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The glass transition temperature (T_g),crystallization onset temperature (T_x) and Raman scattering spectra of new tellurite glasses were studied as the function of glass composition.With the introduction of other metal oxides such as Nb_2O_5,BaO and WO_3,T_g temperature increases,the intensity of exothermal peaks decreases,and thermal stability of tellurite glass improves.It was found that more TeO_3 units transformed into TeO_4 units and non-bridging oxygen atoms decreased with the incorporating other metal oxides in glassy network,when the content of TeO_2 was fixed.Appearance of peak at 920 cm~(-1) broadens the Raman bandwidth of tellurite glasses,which is very useful realize high efficient broadband fiber Raman amplifiers.
The glass transition temperature (T_g), crystallization onset temperature (T_x) and Raman scattering spectra of new tellurite glasses were studied as the function of glass composition. By the introduction of other metal oxides such as Nb_2O_5, BaO and WO_3, T_g temperature increases, the intensity of exothermal peaks decreases, and the thermal stability of tellurite glass improves. It was found that more TeO_3 units transformed into TeO_4 units and non-bridging oxygen atoms decreased with the incorporating other metal oxides in glassy network, when the content of TeO 2 was fixed .Appearance of peak at 920 cm -1 (broadens the Raman bandwidth of tellurite glasses, which is very useful for realizing high efficient broadband fiber Raman amplifiers.