Tellurite glass

The choice of a material for LSC depends obviously on the optical efficiency which in the case of rare earth ions may be obtained from the calculated absorption and fluorescence efficiency. An efficiency of 12% for Nd doped tellurite glass has been observed [126]. 

Sodium Borate, Germanate and Tellurite Glasses and Melts... 

Figure 7.8. A. two-dimensional DAS spectrum of glassy Na2Te409 acquired at a magnetic field of 8.46 T at spinning speeds of 5.5-6.0 kHz and rotor angles of 37.38° and 79.19° to the magnetic field. The maximum of the peak projection onto the isotropic shift axis is taken as the most probable isotropic shift. Note that the shifts are referenced to solid NaCl. B. Variation with glass composition of the most probable isotropic chemical shifts at two magnetic fields deduced from the DAS spectra of sodium tellurite glasses (referenced to solid NaCI). From Tagg et al.

Solid-state Al NMR studies have been carried out of the aluminium coordination environments in TaAl tellurite glasses containing from 60 to 95 cation-% Xe02. These data show the presence of 4-, 5- and 6-coordinate aluminium in all glasses. ... 

In the various tellurite glasses where the multiphonon relaxation is much smaller30 one can also observe emission from the 3Po and 3Pi levels (Table 2) with the corresponding assignments and wave-lengths ... 

Table 2. Radiative transition probabilities, branching ratios and integrated cross-sections for stimulated emission of the 3P, 3P0 and D2 excited states of Pr3+ in tellurite glasses... 

Fig. 6. The emission spectra of trivalent neodymium and ytterbium (alone, or mixed) in germanate and tellurite glasses at room temperature. It is noted that the two emission bands of neodymium almost disappear, when energy is transferred to the luminescent ytterbium. The Figure is reproduced with permission of Chemical Physics Letters211...

PHOTOLUMINESCENCE OF Er IONS IN OPAL/TELLURITE GLASS COMPOSITE NANOSTRUCTURES... 

Composite nanostructures consisting of an opal matrix containing tellurite glass doped with Er ions have been synthesized and photoluminescence of Er embedded in these structures in comparison with tellurite glass has been examined. A noticeable enhancement of luminescence in opal matrix as compared to glass has been observed. Possible enhancement mechanisms are discussed. 

Photoluminescence spectra of Er ions in an opal-based matrix containing tellurite glass and in a reference glass sample deposited on a silica substrate are presented in Fig. 2. A considerable enhancement of emission in the opal-based matrix as compared to the reference sample is evident and indicative of the promising approach performed in this study for synthesis of efficient erbium based optoelectronic components. 

El-Mallawany RAH (2002) Tellurite glasses handbook physical properties and data. CRC, Boca... 

S. Neov, I. Gerasimova, P. Mikula In Neutron Diffraction Investigation of the Short-Range Atomic Order in Tellurite Glasses, Proceedings of an International Conference on Advanced Methods in X-Ray and Neutron Structure Analysis of Materials, Czechoslovakia (1987). 

Kumar K, Rai SB. UV/visible upconversion and energy transfer between Nd " " and Pr ions in co-doped tellurite glass. Solid State Commun 2007 142(l-2) 58. 

F. T. Wallenberger, N. E. Weston and S. D. Brown, Infrared optical tellurite glass fibers. Journal of Non-Crystalline Solids. 144 [1], 107-110 (1992). 

Gelikbilek, M., Ersundu, A.E., Solak, N. Aydin, S. (2010). Kinetic studies on the tungsten tellurite glasses, ACerS 112th Annual Meeting combined with Materials Science Technology 2010 Conference Exhibition, Houston, Texas, U.S.A., October 2010... 

Yamane, M. Ashara, Y. (2000). Glasses for photonics, Cambridge University Press, ISBN 0-511-03862-3, Cambridge, New York, Port Melbourne, Madrid, Cape Town Yinnon, H. Uhlmann, D.R. (1983). Applications of thermoanalytical techniques to the study of crystallization kinetics in glass-forming liquids. Part I Theory. Journal of Non-Crystalline Solids, 54, pp. 253-275,0022-3093 Yukimitu, K, Oliveira, R.C., Araujo, E.B., Moraes, J.C.S. Avanci, L.H. (2005). DSC studies on crystallization mechanisms of tellurite glasses. Thermochimka Acta, 426, pp. 157-161,0040-6031... 

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