Highly Sensitive, Calibration-Free WM-DAS Method for Recovering Absorbance-Part II: Experimental Analysis.
absorbance
calibration-free
fast-Fourier transform
gas temperature and concentration
spectroscopic parameters
tunable diode laser absorption spectroscopy
Journal
Sensors (Basel, Switzerland)
ISSN: 1424-8220
Titre abrégé: Sensors (Basel)
Pays: Switzerland
ID NLM: 101204366
Informations de publication
Date de publication:
22 Jan 2020
22 Jan 2020
Historique:
received:
30
11
2019
revised:
15
01
2020
accepted:
18
01
2020
entrez:
26
1
2020
pubmed:
26
1
2020
medline:
26
1
2020
Statut:
epublish
Résumé
Following the theoretical work in Part I, in this experimental study, the robustness, temporal resolution, and the narrow scan performance of the proposed wavelength modulation-direct absorption spectroscopy (WM-DAS) method are experimentally validated in a high-temperature tube furnace. The electromagnetic and other random-frequency noises can be effectively eliminated by extracting the characteristic spectra of the light intensity. The performance of WM-DAS with modulation frequencies from 0.1 to 100 kHz and scan indexes from 3.3 to 11.1 are also investigated at atmospheric pressure. The proposed method produces accurate line profile and high SNR over 500 consistently even with a weak absorption. As for real applications, the spectral line parameters of CO at 4300.6999 cm
Identifiants
pubmed: 31979159
pii: s20030616
doi: 10.3390/s20030616
pmc: PMC7038228
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : National Natural Science Foundation of China
ID : 51676105, 51906120, 11972213
Organisme : China Postdoctoral Science Foundation
ID : 2018M640125, 2019T120088
Organisme : National Key Research and Development Plan of China
ID : 2016YFC0201104
Déclaration de conflit d'intérêts
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
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