Laser techniques are now among the most important tools in the characterization of combustion phenomena. The present paper reviews the application of laser-induced fluorescence (LIF) in the study of molecules, radicals and atoms, e.g. CO, C2, CH, OH, O, and H. LIF also makes spatially resolved measurements possible by using diode-array detectors or vidicons. The other laser technique which will be reviewed is Coherent Anti-Stokes Raman Scattering (CARS), which, due to its coherent nature, makes “real-world” measurements possible. In this context examples from CARS experiments on a 4 MW burner, fuelled with heavy oil will be given.
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