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Spectral Terahertz Imaging with a Quantum-Cascade Laser

Hagelschuer, Till and Rothbart, Nick and Richter, Heiko and Wienold, Martin and Hübers, Heinz-Wilhelm (2016) Spectral Terahertz Imaging with a Quantum-Cascade Laser. In: 41th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz 2016. 41th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz 2016, 25.-30. September 2016, Copenhagen, Denmark.

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Abstract

In this report we demonstrate a high-spectralresolution terahertz (THz) imaging system on the basis of a THz quantum-cascade laser (QCL), a fast scanning mirror (FSM), and a cryogenic-cooled Ge:Ga detector. During the scan through an absorption cell filled with methanol (CH3OH), spectral information is obtained through QCL frequency tuning within a range that covers the feature of interest. Our results provide information about the spatial distribution of CH3OH gas based on the transmission at the central frequency of the absorption line. The image acquisition time is on the order of a few seconds and only limited by the mechanics of the employed FSM. This allows for fast detection of a leaking THz-transparent tube that is mounted into the absorption cell.

Item URL in elib:https://elib.dlr.de/110210/
Document Type:Conference or Workshop Item (Poster)
Additional Information:Veröffentlichung im Rahmen der Helmholtz Research School on Security Technologies (HRSST)
Title:Spectral Terahertz Imaging with a Quantum-Cascade Laser
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hagelschuer, Tilltill.hagelschuer (at) dlr.deUNSPECIFIED
Rothbart, Nicknick.rothbart (at) dlr.deUNSPECIFIED
Richter, Heikoheiko.richter (at) dlr.deUNSPECIFIED
Wienold, Martinmartin.wienold (at) dlr.deUNSPECIFIED
Hübers, Heinz-Wilhelmheinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:September 2016
Journal or Publication Title:41th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Quantum Cascade Laser, Terahertz, Imaging, Spectroscopy
Event Title:41th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz 2016
Event Location:Copenhagen, Denmark
Event Type:international Conference
Event Dates:25.-30. September 2016
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
Deposited By: Hagelschuer, Till
Deposited On:05 Jan 2017 16:17
Last Modified:11 Sep 2017 13:31

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