Quenching of laser dye fluorescence by absorption from an excited singlet state

Abstract

Quenching of fluorescence of common laser dyes is observed and measured as a function of the intensity of an excitation pulse at 3371 Å and the concentration of the dye. The observed effects can be explained by a model where there are sequential absorptions of pump radiation from the ground state and first excited singlet state followed by a radiationless decay, and where molecules can be cycled many times during each excitation pulse.