| Zugriffsnummer | 48808 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Fast simultaneous CO2 gas temperature sensing and concentration measurements by quantum cascade laser absorption spectroscopy |
| Autor(in); Institution |
Herklotz, Frank; Technische Universität Dresden, Department of Physics, Dresden, GERMANY
Sinnreich, Malte; Humedics GmbH, Berlin, GERMANY
Helmke, Alexander; Humedics GmbH, Berlin, GERMANY
von Haimberger, Theodore; deceased author; Freie Universität Berlin, Department of Physics, Berlin, GERMANY
Heyne, Karsten; Freie Universität Berlin, Department of Physics, Berlin, GERMANY
|
| Quelle/Jahr | Laser Diagnostics and Its Application. Applied Sciences: 12 (2022), 10, 1 - 9 |
| Artikelnummer | 5057 |
| Availability | [online only] |
| ISSN | 2076-3417 (ONLINE) |
| DOI | |
| Verlag | Basel: MDPI |
| Freie Schlagworte | optical sensing ; quantum cascade laser ; laser absorptions spectroscopy |
| Zusammenfassung | A quantum cascade laser-based sensing technique is presented which allows for in situ highprecision temperature and/or CO2 concentration measurements of gases in the room temperature regime with sampling rates up to about 40 kHz. The method is based on Boltzmann-like thermally populated fundamental and hot-band rovibrational transitions of CO2 with opposite temperature dependence. Single absorption spectra at about 2350 to 2352 cm-1 are recorded by a nanosecond frequency down chirped IR pulse of a pulsed distributed feedback quantum cascade laser (intrapulse mode). The statistical uncertainty (1σ) in the temperature measurement within one laser pulse is about 1 K and can be further reduced down to about 0.1 K by time averaging over 100 ms. Online temperature and CO2 concentration measurements on a breath simulator controlled gas flow were performed to demonstrate response-time and sensitivity for an application-driven test system. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
Zitierung
Herklotz, F., Rubin, T., Sinnreich, M., Helmke, A., von Haimberger, T., & Heyne, K. (2022). Fast simultaneous CO₂ gas temperature sensing and concentration measurements by quantum cascade laser absorption spectroscopy. Applied Sciences, 12(10), 1–9. https://doi.org/10.3390/app12105057