Quantum cascade laser intracavity absorption sensor
| Autor: | Chris J. Fredricksen, Andrei V. Muraviev, Gautam Medhi, Robert E. Peale, Doug Maukonen |
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| Rok vydání: | 2013 |
| Předmět: |
Distributed feedback laser
Tunable diode laser absorption spectroscopy Materials science Absorption spectroscopy Physics::Instrumentation and Detectors business.industry Far-infrared laser Absorption cross section Physics::Optics Laser law.invention Optics Quantum dot laser law Optoelectronics business Quantum cascade laser |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2018193 |
| Popis: | A mid-infrared intracavity laser absorption spectrometer based on an external cavity multi-mode quantum cascade laser is combined with a scanning Fabry-Perot interferometer is used as tunable narrow band transmission filter to analyze the laser emission spectrum. Sensitivity as a trace gas detector at 8.1 micron wavelengths has been demonstrated based on a weak water vapor line at an absorption coefficient of 1 x 10 -5 cm -1 . For molecules of reasonably strong absorption cross section (10-17 cm 2 ), this corresponds to a detection limit of 40 ppb. |
| Databáze: | OpenAIRE |
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