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Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser

Hagelschuer, Till and Wienold, Martin and Richter, Heiko and Lutz, Schrottke and Biermann, Klaus and Grahn, Holger T. and Hübers, Heinz-Wilhelm (2016) Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser. Applied Physics Letters. American Institute of Physics (AIP). DOI: 10.1063/1.4967435 ISSN 0003-6951

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Official URL: http://scitation.aip.org/content/aip/journal/apl/109/19/10.1063/1.4967435


We demonstrate the feasibility of high-resolution terahertz gas spectroscopy based on the external optical feedback effect in a quantum-cascade laser. Tuning the frequency of the quantum-cascade laser across a molecular absorption line of CH3OH leads to a reduction of the optical feedback, which can be detected by monitoring the voltage across the quantum-cascade laser. This method provides a high spectral resolution and a sensitivity comparable to that obtained with a cryogenically cooled Ge:Ga photoconductive detector.

Item URL in elib:https://elib.dlr.de/110197/
Document Type:Article
Additional Information:Veröffentlichung im Rahmen der Helmholtz Research School on Security Technologies (HRSST)
Title:Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hagelschuer, Tilltill.hagelschuer (at) dlr.deUNSPECIFIED
Wienold, Martinmartin.wienold (at) dlr.deUNSPECIFIED
Richter, Heikoheiko.richter (at) dlr.deUNSPECIFIED
Lutz, Schrottkelutz (at) pdi-berlin.deUNSPECIFIED
Biermann, Klausbiermann (at) pdi-berlin.deUNSPECIFIED
Grahn, Holger T.htgrahn (at) pdi-berlin.deUNSPECIFIED
Hübers, Heinz-Wilhelmheinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:7 November 2016
Journal or Publication Title:Applied Physics Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1063/1.4967435
Publisher:American Institute of Physics (AIP)
Keywords:Quantum Cascade Laser, Spectroscopy, Terahertz
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Fernerkundung für sicherheitsrelevante Anwendungen
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems
Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Hagelschuer, Till
Deposited On:05 Jan 2017 16:19
Last Modified:08 Mar 2018 18:53

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