We employ a novel spectroscopic setup based on an external cavity quantum cascade laser and a Mach–Zehnder interferometer to simultaneously record spectra of absorption and dispersion of liquid samples in the mid-infrared. We describe the theory underlying the interferometric measurement and discuss its implications for the experiment. The capability of simultaneously recording a refractive index and absorption spectrum is demonstrated for a sample of acetone in cyclohexane. The recording of absorption spectra is experimentally investigated in more detail to illustrate the method’s capabilities as compared to direct absorption spectroscopy. We find that absorption signals are recorded with strongly suppressed background, but with smaller absolute sensitivity. A possibility of optimizing the setup’s performance by unbalancing the interferometer is presented.
en
dc.description.sponsorship
Competence Centers for Excellent Technologies (COMET)
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dc.language
English
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dc.language.iso
en
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dc.publisher
SPRINGER HEIDELBERG
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dc.relation.ispartof
Applied Physics B : Lasers and Optics
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.title
A quantum cascade laser-based Mach–Zehnder interferometer for chemical sensing employing molecular absorption and dispersion
en
dc.type
Article
en
dc.type
Artikel
de
dc.rights.license
Creative Commons Namensnennung 4.0 International
de
dc.rights.license
Creative Commons Attribution 4.0 International
en
dc.contributor.affiliation
Fraunhofer Institute for Applied Solid State Physics IAF, Germany
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dc.contributor.affiliation
Fraunhofer Institute for Applied Solid State Physics IAF, Germany
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dc.description.startpage
1
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dc.description.endpage
9
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dc.rights.holder
The Author(s) 2018
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dc.type.category
Original Research Article
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tuw.container.volume
124
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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tuw.version
vor
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dcterms.isPartOf.title
Applied Physics B : Lasers and Optics
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tuw.publication.orgunit
E164 - Institut für Chemische Technologien und Analytik
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tuw.publisher.doi
10.1007/s00340-018-6899-8
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dc.identifier.articleid
28
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dc.identifier.eissn
1432-0649
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dc.identifier.libraryid
AC15321020
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dc.description.numberOfPages
9
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dc.identifier.urn
urn:nbn:at:at-ubtuw:3-5042
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dc.rights.identifier
CC BY 4.0
de
dc.rights.identifier
CC BY 4.0
en
item.openaccessfulltext
Open Access
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item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
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item.grantfulltext
open
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item.languageiso639-1
en
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item.openairetype
research article
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item.fulltext
with Fulltext
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item.cerifentitytype
Publications
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
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crisitem.author.dept
Fraunhofer Institute for Applied Solid State Physics IAF, Germany
-
crisitem.author.dept
Fraunhofer Institute for Applied Solid State Physics IAF, Germany
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crisitem.author.dept
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.orcid
0000-0003-3838-5842
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crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.parentorg
E164 - Institut für Chemische Technologien und Analytik