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Fast Spectral Terahertz Imaging through Frequency Tuning in a Quantum-Cascade Laser

Hagelschuer, Till and Rothbart, Nick and Richter, Heiko and Wienold, Martin and Schrottke, Lutz and Grahn, Holger T. and Hübers, Heinz-Wilhelm (2016) Fast Spectral Terahertz Imaging through Frequency Tuning in a Quantum-Cascade Laser. In: 7th International Quantum Cascade Lasers School and Workshop. 7th International Quantum Cascade Lasers School and Workshop, 04.-09. September 2016, Cambridge, United Kingdom.

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Abstract

Due to a variety of molecular rotational lines, spectroscopy in the terahertz (THz) spectral region is a powerful tool. It can be applied to detect and identify numerous chemical compounds in particular gases. Thus, it holds a large potential for a broad range of applications e.g. in astrophysics, medicine, and security. At present, THz imaging is realized with a variety of different techniques. However, relatively little work has been done regarding the combination of THz spectroscopy and imaging. In this contribution, we will present a QCL-based spectrometer that is capable of fast spectral imaging with a resolving power in the order of 10^6 and with high spatial resolution. The spectral information is obtained by tuning the frequency of the QCL. Frame rates of up to 3 Hz are realized by the combination of a fast scanning mirror (FSM) and a sensitive single-pixel Ge:Ga detector with a short response time.

Item URL in elib:https://elib.dlr.de/110209/
Document Type:Conference or Workshop Item (Poster)
Additional Information:Veröffentlichung im Rahmen der Helmholtz Research School on Security Technologies (HRSST)
Title:Fast Spectral Terahertz Imaging through Frequency Tuning in 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
Schrottke, Lutzlutz (at) pdi-berlin.deUNSPECIFIED
Grahn, Holger T.htgrahn (at) pdi-berlin.deUNSPECIFIED
Hübers, Heinz-Wilhelmheinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:September 2016
Journal or Publication Title:7th International Quantum Cascade Lasers School and Workshop
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:7th International Quantum Cascade Lasers School and Workshop
Event Location:Cambridge, United Kingdom
Event Type:Workshop
Event Dates:04.-09. 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
Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Hagelschuer, Till
Deposited On:05 Jan 2017 16:18
Last Modified:11 Sep 2017 13:30

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