Author/Authors :
BAKI, S.O. Universiti Putra Malaysia - Centre of Foundation Studies for Agriculture Science, Malaysia , TAN, L.S. Aseptec Sdn. Bhd., Malaysia , KAN, C.S. Aseptec Sdn. Bhd., Malaysia , KAMARI, H.M. Universiti Putra Malaysia - Faculty of Science - Department of Physics, Malaysia , NOOR, A.S.M. Universiti Putra Malaysia - Faculty of Engineering, Wireless and Photonic Networks Research Center, Malaysia , MAHDI, M.A. Universiti Putra Malaysia - Faculty of Engineering, Wireless and Photonic Networks Research Center, Malaysia
Abstract :
Multicomposition of Er^3+-Yb^3+ codoped tellurite oxide, TeO2-ZnO-PbO-TiO2-Na2O glass has been investigated. A detailed spectroscopic study of the Judd-Ofelt analysis has been performed from the measured absorption spectrum in order to obtain the intensity parameters Ωt (t=2, 4, 6). The calculated Ωt values were then utilized in the determination of transition probabilities, radiative lifetimes and branching ratios of the Er^3+ transitions between the J(upper)-J’(lower) manifolds. Both visible upconversion and near-infrared spectra were characterized under the 980 nm laser diode excitation at room temperature.
Keywords :
Judd , Ofelt analysis , tellurite oxide glas , upconversion
