We study the upconversion properties of Ta2O5 and Nb2O5 based TeO2 glasses doped with 0.5 mol% Er2O3 after excitation into the I-4(11/2) level using 980 nm radiation. Green and red emission is observed originating from the (H-2(11/2), S-4(3/2)) and F-4(9/2) states, respectively. Excited state absorption and energy transfer are discussed as possible mechanisms for the upconversion.
Compositional effect on the upconversion of Ta2O5 and Nb2O5 based tellurite glasses
SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni
2003-01-01
Abstract
We study the upconversion properties of Ta2O5 and Nb2O5 based TeO2 glasses doped with 0.5 mol% Er2O3 after excitation into the I-4(11/2) level using 980 nm radiation. Green and red emission is observed originating from the (H-2(11/2), S-4(3/2)) and F-4(9/2) states, respectively. Excited state absorption and energy transfer are discussed as possible mechanisms for the upconversion.
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