doi: 10.17586/2226-1494-2016-16-5-809-815


I. M. Sevastianova, Y. K. Fedorov, K. S. Moskaleva, V. A. Aseev

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For citation: Sevastianova I.M., Fedorov Yu.K., Moskaleva K.S., Aseev V.A. Structure features of the sodium-germanate glasses doped with ytterbium erbium retrieved from Raman spectroscopy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 5, pp. 809–815. doi: 10.17586/2226-1494-2016-16-5-809-815


Subject of Research.The paper deals with study of Raman spectra and luminescence spectra in the visible region of the sodium-germanate glass: 49 GeO2 – 13 Na2O – 27 Yb2O3 – 11 La2O3 - 0,25 Er2Oand presents research results. In addition, this glass is doped with 5 mol% of the following components MgO, BaO, Al2O3, PbO, Nb2O5, TiO2, SiO2, P2O5 in order to study the effect of these additives on the structure of the glassy matrix and the anti-Stokes luminescence spectra of erbium ions. Method. Raman scatteringspectra were recorded by Renishaw inVia Raman Microscope. Excitation source is a helium neon laser (λ= 633 nm) with power equal to 50Wt. Anti-Stokes luminescence of erbium ions was registered in spectral region of 450–750 nm at room temperature (excitation laser wavelength is 975 nm, power is 1Wt). Main Results. It was shown that the structure of the initial glass does not change with the introduction of niobium as Nb2O5 in any coordination plays a role of network forming, building a single mixed grid with tetrahedrons [GeO4]. Introduction of the second glass former P2O5 leads to loosening germanate structure due to the appearance of the phosphate sublattice. This leads to a redistribution of the relative intensity of up-conversion luminescence bands with maxima at 540 and 670 nm compared with the initial glass. Introduction of additives PbO, MgO, Al2O3, TiO2 results in a multicenter structure. In case of titanium oxide addition it leads to a change in the relative intensities of the erbium luminescence. 

Keywords: germanate glasses, Raman scattering, erbium, anti-Stokes luminescence, luminescence

Acknowledgements. The research was carried out under a grant of the Russian Science Foundation (project No14-23-00136)


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