Abstract

We have developed a simple new technique for measuring absolute radiative quantum efficiencies of fluorescing ions in solids that can be applied to systems exhibiting concentration quenching of the fluorescence. The technique requires measurement of the photoacoustic signal and fluorescent lifetime as a function of ion concentration. Application of this method to the upper laser level of Nd3+ in ED2 glass yields a value for the quantum efficiency somewhat smaller than that found in previous estimates and measurements.

© 1978 Optical Society of America

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