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Proceedings Paper

The calibration of the spectroscopic diode laser sensor for the water vapour diagnostics at output of singlet oxygen generator for COIL
Author(s): A. V. Megenin; A. K. Chernyshov; V. N. Azyazov
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Paper Abstract

A1GaAs/GaAs quantum-well diode laser (824 nm) with the short external cavity was used for water diagnostics in the pumped out gas cell. The laser provided the 63 GHz continuous tuning of the optical frequency by the scanning of a pump current and a spectral linewidth of oscillation was less than 0,2 GHz. The experimentally obtained dependence of a second derivative amplitude on the vapour pressure coincides well with the calculated curve in the range of 0,4-20 Torr. The change of output signal close to linear was recorded at a pressure in the sample gas cell less than 5 Ton. The minimum concentration of H20, which is still measured by the diode laser sensor is estimated at a level 1,5x1015 molecule/cm3.

Paper Details

Date Published: 9 June 2005
PDF: 5 pages
Proc. SPIE 5773, Saratov Fall Meeting 2004: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling V, (9 June 2005); doi: 10.1117/12.636892
Show Author Affiliations
A. V. Megenin, P.N. Lebedev Physical Institute of Russian Academy of Sciences (Russia)
A. K. Chernyshov, P.N. Lebedev Physical Institute of Russian Academy of Sciences (Russia)
V. N. Azyazov, P.N. Lebedev Physical Institute of Russian Academy of Sciences (Russia)


Published in SPIE Proceedings Vol. 5773:
Saratov Fall Meeting 2004: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling V
Vladimir L. Derbov; Leonid A. Melnikov; Lev M. Babkov, Editor(s)

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