (WMS) scheme was developed with the same light source and gas cell for a direct comparison. Based on Allan deviation analysis, a detection limit of 0.186% for the WMS scheme and a detection limit of 0.108% for the FAMOS scheme were acquired at an averaging time of 1 s. The precisions can be further improved to 0.032% and 0.03% at an averaging time of 15 s, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%