Abstract
A series of Er3+/Yb3+ co-doped Sb2O3-WO3-Li2O glasses were prepared. Intense green upconversion fluorescence was observed near 524 and 544nm under excitation at 980 nm. The upconversion process was proved to be a two-photon absorption process. The upconversion fluorescence efficiency was enhanced by increasing introduction concentration of Yb3+ ions. The low maximum phonon energy of the glasses indicated that the glasses were good potential for upconversion optical devices.
Highlights
With the increasing requirement for laser diode (LD), magneto-optical disk and optical media, more and more attention has been focused on searching for luminescence materials with high upconversion efficiency [1,2,3]
The antimonate glasses are more stable against the pumping light, possess high refractive index and are transparent up to the far infrared wavelengths which makes them suitable for hosting the rare earth ions to give out high luminescence efficiency in the visible and NIR regions [7,8,9,10]
The purpose of this paper is to develop a new antimony glass with low phonon energy, and understanding of the upconversion behavior in this glassy host for predicting its potential laser properties
Summary
With the increasing requirement for laser diode (LD), magneto-optical disk and optical media, more and more attention has been focused on searching for luminescence materials with high upconversion efficiency [1,2,3]. Though fluoride glasses have been studied because of their low phonon energies, oxide glasses are more appropriate for practical applications due to their high chemical durability and thermal stability. Tellurite and antimonate glasses are of growing interest due to their relative low phonon energy, high refractive index, good corrosion resistance, thermal and chemical stability. The antimonate glasses are more stable against the pumping light, possess high refractive index and are transparent up to the far infrared wavelengths which makes them suitable for hosting the rare earth ions to give out high luminescence efficiency in the visible and NIR regions [7,8,9,10]
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