Sensitive Detection of CO2 Molecule Using Near Infrared Diode Laser Absorption Spectroscopy

[in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]

Journals >Acta Optica Sinica >Volume 23 >Issue 5 >Page 609 > Article

Acta Optica Sinica
Vol. 23, Issue 5, 609 (2003)

Sensitive Detection of CO₂ Molecule Using Near Infrared Diode Laser Absorption Spectroscopy

[in Chinese]^*, [in Chinese], [in Chinese], [in Chinese], and [in Chinese]

Author Affiliations

[in Chinese]

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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Sensitive Detection of CO₂ Molecule Using Near Infrared Diode Laser Absorption Spectroscopy[J]. Acta Optica Sinica, 2003, 23(5): 609 Copy Citation Text

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Abstract

The initial observation of CO 2 absorption at 1.57 μm near-infrared tunable diode laser wavelength modulation spectroscopy (WMS) combined with second harmonic detection reported. A minimum detectable absorption of 8.6×10 -5 (signal-noise-ratio is 2) was achieved, it corresponds to 500×10 -6 detection sensitivity.

Keywords

high sensitivity detection second harmonic wavelength modulation spectroscopy