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Enhanced mid-IR emission in Yb3+–Tm3+ co-doped oxyfluoride glass ceramics
- Source :
-
Journal of Alloys & Compounds . Feb2011, Vol. 509 Issue 6, p3032-3037. 6p. - Publication Year :
- 2011
-
Abstract
- Abstract: Tm3+–Yb3+ co-doped transparent oxyfluoride glass ceramics were prepared through thermal treatment of the as-prepared glasses. The precipitation of nanocrystals and the incorporation of Tm3+ and Yb3+ into the nanocrystals were confirmed by X-ray diffraction and absorption spectra. Based on the Judd–Ofelt theory, the J–O parameters Ω λ (λ =2, 4, 6), spontaneous radiative transition rates, radiative lifetimes and fluorescence branching ratios of Tm3+ in both as-prepared glasses and glass ceramics were calculated. Intense mid-IR emission and upconversion luminescence in the Tm3+ and Yb3+ co-doped glass ceramics were observed under 980nm excitation. Especially, compared with that of the as-prepared glasses, mid-IR luminescence intensity of Tm3+ in the glass ceramics was greatly enhanced. Desirable spectroscopic characteristics suggest that these oxyfluoride glass ceramics may be promising mid-IR laser active medium. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 509
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 57298937
- Full Text :
- https://doi.org/10.1016/j.jallcom.2010.11.192