Frequency upconversion emissions in layered lead–germanate–tellurite glasses for three-color display

This letter is aiming to develop a full-color glass for the three-dimensional and three-color display. The Yb 3+ /Tm 3+ /Er 3+ codoped lead–germanate–tellurite bulk glass has been fabricated and the upconversion emissions have been investigated. The reduced blue and green emission intensity suggests that it is difficult to achieve three-color display in the multiple-rare-earth ions doped glass. Then a two-layer lead–germanate–tellurite glass has been fabricated and the results show that the intensities of upconverted blue and green emissions remain same as emissions in the Yb 3+ /Tm 3+ and Yb 3+ /Er 3+ co-doped glasses.