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Rothbart, Nick and Hübers, Heinz-Wilhelm and Schmalz, K. (2020) A Compact Circular Multipass Cell for Millimeter-Wave/Terahertz Gas Spectroscopy. IEEE Transactions on Terahertz Science and Technology, 10 (1), pp. 9-14. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TTHZ.2019.2950123. ISSN 2156-342X.
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Official URL: https://ieeexplore.ieee.org/document/8884743?source=authoralert
Abstract
Millimeter-wave/terahertz (mmW/THz) spectroscopy is a promising tool for gas sensing applications, such as breath analysis or the detection of toxic chemicals, which require compact portable systems. Long gas cells that are needed for high sensitivities are often bulky and limit the portability of the system. We present a compact mmW/THz circular multipass gas cell with an optical path length of 1.9 m and an outer diameter of only 21.5 cm. The beam is refocused at each internal reflection as a consequence of the large divergence of the mmW/THz beams. We determined the losses of the cell to about 3 dB around 250 GHz and demonstrated sensitive gas spectroscopy with a detection limit of 14 ppm/√Hz for acetaldehyde in a mixture with methanol.
| Item URL in elib: | https://elib.dlr.de/137729/ | ||||||||||||||||
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| Document Type: | Article | ||||||||||||||||
| Title: | A Compact Circular Multipass Cell for Millimeter-Wave/Terahertz Gas Spectroscopy | ||||||||||||||||
| Authors: |
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| Date: | January 2020 | ||||||||||||||||
| Journal or Publication Title: | IEEE Transactions on Terahertz Science and Technology | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||
| Volume: | 10 | ||||||||||||||||
| DOI: | 10.1109/TTHZ.2019.2950123 | ||||||||||||||||
| Page Range: | pp. 9-14 | ||||||||||||||||
| Publisher: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||
| ISSN: | 2156-342X | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Terahertz, Millimeterwellen, Gasspektroskopie | ||||||||||||||||
| 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 - Terahertz spectrometer for atomic oxygen in the mesosphere/thermosphere | ||||||||||||||||
| Location: | Berlin-Adlershof | ||||||||||||||||
| Institutes and Institutions: | Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy | ||||||||||||||||
| Deposited By: | Rothbart, Nick | ||||||||||||||||
| Deposited On: | 25 Nov 2020 13:55 | ||||||||||||||||
| Last Modified: | 24 Oct 2023 13:49 |
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