Wideband CO laser in problems of laser sensing of minor gaseous components in the atmosphere |
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Authors: | A?A?Ionin Yu?M?Klimachev A?Yu?Kozlov A?A?Kotkov O?A?Romanovskii L?V?Seleznev D?V?Sinitsyn Email author" target="_blank">O?V?KharchenkoEmail author A?V?Shelestovich S?V?Yakovlev |
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Institution: | (1) P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia;(2) Tomsk State University, Tomsk, Russia;(3) Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia |
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Abstract: | In the present work it is demonstrated that a wideband CO laser operating at fundamental and overtone vibrational transitions
is a promising source of laser radiation for remote laser sensing of the atmosphere. A compact slab RF-discharge CO laser
has been designed. The optimal operating conditions are determined for this CO laser. In experiments, the maximum average
output laser power was ∼12 W for lasing efficiency of ∼14%. Under fixed experimental conditions, stable lasing (with fluctuations
of the output laser characteristics ≤5%) was observed during more than one hour, which suggests that we first excited the
sealed-off mode of cryogenic slab RF-discharge CO laser. The frequency-selective mode was first obtained for this laser. Wavelengths
for sensing of nitrous oxide, nitrogen dioxide, methane, formaldehyde, and some other gases on near-ground propagation paths
are determined. Our experiments and calculations confirm that this CO laser is promising for laser gas analysis.
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 76–83, November, 2008. |
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Keywords: | CO laser laser sensing laser gas analysis |
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