Adaptive Dual-Harmonic Switching WMS for CO2 Measurement Over a Wide Dynamic Range

A dual-harmonic switching wavelength modulation spectroscopy (DHS-WMS) technique has been proposed for gas sensing. The optimal signal-to-noise ratio (SNR) is achieved by adaptively switching harmonic signals based on gas concentrations. To implement the DHS-WMS technique, a gas sensing system with...

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Veröffentlicht in:	IEEE sensors journal 2025-01, Vol.25 (1), p.253-259
Hauptverfasser:	Li, Zifei, Hu, Yunfan, Wang, Xianyi, Tu, Guojie, Yu, Benli, Zhou, Sheng
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Air monitoring Air quality Carbon dioxide Carbon dioxide (CO2) Demodulation dual-harmonic switching wavelength modulation spectroscopy (DHS-WMS) gas concentration Gas lasers Gas sensors Greenhouse gases Harmonic analysis harmonic detection Harmonics Measurement by laser beam Modulation Optical switches Power harmonic filters Signal to noise ratio Spectrum analysis Wavelength measurement Wavelength modulation
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