| Autor: |
Pushkarsky, Michael, Tsekoun, Alexei, Dunayevskiy, Ilya G., Go, Rowel, Patel, C. Kumar N. |
| Předmět: |
|
| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 7/18/2006, Vol. 103 Issue 29, p10846-10849, 4p |
| Abstrakt: |
We report the sub-parts-per-billion-level detection of NO2 using tunable laser-based photoacoustic spectroscopy where the laser radiation is obtained from a room-temperature continuous-wave high-power quantum cascade laser operating in an external grating cavity configuration. The continuously tunable external grating cavity quantum cascade laser produces maximum single-frequency output of ≈300 mW tunable over ≈350 nm centered at 6.25 μm. We demonstrate minimum detection level of ≈0.5 parts per billion of NO2 in the presence of humidified air. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
