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Rothbart, Nick und Hübers, Heinz-Wilhelm und Schmalz, K. (2020) A Compact Circular Multipass Cell for Millimeter-Wave/Terahertz Gas Spectroscopy. IEEE Transactions on Terahertz Science and Technology, 10 (1), Seiten 9-14. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TTHZ.2019.2950123. ISSN 2156-342X.
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Offizielle URL: https://ieeexplore.ieee.org/document/8884743?source=authoralert
Kurzfassung
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.
| elib-URL des Eintrags: | https://elib.dlr.de/137729/ | ||||||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
| Titel: | A Compact Circular Multipass Cell for Millimeter-Wave/Terahertz Gas Spectroscopy | ||||||||||||||||
| Autoren: |
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| Datum: | Januar 2020 | ||||||||||||||||
| Erschienen in: | IEEE Transactions on Terahertz Science and Technology | ||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||
| Open Access: | Nein | ||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||
| In SCOPUS: | Ja | ||||||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||||||
| Band: | 10 | ||||||||||||||||
| DOI: | 10.1109/TTHZ.2019.2950123 | ||||||||||||||||
| Seitenbereich: | Seiten 9-14 | ||||||||||||||||
| Verlag: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||
| ISSN: | 2156-342X | ||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||
| Stichwörter: | Terahertz, Millimeterwellen, Gasspektroskopie | ||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
| HGF - Programm: | Raumfahrt | ||||||||||||||||
| HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||
| DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||
| DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | R - Terahertz-Spektrometer für atomaren Sauerstoff in der Mesosphäre/Thermosphäre | ||||||||||||||||
| Standort: | Berlin-Adlershof | ||||||||||||||||
| Institute & Einrichtungen: | Institut für Optische Sensorsysteme > Terahertz- und Laserspektroskopie | ||||||||||||||||
| Hinterlegt von: | Rothbart, Nick | ||||||||||||||||
| Hinterlegt am: | 25 Nov 2020 13:55 | ||||||||||||||||
| Letzte Änderung: | 24 Okt 2023 13:49 |
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