Abstract
Methane and Nitrous Oxide are long-lived greenhouse gases in the atmosphere with significant global warming effects. We report on application of chirped-pulsed quantum cascade lasers (QCLs) to simultaneous measurements of these trace gases in both open-path fence-line and backscatter systems. The intra-pulse thermal frequency chip in a QCL can be time resolved and calibrated to allow for high resolution differential optical absorption spectroscopy over the spectral window of the chip, which for a DFB-QCL can be reach ∼ 2cm-1 for a 500 nsec pulse. The spectral line-shape of the output from these lasers are highly stable from pulse to pulse over long period of time (> 1 day), and the system does not require frequent calibrations.
Original language | English (US) |
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Title of host publication | Remote Sensing of Clouds and the Atmosphere XX |
Editors | Evgueni I. Kassianov, Richard H. Picard, Klaus Schafer, Adolfo Comeron, Konradin Weber |
Publisher | SPIE |
Volume | 9640 |
ISBN (Electronic) | 9781628418507 |
DOIs | |
State | Published - Jan 1 2015 |
Externally published | Yes |
Event | Remote Sensing of Clouds and the Atmosphere XX - Toulouse, France Duration: Sep 23 2015 → Sep 24 2015 |
Other
Other | Remote Sensing of Clouds and the Atmosphere XX |
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Country/Territory | France |
City | Toulouse |
Period | 9/23/15 → 9/24/15 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering