Multi-mode absorption spectroscopy of oxygen for measurement of concentration, temperature and pressure |
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Authors: | Y Arita R Stevens P Ewart |
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Institution: | (1) Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, UK |
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Abstract: | The use of multi-mode absorption spectroscopy (MUMAS) to detect multiple transitions in the A-band b1Σg
+-X3Σg
- of molecular oxygen is reported. The modelling of MUMAS signatures and the procedure for fitting such model signatures to
experimental data obtained using a multi-mode diode laser is described. The technique is shown to allow accurate and precise
measurement of concentration, temperature over the range 300 to 500 K and of pressure over the range 0.2 to 1 bar. Extension
of the technique to other ranges of temperature and pressure and to other species is discussed.
PACS 42.62.Fi; 33.20.Kf |
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Keywords: | |
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