dc.contributor.author
Herklotz, Frank
dc.contributor.author
Rubin, Tom
dc.contributor.author
Sinnreich, Malte
dc.contributor.author
Helmke, Alexander
dc.contributor.author
von Haimberger, Theodore
dc.contributor.author
Heyne, Karsten
dc.date.accessioned
2022-08-04T10:54:55Z
dc.date.available
2022-08-04T10:54:55Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/35721
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-35436
dc.description.abstract
A quantum cascade laser-based sensing technique is presented which allows for in situ high-precision temperature and/or CO2 concentration measurements of gases in the room temperature regime with sampling rates up to about 40 kHz. The method is based on Boltzmann-like thermally populated fundamental and hot-band rovibrational transitions of CO2 with opposite temperature dependence. Single absorption spectra at about 2350 to 2352 cm−1 are recorded by a nanosecond frequency down chirped IR pulse of a pulsed distributed feedback quantum cascade laser (intrapulse mode). The statistical uncertainty (1σ) in the temperature measurement within one laser pulse is about 1 K and can be further reduced down to about 0.1 K by time averaging over 100 ms. Online temperature and CO2 concentration measurements on a breath simulator controlled gas flow were performed to demonstrate response-time and sensitivity for an application-driven test system.
en
dc.format.extent
9 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
optical sensing
en
dc.subject
quantum cascade laser
en
dc.subject
laser absorptions spectroscopy
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Fast Simultaneous CO2 Gas Temperature and Concentration Measurements by Quantum Cascade Laser Absorption Spectroscopy
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
5057
dcterms.bibliographicCitation.doi
10.3390/app12105057
dcterms.bibliographicCitation.journaltitle
Applied Sciences
dcterms.bibliographicCitation.number
10
dcterms.bibliographicCitation.originalpublishername
MDPI
dcterms.bibliographicCitation.volume
12
dcterms.bibliographicCitation.url
https://doi.org/10.3390/app12105057
refubium.affiliation
Physik
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
de
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2076-3417