Two-dimensional imaging of molecular hydrogen in H2–air diffusion flames using two-photon laser-induced fluorescence

Lempert, W. and Diskin, G and Kumar, V. and Glesk, Ivan and Miles, R (1991) Two-dimensional imaging of molecular hydrogen in H2–air diffusion flames using two-photon laser-induced fluorescence. Optics Letters, 61 (9). pp. 660-662. ISSN 0146-9592

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    Abstract

    We report the use of a tunable ArF laser at 193.26 nm to record simultaneous single-laser-shot, planar images of molecular hydrogen and hot oxygen in a turbulent H2–air diffusion flame. Excitation spectra of fuel and oxidant-rich flame zones confirm a partial overlap of the two-photon H2 (6,0) Q(1) E, F ← X and single-photon O2 (10,2) R(17) B ← X (Schumann-Runge) absorption bands. UV Rayleigh scattering images of flame structure and estimated detection limits for the H2 two-photon imaging are also presented.