Fluorescence decay and recovery in organic dye-doped polymer optical fibers

Photostabilities of several dye-doped polymer optical fibers are investigat ed experimentally. In the spectral fluorescence of those fibers doped with dyes such as fluorescein and pyrromethene, a characteristic double-peak str ucture has been identified. The photobleaching induced by the irradiation o f an Ar laser output is found to be partially or completely reversible. Thi s depends on the type of dyes used and also on the intensity of irradiation . Also, a spectrally asymmetrical decay which corresponds to the differenti al photobleaching of the two peaks in the fluorescence spectra has been obs erved.