Abstract
A simple phosphoroscope with no moving parts is described. In one scan the
total luminescence, the long-lived phosphorescence, and the short-lived fluorescence
can be determined. A 50% duty cycle excitation from a diode laser is used to excite
the sample, and from the digitized waveform the phosphorescence is extracted from
the off period, the total emission from the full cycle, and the fluorescence from
the on period corrected for the phosphorescence contribution. The performance of the
system is demonstrated using room-temperature phosphorescence of organic dyes in
boric acid glasses, a multi-emissive boron-polymer dye, and a europium
chelate.
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