Abstract
We report on a novel nonlinear laser spectroscopic technique for single-shot imaging of ground-state hydrogen atoms in harsh environments. H atoms from the ground state were first pumped to the state via a two-photon excitation with a laser beam, and the population of the state was further probed through the transition with conventional polarization spectroscopy at . A single -pumped optical parametric oscillator laser system was enough to provide both laser beams. Single-shot visualization of native H atoms in an atmospheric pressure premixed flame is demonstrated.
© 2007 Optical Society of America
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