Sub-parts-per-billion level detection of NO2 using room-temperature quantum cascade lasers

被引：114
|
作者：
Pushkarsky, Michael
Tsekoun, Alexei
Dunayevskiy, Ilya G.
Go, Rowel
Patel, C. Kumar N.
机构：
[1] Pranalyt Inc, Santa Monica, CA 90401 USA
[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
来源：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2006年 / 103卷 / 29期
关键词：
iR lasers; NO2; spectroscopy; photoacoustic spectroscopy; sub-parts-per-billion detection of gases;
D O I：
10.1073/pnas.0604238103
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 approximate to 300 mW tunable over approximate to 350 nm centered at 6.25 mu m.We demonstrate minimum detection level of approximate to 0.5 parts per billion of NO2 in the presence of humidified air.
引用
收藏
页码：10846 / 10849
页数：4
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