Multi-species detection using multi-mode absorption spectroscopy (MUMAS) |
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| Authors: | J H Northern A W J Thompson M L Hamilton P Ewart |
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| Institution: | 1. Physics Department, Oxford University, Parks Road, Oxford, OX1 3PU, UK
2. School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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| Abstract: | The detection of multiple species using a single laser and single detector employing multi-mode absorption spectroscopy (MUMAS) is reported. An in-house constructed, diode-pumped, Er:Yb:glass micro-laser operating at 1,565 nm with 10 modes separated by 18 GHz was used to record MUMAS signals in a gas mixture containing C2H2, N2O and CO. The components of the mixture were detected simultaneously by identifying multiple transitions in each of the species. By using temperature- and pressure-dependent modelled spectral fits to the data, partial pressures of each species in the mixture were determined with an uncertainty of ±2 %. |
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