Sub-parts-per-billion level detection of NO <sub>2</sub> using room-temperature quantum cascade lasers

Proceedings of the National Academy of Sciences of the United States of America - Tập 103 Số 29 - Trang 10846-10849 - 2006
Michael Pushkarsky1, Alexei Tsekoun1, Ilya Dunayevskiy1, Rowel Go1, C. Kumar N. Patel1,2
1*Pranalytica, Inc., 1101 Colorado Avenue, Santa Monica, CA 90401; and
2Department of Physics and Astronomy, University of California, Los Angles, CA 90095

Tóm tắt

We report the sub-parts-per-billion-level detection of NO 2 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 NO 2 in the presence of humidified air.

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Tài liệu tham khảo

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Thông tin xuất bản

Proceedings of the National Academy of Sciences of the United States of America

Tập 103 Số 29

10846-10849

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