<div class="csl-bib-body">
<div class="csl-entry">Pinto, D., Waclawek, J. P., Lindner, S., Moser, H., Ricchiuti, G., & Lendl, B. (2023). Wavelength modulated diode probe laser for an interferometric cavity-assisted photothermal spectroscopy gas sensor. <i>Sensors and Actuators B: Chemical</i>, <i>377</i>, Article 133061. https://doi.org/10.1016/j.snb.2022.133061</div>
</div>
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dc.identifier.issn
0925-4005
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/142015
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dc.description.abstract
We report on key developments made in advancing Interferometric Cavity-Assisted Photothermal Spectroscopy (ICAPS) toward a method for rugged and cost-effective gas sensing. In ICAPS, a Fabry Perot Interferometer (FPI) is employed to transduce absorption induced and analyte specific refractive index changes occurring inside the interferometer. Periodic analyte excitation is achieved by modulation of the excitation laser’s wavelength and the photothermal signal is detected by measuring the intensity of the probe laser reflected by the FPI. Maximum sensitivity is achieved when the probe’s wavelength matches the inflection point of the FPI’s transfer function. We describe the development of a locking scheme based on current induced wavelength modulation of a cost-effective diode probe laser to keep its wavelengths at the inflection point of the FPI. Because of the diode lasers characteristics, this locking procedure causes changes in the emitted laser power, which in turn influences the sensor’s sensitivity. Therefore, a normalization procedure had to be developed to correct for this inherent probe power dependency of the ICAPS sensor’s sensitivity. First, a theoretical analysis of the photothermal signal generation is given. Then a strategy is presented for stable operation of the ICAPS sensor with constant sensitivity while actively locking the probe’s wavelength. Experimental results on the example of NO detection in N2 employing a quantum cascade laser (30 mW) emitting at 1900 cm⁻¹ (LOD 2 ppm, NNEA of 3.3⋅10⁻⁶ W cm⁻¹Hz-1⁄2) corroborate the validity of the developed theoretical model and demonstrate its applicability to achieve constant sensor sensitivity at different sensor set-points.
en
dc.language.iso
en
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dc.publisher
ELSEVIER SCIENCE SA
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dc.relation.ispartof
Sensors and Actuators B: Chemical
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dc.subject
photothermal spectroscopy
en
dc.subject
Fabry-Perot
en
dc.subject
interferometry
en
dc.subject
ICAPS
en
dc.subject
nitric oxide
en
dc.subject
Optical Sensing
en
dc.title
Wavelength modulated diode probe laser for an interferometric cavity-assisted photothermal spectroscopy gas sensor
en
dc.type
Article
en
dc.type
Artikel
de
dcterms.dateSubmitted
2022-08-25
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dc.type.category
Original Research Article
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tuw.container.volume
377
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tuw.journal.peerreviewed
true
-
tuw.peerreviewed
true
-
tuw.researchTopic.id
Q1
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tuw.researchTopic.name
Photonics
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tuw.researchTopic.value
100
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dcterms.isPartOf.title
Sensors and Actuators B: Chemical
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tuw.publication.orgunit
E164-02-1 - Forschungsgruppe Prozessanalytik
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tuw.publisher.doi
10.1016/j.snb.2022.133061
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dc.date.onlinefirst
2022-11-25
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dc.identifier.articleid
133061
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dc.identifier.eissn
0925-4005
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dc.description.numberOfPages
10
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tuw.author.orcid
0000-0003-3838-5842
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wb.sci
true
-
wb.sciencebranch
Chemie
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1040
-
wb.sciencebranch.oefos
1030
-
wb.sciencebranch.value
50
-
wb.sciencebranch.value
50
-
item.openairetype
Article
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item.openairetype
Artikel
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item.grantfulltext
none
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item.cerifentitytype
Publications
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item.cerifentitytype
Publications
-
item.languageiso639-1
en
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.fulltext
no Fulltext
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.orcid
0000-0003-3838-5842
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164 - Institut für Chemische Technologien und Analytik