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Hagelschuer, Till and Rothbart, Nick and Richter, Heiko and Wienold, Martin and Schrottke, Lutz and Grahn, H.T. and Hübers, Heinz-Wilhelm (2016) High-spectral-resolution terahertz imaging with a quantum-cascade laser. Optics Express. Optical Society of America. doi: 10.1364/oe.24.013839. ISSN 1094-4087.
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Abstract
We report on a high-spectral-resolution terahertz imaging system operating with a multi-mode quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector. By tuning the frequency of the QCL, several spectra can be recorded in 1.5 s during the scan through a gas cell filled with methanol (CH3OH). These experiments yield information about the local absorption and the linewidth. Measurements with a faster frame rate of up to 3 Hz allow for the dynamic observation of CH3OH gas leaking from a terahertz-transparent tube into the evacuated cell. In addition to the relative absorption, the local pressure is mapped by exploiting the effect of pressure broadening.
| Item URL in elib: | https://elib.dlr.de/105696/ | ||||||||||||||||||||||||||||||||
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| Document Type: | Article | ||||||||||||||||||||||||||||||||
| Title: | High-spectral-resolution terahertz imaging with a quantum-cascade laser | ||||||||||||||||||||||||||||||||
| Authors: |
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| Date: | 27 June 2016 | ||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Optics Express | ||||||||||||||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
| DOI: | 10.1364/oe.24.013839 | ||||||||||||||||||||||||||||||||
| Publisher: | Optical Society of America | ||||||||||||||||||||||||||||||||
| ISSN: | 1094-4087 | ||||||||||||||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||||||||||||||
| Keywords: | Terahertz Spectroscopy Terahertz Imaging Quantum-Cascade Lasers | ||||||||||||||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||
| HGF - Program: | Space | ||||||||||||||||||||||||||||||||
| HGF - Program Themes: | Earth Observation | ||||||||||||||||||||||||||||||||
| DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||||||
| DLR - Program: | R EO - Earth Observation | ||||||||||||||||||||||||||||||||
| DLR - Research theme (Project): | R - Vorhaben IR-Sensorik, IR-Missionsprojekte (old) | ||||||||||||||||||||||||||||||||
| Location: | Berlin-Adlershof | ||||||||||||||||||||||||||||||||
| Institutes and Institutions: | Institute of Optical Sensor Systems | ||||||||||||||||||||||||||||||||
| Deposited By: | Hagelschuer, Till | ||||||||||||||||||||||||||||||||
| Deposited On: | 12 Aug 2016 11:29 | ||||||||||||||||||||||||||||||||
| Last Modified: | 27 Nov 2023 14:01 |
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