Physics – Optics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apopt..32.4636v&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 32, no. 24, p. 4636-4640.
Physics
Optics
1
Imaging Techniques, Laser Induced Fluorescence, Nonintrusive Measurement, Photochemical Reactions, Oxygen Atoms, Premixed Flames, Spatial Resolution
Scientific paper
We demonstrate that 1D, two-photon laser-induced fluorescence imaging of oxygen atoms in flames can be achieved with reasonable signal intensities and spatial resolution but without the interference caused by the photolysis of O2, by the use of a beam telescope instead of a focusing lens. The increase in probed volume (and concomitantly the number of excitable atoms) caused by the larger beam diameter in the telescope experiments offsets, to a certain extent, the loss in signal that is due to the reduced laser fluence. Further, the results show that the 'correct' dependence of the fluorescence intensity on laser fluence (in this case quadratic) does not guarantee the absence of photochemistry.
Borghols Wim T. A.
Jacobs Rob A. A. M.
Levinsky Howard B.
van der Meij Christine E.
van Oostendorp Dirk L.
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