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Proceedings Paper

Tunable diode laser spectroscopy for industrial process applications
Author(s): Kevin Duffin; Andrew McGettrick; Walter Johnstone; George Stewart
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Paper Abstract

An alternative approach to signal recovery in tunable diode laser spectroscopy with wavelength modulation is proposed and investigated. Measurements of transmission spectra of methane in nitrogen are compared with equivalent data in the HITRAN data base and curve fitting of HITRAN data to that measured have been used to obtain gas concentration and pressure. The results validate the new technique and demonstrate that absolute measurements of rotation / vibration gas line transmission functions, gas concentration and gas pressure can be made accurately without the need for calibration.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 661927 (2 July 2007); doi: 10.1117/12.738641
Show Author Affiliations
Kevin Duffin, Univ. of Strathclyde (United Kingdom)
Andrew McGettrick, Univ. of Strathclyde (United Kingdom)
Walter Johnstone, Univ. of Strathclyde (United Kingdom)
George Stewart, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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