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Proceedings Paper

Measurement of small gas impurity with application of multichannel diode laser spectroscopy
Author(s): I. V. Nikolaev; V. N. Ochkin; M. V. Spiridonov; S. N. Tskhai
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Paper Abstract

Diode laser spectroscopy with multipass cell and typically three channels are discussed. In the first analytical channel a laser beam goes through multipass cell with a gas sample. In the second base-line recording channel the output laser intensity without absorption is recorded. The third reference channel is used for several additional aims. The information in all channels is used for analyzing and to improve a detection sensitivity. New technique of wavelength modulation is proposed with substation depress of residual amplitude modulation. The technique was applied to measure a background concentrations of NO2 and ratio of isotopes 12CO2/13CO2 in atmosphere.

Paper Details

Date Published: 29 April 2008
PDF: 8 pages
Proc. SPIE 7006, Lasers for Measurements and Information Transfer 2007, 70060F (29 April 2008); doi: 10.1117/12.802275
Show Author Affiliations
I. V. Nikolaev, P.N. Lebedev Physical Institute (Russia)
V. N. Ochkin, P.N. Lebedev Physical Institute (Russia)
M. V. Spiridonov, P.N. Lebedev Physical Institute (Russia)
S. N. Tskhai, P.N. Lebedev Physical Institute (Russia)

Published in SPIE Proceedings Vol. 7006:
Lasers for Measurements and Information Transfer 2007

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