Novel pulsed and cw quantum cascade distributed feedback (QC-DFB) lasers operating near λ = 8 μm were used for detection and quantification of trace gases in ambient air by means of sensitive absorption spectroscopy. N2O, 12CH4, 13CH4, and different isotopic species of H2O were detected. Also, a highly selective detection of ethanol vapor in air with a sensitivity of 125 parts per billion by volume (ppb) was demonstrated.
|Original language||English (US)|
|Number of pages||11|
|State||Published - Jan 2001|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Industrial and Manufacturing Engineering