Abstract
A Nd:YAG laser was Q switched twice during one flashlamp pulse and pumped a dye laser, whose frequency-doubled output, tuned to an OH absorption line, illuminated a planar region through a flame. The OH laser-induced fluorescence was focused onto an oscillating mirror, which directed the successive two-dimensional images onto different halves of a vidicon tube. Usable pair separation times of 40 to 180 μsec were obtained. The method has promise for studying changes in small-scale structure in turbulent reactive flows and for instantaneous measurement of the spatial distribution of two observables.
© 1984 Optical Society of America
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