Abstract
We report on persistent spectral hole burning in the x-ray-irradiated Sm3+-doped fluoroaluminate glasses at room temperature. 0.1SmF3·14.9YF3·10MgF2·20CaF2 10SrF2·10BaF2·35AlF3 (mol%) glass was prepared underan Ar + NF3 (5 vol.%) atmosphere. Absorption andphotoluminescence spectra showed that some of the Sm3+ ions in theglass sample were reduced to Sm2+ ions after the x-ray irradiation.The hole was burned in the 7F0-5D0 line of the Sm2+ ions by means of a DCM dye laser. No antihole or increasedexcitation (absorption) peak was observed around the burned hole. It wasconcluded that the persistent spectral hole burning was formed by theoptically activated recombination of the electrons trapped by the Sm3+ ions with the trapped holes.
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