Summary
The capabilities of high resolution diode laser spectroscopy applied to the trace gas analysis of polyatomic molecules have been investigated. The experiments have been carried out with a pulsed diode spectrometer with periodic, frequency scanning and frequency scale reproducibility of 10−4 cm −1 for an hour and an optical cell length of 1 m. A method with an absorption sensitivity increased up to 10 has been developed. The correlation processing, method was applied to large spectral ranges including 103 – 104 lines allowing an additional signal/noise ratio increase to be obtained. An analog processing7 method with high resonance absorption sensitivity of 10−6 ∓ 10−7 and a time constant of 1 s was also used.
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References
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© 1987 ECSC, EEC, EAEC, Brussels and Luxembourg
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Zasavitsky, I.I., Nadezhdinsky, A.I. (1987). Spectral Gas Analysis of Polyatomic Molecules by Tunable Diode Lasers. In: Grisar, R., Preier, H., Schmidtke, G., Restelli, G. (eds) Monitoring of Gaseous Pollutants by Tunable Diode Lasers. Air Pollution Research Reports. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3991-2_15
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DOI: https://doi.org/10.1007/978-94-009-3991-2_15
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