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Proceedings Paper

Wavelength modulation spectroscopy due to unsteady heating of a diode laser active medium
Author(s): S. N. Andreev; I. V. Nikolaev; V. N. Ochkin; S. Yu. Savinov; M. V. Spiridonov; S. N. Tskhai
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Paper Abstract

A special shape of modulation of laser diode injection current is provided when the frequency modulation is not accompanied with amplitude modulation. Such approach permits to suppress essentially the influence of laser emission instabilities. When being applied to gas analysis it gives the possibility of long-term remote components monitoring. The stable relative absorptions of 8xl0-7 without special calibration are demonstrated. In combination with multipass cell (50 cm between the mirrors, 90 m optical length) it gives the absorption coefficient of l.2x10-10cm-1. As an example the daily evolution of atmosphere NO2 admixtures have been measured with a precision of O.5ppb.

Paper Details

Date Published: 12 December 2006
PDF: 6 pages
Proc. SPIE 6580, 15th Symposium on High-Resolution Molecular Spectroscopy, 65800L (12 December 2006); doi: 10.1117/12.724931
Show Author Affiliations
S. N. Andreev, P.N. Lebedev Physical Institute (Russia)
I. V. Nikolaev, P.N. Lebedev Physical Institute (Russia)
V. N. Ochkin, P.N. Lebedev Physical Institute (Russia)
S. Yu. Savinov, 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. 6580:
15th Symposium on High-Resolution Molecular Spectroscopy
Yurii N. Ponomarev; Semen N. Mikhailenko; Leonid N. Sinitsa, Editor(s)

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