Analysis of gaseous mixtures with multifrequency NH3 laser spectrometer

The first results of quantitative analysis of gaseous mixtures with aid of laser spectrometer, based on a pulsed NH3 laser with optical pump of the TE A CO2 laser are reported. In the first part the general properties of the N H3 laser are briefly described along with a theoretical model and some resu lts of numerical modeling. The main difference of the laser is simultaneous multifrequency generation. In the second part of the paper, results of mea surements of partial pressures of multicomponent admixtures in atmospheric pressure air are presented. It is experimentally shown, that at least four- component admixture can be analyzed with this type of spectrometer. This re sult can he used as preliminary step in development of a new type of remote laser spectrometer. (C) 2000 Published by Elsevier Science B.V. All rights reserved.