ThuliumV1, Main, Exploration, bibRecord, 002042

Thermal properties and optical transition probabilities of Tm3+ doped TeO2–WO3 glass

Identifieur interne : 002042 ( Main/Exploration ); précédent : 002041; suivant : 002043

Thermal properties and optical transition probabilities of Tm3+ doped TeO2–WO3 glass

Auteurs : S. Cenk [Turquie] ; B. Demirata [Turquie] ; M. L Öveçoglu [Turquie] ; G. Özen [Turquie]

Source :

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [ 1386-1425 ] ; 2001.

RBID : ISTEX:3C2163A74F84DAE340BB62F0B353D6434F39106B

Descripteurs français

KwdFr :
- Analyse thermique différentielle, Composés du tungstène (), Modèles chimiques, Spectrophotométrie IR, Tellure (), Thulium (), Verre ().
MESH :
- Analyse thermique différentielle, Composés du tungstène, Modèles chimiques, Spectrophotométrie IR, Tellure, Thulium, Verre.

English descriptors

Abstract

Abstract: Glasses with the composition of (1−x)TeO2+(x)WO3, where x=0.15, 0.25 and 0.3 were prepared and, their thermal and absorption measurements were carried out. Differential thermal analysis (DTA) curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while crystallization was not observed for the glasses containing a WO3 content of more than 15 mol%. All the glasses were found to be moisture-resistant. The absorption bands corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of the Tm3+ ion were observed in the optical absorption spectra. Integrated absorption cross-sections of each band except that of 3H5 level was found to vary with the glass composition. Judd–Ofelt analysis was carried out for the samples doped with 1.0 mol% Tm2O3. The Ω2 parameter shows the strongest dependence on the host composition and it increases with the increasing WO3 amount. The value of Ω4 increases rather slowly while the value of Ω6 is practically independent of the composition. The strong dependence of the parameter Ω2 indicates that this parameter is related to the structural change and the symmetry of the local environment of the Tm3+ ions in this glass.

Url:

https://api.istex.fr/document/3C2163A74F84DAE340BB62F0B353D6434F39106B/fulltext/pdf

DOI: 10.1016/S1386-1425(01)00444-9

Affiliations:

Turquie

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<term>Laser</term>
<term>Local environment</term>
<term>Luminescence</term>
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<term>Matrix elements</term>
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<term>Ofelt intensity parameters</term>
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<front><div type="abstract" xml:lang="en">Abstract: Glasses with the composition of (1−x)TeO2+(x)WO3, where x=0.15, 0.25 and 0.3 were prepared and, their thermal and absorption measurements were carried out. Differential thermal analysis (DTA) curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while crystallization was not observed for the glasses containing a WO3 content of more than 15 mol%. All the glasses were found to be moisture-resistant. The absorption bands corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of the Tm3+ ion were observed in the optical absorption spectra. Integrated absorption cross-sections of each band except that of 3H5 level was found to vary with the glass composition. Judd–Ofelt analysis was carried out for the samples doped with 1.0 mol% Tm2O3. The Ω2 parameter shows the strongest dependence on the host composition and it increases with the increasing WO3 amount. The value of Ω4 increases rather slowly while the value of Ω6 is practically independent of the composition. The strong dependence of the parameter Ω2 indicates that this parameter is related to the structural change and the symmetry of the local environment of the Tm3+ ions in this glass.</div>
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Thermal properties and optical transition probabilities of Tm3+ doped TeO2–WO3 glass

Thermal properties and optical transition probabilities of Tm3+ doped TeO2–WO3 glass

Source :

Descripteurs français

English descriptors

Abstract

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