The calibration of the spectroscopic diode laser sensor for the water vapour diagnostics at output of singlet oxygen generator for COIL

A. V. Megenin; A. K. Chernyshov; V. N. Azyazov

doi:10.1117/12.636892

9 June 2005 The calibration of the spectroscopic diode laser sensor for the water vapour diagnostics at output of singlet oxygen generator for COIL

A. V. Megenin, A. K. Chernyshov, V. N. Azyazov

Author Affiliations +

Proceedings Volume 5773, Saratov Fall Meeting 2004: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling V; (2005) https://doi.org/10.1117/12.636892
Event: Saratov, Russia, 2004, Saratov, Russian Federation

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.

Citation Download Citation

A. V. Megenin, A. K. Chernyshov, and V. N. Azyazov "The calibration of the spectroscopic diode laser sensor for the water vapour diagnostics at output of singlet oxygen generator for COIL", Proc. SPIE 5773, Saratov Fall Meeting 2004: Laser Physics and Photonics, Spectroscopy, and Molecular Modeling V, (9 June 2005); https://doi.org/10.1117/12.636892

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