title: Single-shot imaging of ground-state hydrogen atoms with a nonlinear laser spectroscopic technique.
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 2s state via a two-photon excitation with a 243 nm laser beam, and the population of the 2s state was further probed through the 2s-4p transition with conventional polarization spectroscopy at 486 nm. A single Nd:YAG-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 H(2)/O(2) flame is demonstrated.
authors.affiliation: Division of Combustion Physics, Lund University, Lund, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Linvin
authors.forename: Z S
authors.initials: ZS
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Zetterberg
authors.forename: M
authors.initials: M
authors.lastname: Aldén