Upconversion properties of Er3+/Yb3+ co-doped TeO2--Nb2O2--Li2O glasses
Su Fang-Ning (苏方宁), Deng Zai-De (邓再德)
Institute of Optical Communication Materials, College of Materials Science and Engineering, South China University of Technology,Guangzhou 510640, China
Abstract The Er3+/Yb3+ co-doped TeO2--Nb2O5--Li2O glass is prepared by conventional melting method, and its upconversion spectra are measured. The intense green upconversion luminescence upon excitation with a 976nm laser diode is observed with the naked eyes. The dependence of luminescence intensity on the ratio of Yb3+/Er3+ is discussed in detail, and the relationship between the ratio of green luminescence intensity to red luminescence intensity and the ratio of Yb3+/Er3+ is also studied. The luminescence intensity increases with the ratio of Yb3+/Er3+ increasing. The ratio of Yb3+/Er3+ plays a more important role than the concentration of Er3+ in determining the upconversion luminescence intensity. The ratio of green luminescence intensity to red luminescence intensity reaches a maximum when ratio of Yb3+/Er3+ is 3. Thus the glass could be one of the potential candidates for LD pumping solid-state lasers.
Received: 09 November 2005
Revised: 23 February 2006
Accepted manuscript online:
PACS:
78.55.Qr
(Amorphous materials; glasses and other disordered solids)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60307004) and the Science and Technology Program of Guangzhou, Guangdong province, China (Grant No 2004Z2-D0131).
Cite this article:
Su Fang-Ning (苏方宁), Deng Zai-De (邓再德) Upconversion properties of Er3+/Yb3+ co-doped TeO2--Nb2O2--Li2O glasses 2006 Chinese Physics 15 1096
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