Laser-induced fluorescence of vibrationally excited nitric oxide by femtosecond laser pulse.

The fluorescence of nitric oxide excited molecules NO A2Σ occurring through two-color laser action on nitrogen dioxide NO 2 has been studied. The NO 2 pre-photofragmentation stage was carried out by a 355 nm ns laser pulse to obtain vibrationally excited NO X2Π, ν ''(1) molecules. Subsequent femtosecond 472 nm laser pulse at an intensity of ∼300 GW/cm2 led to the induced fluorescence of NO A2Σ, ν ′(0) as a result of two-photon resonance absorption by the NO A2Σ–X2Π, ν ' ν '' (0,1) band. • Two-color laser action on nitrogen dioxide. • Photofragmentation of nitrogen dioxide by 355 nm laser pulse. • Detection of vibrationally excited NO X2Π, v''(1) by visible femtosecond 472 nm laser pulse. [ABSTRACT FROM AUTHOR]