Abstract
High temperature persistent spectral hole burning up to room temperature has been observed in Eu3+ ions doped oxy-fluoride glasses with a composition of 30CaF2–10Al2O3–60B2O3 (mol%) melted in a reducing atmosphere. The hole stability was studied through light-induced hole refilling and temperature cycling experiments. The burned holes survive thermal cycling to 300K due to a high barrier height of 0.69eV in the sample.
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