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Resonant absorption of first-overtone CO laser radiation by atmospheric water vapor and pollutants

Published online by Cambridge University Press:  17 May 2001

O.G. BUZYKIN ,
A.A. IONIN ,
S.V. IVANOV ,
A.A. KOTKOV ,
L.V. SELEZNEV  and
A.V. SHUSTOV
O.G. BUZYKIN
Affiliation:
Central Aerohydrodynamic Institute (TsAGI), 140160, Zhukovsky-3, Moscow Region, Russia
A.A. IONIN
Affiliation:
P.N.Lebedev Physics Institute of Russian Academy of Sciences, 53 Leninsky prospect, 117924 Moscow, Russia
S.V. IVANOV
Affiliation:
Institute on Laser Information Technologies of Russian Academy of Sciences (ILIT RAS), 2 Pionerskaya, 142092, Troitsk, Moscow Region, Russia
A.A. KOTKOV
Affiliation:
P.N.Lebedev Physics Institute of Russian Academy of Sciences, 53 Leninsky prospect, 117924 Moscow, Russia
L.V. SELEZNEV
Affiliation:
P.N.Lebedev Physics Institute of Russian Academy of Sciences, 53 Leninsky prospect, 117924 Moscow, Russia
A.V. SHUSTOV
Affiliation:
Central Aerohydrodynamic Institute (TsAGI), 140160, Zhukovsky-3, Moscow Region, Russia
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Abstract

Resonant absorption of first-overtone (FO) CO laser radiation by atmospheric water vapor and various organic and nonorganic pollutants is discussed. Suitable ro-vibrational lines are selected for their potential use in traditional spectroscopic schemes of atmospheric pollution diagnostics. Nonlinear atmospheric absorption of intense multiline FO CO laser radiation is simulated and laser-induced changes in absorption spectra are demonstrated. Absorption coefficients of a few substances on several FO CO ro-vibrational lines are experimentally measured. A comparative analysis of spectral characteristics of an FO CO laser and an HF (DF) laser demonstrates that the potential of FO CO laser applications for spectroscopic detection of various molecular trace gases is greater than that of HF and DF lasers.

Keywords

atmospheric absorptionDF laserHF lasernonequilibrium absorptionovertone CO laservibrational excitationvibration-rotational spectra
Type
Research Article
Information
Laser and Particle Beams , Volume 18 , Issue 4 , October 2000 , pp. 697 - 713
Copyright
© 2000 Cambridge University Press

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