Thermo-optical characterization of tellurite glasses by thermal lens, thermal relaxation calorimetry and interferometric methods

Lima, S.M.; Falco, W. F.; Bannwart, E.S.; Andrade, L.H.C.; Oliveira, Roberta Camargos de; Moraes, João Carlos Silos; Yukimitu, K.; Araújo, E. B.; Falcão, E. A.; Steimacher, A.; Astrath, N. G. C.; Bento, A. C.; Medina, A. N.; Baesso, M. L.

doi:10.1016/j.jnoncrysol.2006.02.116

Cited by 30 publications

(18 citation statements)

References 20 publications

(38 reference statements)

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Section: Discussionsupporting

confidence: 51%

“…The K value is similar to that of the TeLiTi glass [25,26], about 43% of that for aluminosilicate glasses [27] and 50% more than the K for chalcogenide glass [18]. The D value is~17% higher than those for tellurite glasses with Titanium [25,26]. For many applications, it is desirable to have a material with large values for D and K in order to avoid the thermal loading during the excitation processes.…”

Section: Discussionmentioning

confidence: 71%

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Relation among optical, thermal and thermo-optical properties and niobium concentration in tellurite glasses

Moraes

Nardi

Sidel

et al. 2010

Journal of Non-Crystalline Solids

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In this work, optical, thermal, thermo-optical and spectroscopic properties of the 80TeO(2)-(20-x)Li(2)O-xNb(2)O(5) (x=5, 10 and 15 mol%) glasses were investigated by using the thermal lens spectrometry, X-Ray diffraction, Raman spectroscopy, modulated differential scanning calorimetry and Brewster angle method. The influence of Nb(2)O(5) in the glass structure was interpreted by the thermal diffusivity, specific heat, thermal conductivity, temperature coefficient of the optical path length, refractive index and band gap energy. The calculated optical basicity and polarizability allowed bettering understanding the obtained results, reinforcing the assumption on the glass structural change. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved

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Section: Discussionsupporting

confidence: 51%

Section: Discussionmentioning

confidence: 71%

Relation among optical, thermal and thermo-optical properties and niobium concentration in tellurite glasses

Moraes

Nardi

Sidel

et al. 2010

Journal of Non-Crystalline Solids

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“…, where in the setup used, ω oe = 38 ± 1 μm) was calculated to be (2.7 ± 0.1) 10 −3 cm 2 /s. This was in agreement with the value reported in the literature for 80Te-20Li glass [27].…”

Section: Resultssupporting

confidence: 93%

Observation of a Te4+ center with broad red emission band and high fluorescence quantum efficiency in TeO2-Li2O glass

Costa

Souza

Langaro

et al. 2018

Journal of Luminescence

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A B S T R A C TIn this work, a lithium tellurite glass (80TeO 2 − 20Li 2 O, in mol%) was synthesized and its optical properties were analyzed. This glass matrix has been extensively studied, mainly due to its highly nonlinear optical properties, but there have been no reports concerning its luminescence properties. To the best of our knowledge, this is the first observation of visible emission related to Te 4+ centers in a lithium tellurite glass. A broad and intense emission band was centered at 650 nm and there was a broad excitation band in the UV-Vis region. The emission lifetime at room temperature was approximately 7.0 ± 0.2 μs and the fluorescence quantum efficiency was 63 ± 6%. These characteristics indicated that the system consisting of Te 4+ centers in lithium tellurite glass is a good candidate as a phosphor material for various applications.

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“…%) 80TeO 2 -20Li 2 O and 80TeO 2 -15Li 2 O-5TiO 2 and with similar residual absorption than those corresponding to our samples ($1 cm À1 ), a small thermal lens effect was detected under cw Ar þ laser excitation with 81 mW at 514 nm. 31 The values of NL refractive index n 2 for the tellurite glasses were independent of the peak intensities available for the laser oscillator used in the TM Z-scan experiments. In order to study the nonlinear response at much higher intensities, we analyzed the samples using the standard Z-scan under fs pulses delivered by a Ti:sapphire regenerative amplifier.…”

Section: B Nonlinear Optical Propertiesmentioning

confidence: 96%

Third-order nonlinear optical response and photoluminescence characterization of tellurite glasses with different alkali metal oxides as network modifiers

Castro-Beltrán

Desirena

Ramos‐Ortíz

et al. 2011

Journal of Applied Physics

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Studies of the third-order nonlinear optical properties in TeO 2-MO-R 2 O glasses with three different alkali metal oxides R 2 O (R ¼ Li, Na, K) as network modifiers and two network intermediates MO (M ¼ Zn, Mg) are reported. The influence of such modifiers and intermediates on the nonlinear optical properties of these glasses was investigated using the standard Z-scan and the thermally managed Z-scan techniques under femtosecond pulse excitation at 800 nm. For different modifiers and intermediates, the nonlinear refraction indices n 2 of these glasses varied in the range 1.31-2.81 (Â10-15 cm 2 /W). It was found that n 2 increases as the ionic radius of both network modifiers and intermediates decreases. Furthermore, the measurements show that the contribution from thermo-optical effects to the nonlinear refraction index is negligible for all of the studied glass compositions. In addition, the effect of modifiers and intermediates in the formation of localized states in the vicinity of the optical bandgap was also studied through photoluminescence experiments. These experiments revealed the presence of two emission bands (red and blue) originating from these localized states that can be populated after optical excitation and subsequent relaxation.

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Thermo-optical characterization of tellurite glasses by thermal lens, thermal relaxation calorimetry and interferometric methods

Cited by 30 publications

References 20 publications

Relation among optical, thermal and thermo-optical properties and niobium concentration in tellurite glasses

Relation among optical, thermal and thermo-optical properties and niobium concentration in tellurite glasses

Observation of a Te4+ center with broad red emission band and high fluorescence quantum efficiency in TeO2-Li2O glass

Third-order nonlinear optical response and photoluminescence characterization of tellurite glasses with different alkali metal oxides as network modifiers

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