Abstract
Intense new upconversion has been observed at 525 nm in addition to those reported earlier when Ho3+ doped tellurite glass is pumped with 890-nm NIR radiation. The effect of the addition of PbO2/BaCO3 in Ho3+:LiTeO2 glass on upconversion emission and its use as a temperature sensor were studied. It is found that these additives improve the performance of these glasses.
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