Thermal stability and heat capacity changes at the glass transition in K2O–WO3–TeO2 glasses

Kosuge, T.; Benino, Yasuhiko; Dimitrov, V.; Sato, Ryuji; Komatsu, Takayuki

doi:10.1016/s0022-3093(98)00800-x

Cited by 135 publications

(95 citation statements)

References 26 publications

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“…The value of the refractive index was taken as 2.17 and 2.16 for the glasses having 15 and 20 mol% and, 2.16 mol%, respectively [24]. Since the reduced matrix elements, U (t) , are not strongly host dependant we have used the values calculated by Kaminskii in LaF 3 [37].…”

Section: Optical Measurementsmentioning

confidence: 99%

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Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Özen

Aydınlı

Cenk

et al. 2003

Journal of Luminescence

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Effect of composition on the structure, spontaneous and stimulated emission probabilities of various 1.0 mol% Tm 2 O 3 doped (1Àx)TeO 2 +(x)WO 3 glasses were investigated using Raman spectroscopy, ultraviolet-visible-nearinfrared (UV/VIS/NIR) absorption and luminescence measurements.Absorption measurements in the UV/VIS/NIR region were used to determine spontaneous emission probabilities for the 4f-4f transitions of Tm 3+ ions. Six absorption bands corresponding to the absorption of the 1 G 4 , 3 F 2 , 3 F 3 and 3 F 4 , 3 H 5 and 3 H 4 levels from the 3 H 6 ground level were observed. Integrated absorption cross-section of each band except that of 3 H 5 level was found to vary with the glass composition. Luminescence spectra of the samples were measured upon 457.9 nm excitation. Three emission bands centered at 476 nm ( 1 G 4 -3 H 6 transition), 651 nm ( 1 G 4 -3 H 4 transition) and 800 nm ( 1 G 4 -3 H 5 transition) were observed. Spontaneous emission cross-sections together with the luminescence spectra measured upon 457.9 nm excitation were used to determine the stimulated emission cross-sections of these emissions.The effect of glass composition on the Judd-Ofelt parameters and therefore on the spontaneous and the stimulated emission cross-sections for the metastable levels of Tm 3+ ions were discussed in detail. The effect of temperature on the stimulated emission cross-sections for the emissions observed upon 457.9 nm excitation was also discussed. r

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Section: Optical Measurementsmentioning

confidence: 99%

“…It is known that, unlike SiO 2 glasses, addition of elements like WO 3 is needed to form TeO 2 -based bulk glasses [24]. Glass forming regions together with some physical and thermal properties of various TeO 2 -based glasses have been reported [25][26][27][28][29]33].…”

Section: Introductionmentioning

confidence: 99%

Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Özen

Aydınlı

Cenk

et al. 2003

Journal of Luminescence

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“…Among the numerous glass hosts, tellurite glass combines the attributes of wide transmission region, good corrosion resistance, low phonon energy, high refractive index and excellent rare earth ions solubility [1][2][3]. TeO 2 --based glasses are promising materials for use in non--linear optical devices due to their large third-order non--linear susceptibility [1,2] and for the development of fibre and integrated optic amplifiers as well as lasers covering all the main telecommunication bands because they are potential hosts for infrared (IR) emitting rare earth (RE) elements [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Rare Earth Ions on the Optical Properties of Tellurite Glass

et al. 2011

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The goal of this work was to investigate the influence of rare-earth ions such as Nd 3+ and Er 3+ on the optical properties of tellurite glass of the TeO2-WO3-PbO-La2O3 system. The optical studies of the glasses comprised spectrophotometry (reflectance and transmittance) and spectroscopic ellipsometry. The spectrophotometric measurements yield a number of narrow absorption bands which correspond to characteristic transitions between the ground-and consecutive excited states of rare-earth ions. From ellipsometric studies, in turn, the dispersion of the refraction coefficient has been obtained which appears to be practically the same for the tellurite glass matrix and the matrix doped with Nd 3+ and Er 3+ ions.

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“…Among numerous oxide glasses [3], tellurite glasses of the system TeO 2 -WO 3 -PbO, have unique optical and magnetooptical properties, resulting from big mass and polarizability of Pb 2+ ions. They characterize with high refractive index of about 2.0, as well as with absorption edge located at 6 µm [4]. High value of the refractive index of tellurite glasses allows using such materials in optical waveguides, where self-focusing effect is observed [5,6].…”

Section: Introductionmentioning

confidence: 99%

Influence of active admixtures onto tellurite glass refractive index

Reben¹,

Wasylak²,

Jaglarz³

2010

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The goal of this work was to investigate the influence of rare earth ions such as Tm 3+ , Yb 3+ on physico-chemical properies of tellurite glass from the TeO2-WO3-PbO-PbF2-Na2O system. The thermal characteristic of tellurite glass Tm 3+ , Yb 3+ doped have been presented. The effect of the glass crystallization on thermal stability of the glass and crystallizing phases formed upon heat treatment were investigated by DTA/DSC/, XRD methods. The spectral dependence of ellipsometric angles of the tellurite glass samples, have been studied. The influence of ions of rare earth elements, i.e. Tm 3+ and Yb 3+ , onto changes of refractive index of glass P1 (without RE admixture) were examined. The optical measurements were conducted on Woollam M2000 spectroscopic ellipsometer, in spectral range of 190-1700 nm.

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Thermal stability and heat capacity changes at the glass transition in K2O–WO3–TeO2 glasses

Cited by 135 publications

References 26 publications

Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Effect of composition on the spontaneous emission probabilities, stimulated emission cross-sections and local environment of Tm3+ in TeO2–WO3 glass

Influence of Rare Earth Ions on the Optical Properties of Tellurite Glass

Influence of active admixtures onto tellurite glass refractive index

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