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Lasers in flame

Probing temperature and radical species in a flame using 4-wave mixing spectroscopy.

Professor Paul Ewart

Emeritus Professor

Sub department

  • Atomic and Laser Physics
paul.ewart@physics.ox.ac.uk
  • About
  • Publications

High precision measurement of combustion parameters in flames and engines using Laser Induced Grating Scattering, LIGS

Optica Publishing Group (2017) eth2a.2

Authors:

A Luers, A-L Sahlberg, F Förster, C Willman, J Camm, R Stone, B Williams, P Ewart
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Laser-based measurements of combustion engines – inside and outside

Optica Publishing Group (2017) ftu4e.3

Authors:

Paul Ewart, Benjamin AO Williams
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Tomographic Infrared Multi-Mode Absorption Spectroscopy for spatially resolved multi-species detection

Optica Publishing Group (2017) em2b.3

Authors:

S O’Hagan, H Northern, J Dai, W Cai, P Ewart
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Multi-mode absorption spectroscopy using a Quantum Cascade Laser for simultaneous detection of NO and H2O

Applied Physics B: Lasers and Optics Springer Verlag 122:8 (2016) 226

Authors:

Paul Ewart, S O'Hagan, T Pinto, GAD Ritchie

Abstract:

Detection of multiple transitions in NO and H2O using multi-mode absorption spectroscopy, MUMAS, with a quantum cascade laser, QCL, operating at 5.3 m at scan rates up to 10 kHz is reported. The linewidth of longitudinal modes of the QCL are derived from pressure-dependent fits to experimental MUMAS data. Variations in the spectral structure of the broadband, multi-mode, output of the commercially available QCL employed are analysed to provide accurate fits of modelled MUMAS signatures to the experimental data.
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Multi-species sensing using multi-mode absorption spectroscopy with mid-infrared interband cascade lasers

Optics InfoBase Conference Papers (2016)

Authors:

S O'Hagan, JH Northern, B Gras, P Ewart, CS Kim, M Kim, CD Merritt, WW Bewley, CL Canedy, J Abell, I Vurgaftman, JR Meyer

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