Applied Physics B

, 91:437 | Cite as

Multicolor upconversion emission from Tm3++Ho3++Yb3+ codoped tellurite glass on NIR excitations



Multicolor emission has been produced using 798 nm and 980  nm laser excitation in a Tm3++Ho3++Yb3+ codoped tellurite based glass. This glass generates simultaneously red, green and blue (RGB) emission on 798 nm excitation. Multicolor emission thus obtained was tuned to white luminescence by adjusting the Ho3+ ion concentration. There is a close match between the calculated color coordinate for the white luminescence obtained here and the point of equal energy which represents white in the 1931 CIE chromaticity diagram. The 980 nm excitation of the same sample on the other hand gives intense green and red emission and the glass appears greenish.


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Laser and Spectroscopy LaboratoryDepartment of Physics BHUVaranasiIndia

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