The principle of fragmentary spectrum registration for acousto-optical spectrometers based on differential optical absorption spectroscopy

A. V. Fadeyev; Vitold E. Pozhar; V. I. Pustovoit

doi:10.1117/12.2029128

17 October 2013 The principle of fragmentary spectrum registration for acousto-optical spectrometers based on differential optical absorption spectroscopy

A. V. Fadeyev, Vitold E. Pozhar, V. I. Pustovoit

Author Affiliations +

Proceedings Volume 8890, Remote Sensing of Clouds and the Atmosphere XVIII; and Optics in Atmospheric Propagation and Adaptive Systems XVI; 88900H (2013) https://doi.org/10.1117/12.2029128
Event: SPIE Remote Sensing, 2013, Dresden, Germany

Abstract

A new analytical technique, named fragmentary spectrum registration (FSR), with use of acousto-optical spectrometers (AOS’s) is proposed and studied. It is based on the method of differential optical absorption spectroscopy (DOAS) and the unique AOS feature of fast (10 μs) random spectral access (RSA). The technique is the most efficient for objects exhibiting sparse optical spectra. The technique permits a substantial (up to 100 times) reduction of detection time in comparison with the record time of total spectrum and provides the decrease of inaccuracy of quantitative analysis of multicomponent mixtures containing substances with similar spectral features. The results of numerical simulation with use of real spectra detected by the trace gas monitoring system GAOS based on AOS are presented and discussed. The experimental results demonstrate the capabilities of the FSR-technique for the huge reduction of the measurement time or for the decrease of measurement error (up to 2.5 times) when the total measurement time is fixed while concentrations being varied from the environment background up to industrial emissions level.

Citation Download Citation

A. V. Fadeyev, Vitold E. Pozhar, and V. I. Pustovoit "The principle of fragmentary spectrum registration for acousto-optical spectrometers based on differential optical absorption spectroscopy", Proc. SPIE 8890, Remote Sensing of Clouds and the Atmosphere XVIII; and Optics in Atmospheric Propagation and Adaptive Systems XVI, 88900H (17 October 2013); https://doi.org/10.1117/12.2029128

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