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Lead tungstate PbWO 4 nanocrystals in transparent lead borate glass-ceramics containing Er 3+ ions were fabricated. Luminescence spectra at about 1530 nm due to main 4 I 13/2 -4 I 15/2 laser transition of Er 3+ ions were examined for glass samples before and after heat treatment. Near-infrared luminescence of Er 3+ ions in glass-ceramics is enhanced and long-lived in comparison to precursor glasses. It suggests that the Er 3+ ions are partially incorporated into PbWO 4 crystalline phase.

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