期刊
SENSORS
卷 12, 期 12, 页码 16466-16481出版社
MDPI
DOI: 10.3390/s121216466
关键词
optical dispersion spectroscopy; laser spectroscopy; remote sensing; quantum cascade lasers
资金
- NSF [CMMI-0954897, EEC-1128282]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0954897] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Engineering Education and Centers [1128282] Funding Source: National Science Foundation
In this paper we present a prototype instrument for remote open-path detection of nitrous oxide. The sensor is based on a 4.53 mu m quantum cascade laser and uses the chirped laser dispersion spectroscopy (CLaDS) technique for molecular concentration measurements. To the best of our knowledge this is the first demonstration of open-path laser-based trace-gas detection using a molecular dispersion measurement. The prototype sensor achieves a detection limit down to the single-ppbv level and exhibits excellent stability and robustness. The instrument characterization, field deployment performance, and the advantages of applying dispersion sensing to sensitive trace-gas detection in a remote open-path configuration are presented.
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