Optically transparent Er<sup>3+</sup>/Tm<sup>3+</sup>/Yb<sup>3+</sup> tri-doped oxyfluoride tellurite based nano-crystallized glass ceramics with the batching composition of 73TeO<sub>2</sub>-15ZnO-7ZnF<sub>2</sub>-3YF<sub>3</sub>-1.5YbF<sub>3</sub>-0.3ErF<sub>3</sub>-0.2TmF<sub>3</sub> (mol%) is prepared by a conventional melting quenching and the subsequent heat treatment processes. The sizes of grown nano-crystals in glass matrix appear to be smaller than 100 nm from the scanning electron microscope measurement. Visible up-conversion luminescence of the as melted glass and glass ceramics is investigated. The three-color up-conversion luminescence intensities by 980-nm pumping are increased significantly due to the heat treatment, and the blue intensity increases with a higher magnitude than other wavelengths after heat treatment.
© 2010 Chinese Optics Letters
(160.2540) Materials : Fluorescent and luminescent materials
(160.2750) Materials : Glass and other amorphous materials
(160.4760) Materials : Optical properties
(160.5690) Materials : Rare-earth-doped materials
Chunlei Yu, Dongbing He, Guonian Wang, Junjie Zhang, and Lili Hu, "Enhancement of up-conversion luminescence properties in Yb3+/Tm3+/Er3+ tri-doped transparent oxyfluoride tellurite glass ceramics," Chin. Opt. Lett. 8, 197-198 (2010)