Abstract
We describe our observation of stimulated emission (SE) from the atomic oxygen 33P—33S transition at 845 nm following two-photon excitation of the 23P—33P transition using 228-nm laser radiation. We studied this SE process in flames and room temperature flows of Q2 and N2O, comparing its behavior to fluorescence (FL) signals acquired simultaneously. Rapid depletion of the laser-excited state by the SE process may impact the use of diagnostic techniques based on multiphoton excitation in oxygen and other species.
© 1989 Optical Society of America
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