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
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.