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Energy transfer and 1.8μm emission in Yb3+/Tm3+ co-doped bismuth germanate glass.
- Source :
-
Ceramics International . May2014, Vol. 40 Issue 4, p6037-6043. 7p. - Publication Year :
- 2014
-
Abstract
- Abstract: This study presents the luminescent properties of Yb3+/Tm3+ co-dopant ions inside a new host glass based on bismuth germanates. Judd–Ofelt intense parameters, radiative transition rate, radiative lifetime, and branching ratios of Tm3+ in the present glass are calculated based on the absorption spectrum. A strong 1.8μm emission was observed in the Yb3+/Tm3+ co-doped bismuth germanate glass upon the excitation of a conventional 980nm laser diode. Using a spectral overlap model, the micro parameter for direct energy transfer from Yb3+ ions to Tm3+ ions (C DA ) was found to be almost 30 times larger than the back energy transfer from Tm3+ ions to Yb3+ ions (C AD ). The linear dependence of energy transfer probability on the co-dopant concentration exhibits that the energy transfer is assisted by energy migration among donor ions. The large energy transfer efficiency (89%) indicates that the Yb3+/Tm3+ co-doped bismuth germanate glass is a good candidate for the 1.8μm laser. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 40
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 94151943
- Full Text :
- https://doi.org/10.1016/j.ceramint.2013.11.053