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Multi-species detection using multi-mode absorption spectroscopy (MUMAS)

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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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Acknowledgments

This work was supported by a grant from the Engineering and Physical Sciences Research Council, EPSRC (UK). HN, AT and MH are grateful to the EPSRC for personal financial support.

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Correspondence to P. Ewart.

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Northern, J.H., Thompson, A.W.J., Hamilton, M.L. et al. Multi-species detection using multi-mode absorption spectroscopy (MUMAS). Appl. Phys. B 111, 627–635 (2013). https://doi.org/10.1007/s00340-013-5382-9

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  • DOI: https://doi.org/10.1007/s00340-013-5382-9

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