Characterization of Tm3+ doped TNZL glass laser material

• DOI: 10.1016/j.jlumin.2014.12.069
• Publication Date: 2015-01-23T22:31:53Z
• Authors: R. Lachheb; K. Damak; A.A. Assadi; A. Herrmann; E. Yousef; C. Rüssel; R. Maâlej
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract In this paper, a new tellurite glass (85TeO 2 ·5.0Nb 2 O 5 ·5.0ZnO·5.0LiF) doped with 1 mol% Tm 2 O 3 was prepared by melt-quenching technique. Differential scanning calorimetry (DSC) measurements indicate a good thermal stability, X-ray diffraction patterns show no sign of crystallization. Precise refractive index measurements were performed on five different wavelengths by a prism spectrometer. The optical energy gap, the Sellmeier energy gap and the dispersion energy were estimated. Judd–Ofelt intensity parameters were evaluated in order to obtain electric and magnetic-dipole transition probabilities, branching ratios and radiative lifetimes of several excited states of Tm 3+ . The classical McCumber theory was used to evaluate the emission cross-sections for the 3 F 4 → 3 H 6 transition at a wavelength of around 1.8 µm. The characteristics of down-conversion luminescence in the visible range were studied by exciting Tm 3+ ions into the 1 G 4 level. Furthermore the structure of this glass was analyzed by Raman spectroscopy.