ThuliumV1, Main, Exploration, bibRecord, 002043

Thermal and optical properties of Tm3+ doped tellurite glasses

Identifieur interne : 002043 ( Main/Exploration ); précédent : 002042; suivant : 002044

Thermal and optical properties of Tm3+ doped tellurite glasses

Auteurs : G. Özen [Turquie] ; B. Demirata [Turquie] ; M. L. Öveço Lu [Turquie] ; A. Genç [Turquie]

Source :

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

RBID : ISTEX:2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1

Descripteurs français

KwdFr :
- Analyse thermique différentielle, Chlorure de lithium (), Cristallisation, Optique et photonique, Spectrophotométrie UV, Tellure (), Thulium (), Verre.
MESH :
- Analyse thermique différentielle, Chlorure de lithium, Cristallisation, Optique et photonique, Spectrophotométrie UV, Tellure, Thulium, Verre.

English descriptors

Abstract

Abstract: Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. 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 melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.

Url:

https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/fulltext/pdf

DOI: 10.1016/S1386-1425(00)00392-9

Affiliations:

Turquie

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<term>Crystallization</term>
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<term>Ground state</term>
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<term>Heating rate</term>
<term>Infrared region</term>
<term>Infrared wavelength region</term>
<term>Laser hosts</term>
<term>Licl</term>
<term>Licl content</term>
<term>Lithium Chloride (chemistry)</term>
<term>Matrix elements</term>
<term>Metastable levels</term>
<term>Molar ratio</term>
<term>Optical and thermal properties</term>
<term>Optical properties</term>
<term>Optics and Photonics</term>
<term>Oscillator</term>
<term>Oscillator strength</term>
<term>Oscillator strengths</term>
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<term>Tellurite glasses</term>
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<term>Crystallization temperatures</term>
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<term>Exothermic peak</term>
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<term>Glass transition</term>
<term>Glass transition temperature</term>
<term>Ground level</term>
<term>Ground state</term>
<term>Ground state absorption bands</term>
<term>Heating rate</term>
<term>Infrared region</term>
<term>Infrared wavelength region</term>
<term>Laser hosts</term>
<term>Licl</term>
<term>Licl content</term>
<term>Matrix elements</term>
<term>Metastable levels</term>
<term>Molar ratio</term>
<term>Optical properties</term>
<term>Optics and Photonics</term>
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<term>Spectrochimica acta part</term>
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<term>Tellurite glasses</term>
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<term>Thermal properties</term>
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<term>Cristallisation</term>
<term>Optique et photonique</term>
<term>Spectrophotométrie UV</term>
<term>Tellure</term>
<term>Thulium</term>
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<front><div type="abstract" xml:lang="en">Abstract: Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. 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 melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.</div>
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Thermal and optical properties of Tm3+ doped tellurite glasses

Thermal and optical properties of Tm3+ doped tellurite glasses

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Descripteurs français

English descriptors

Abstract

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