Raman spectra of binary tellurite glasses containing tri- or tetra-valent cations

Sekiya, T.; Mochida, Norio; Soejima, Ayako

doi:10.1016/0022-3093(95)00290-1

Cited by 114 publications

(72 citation statements)

References 29 publications

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“…2). The data obtained are in complete agreement with the results in [6], where the structure and properties of binary glasses of the systems Ln 2 O 3 -TeO 2 and XO 2 -TeO 2 (X = Zr, Sn, Hf) were investigated. As Fig.…”

supporting

confidence: 85%

“…2, curve 2 ) is accompanied by separation of two phases -tetragonal TeO 2 and TiTe 3 O 8 with a cubic body-centered lattice. A similar phase composition was observed in [6] in crystallization of glass of the composition 5XO 2 × 95TeO 2 (X = Zr, Sn, Hf). This forms the basis for hypothesizing that a molar content of less than 5% Er 2 O 3 does not affect the character of crystallization of erbium-titanium-tellurite glasses.…”

supporting

confidence: 69%

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Structure and properties of erbium-titanium-tellurite glass

et al. 2006

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The structure of glasses of the compositions xEr 2 O 3 -2xTiO 2 -(100 -3x )TeO 2 was investigated and the glass formation region, situated in the range of 2 < x < 7 was established. The possibility of increasing the glass transition temperature and consequently the thermal stability of erbium tellurite glass by doping with titanium (IV) oxide was demonstrated.The number of publications on development and investigation of active media based on tellurite glasses has increased significantly in recent years. This is because TeO 2 glass has high refractive indexes (n > 2.0), high transparency, including in the near IR region of the spectrum (0.35 -6.00 mm) [1], the possibility of varying the compositions of the glass within wide limits, and higher solubility of the cations of rare-earth elements in comparison to quartz glass. The last two circumstances allow obtaining a much broader luminescence band of Er 3+ (about 80 nm) in fibers made of tellurite glass than with quartz fibers (about 35 nm) [1, 2], which is necessary for simultaneously enhancing some signals in current WDM (wavelength-division multiplexing) networks. For this reason, broad-band fiber amplifiers based on tellurite glass with Er 3+ dopants are now being actively developed [1 -3]. The main drawback of tellurite glass, which is related to the low glass transition temperature (about 290°C) and prevents it from being used in conditions of intensive radiation, can be partially eliminated by complicating the composition of the glass and doping with high-melting oxides, for example, WO 3 , Nb 2 O 5 , etc. [1 -3].For this reason, the system Er 2 O 3 -TiO 2 -TeO 2 (ETT) is of special interest. The high-melting oxides (Er 2 O 3 and TiO 2 ) in it makes the possibility of developing new laser glasses that have high thermal stability and chemical resistance in comparison to the investigated analogs of laser tellurite glasses very attractive. In addition, the possibility of separating active Er 2 Ti 2 O 7 crystals with the structure of pyrochlore and the fluorite-like phase Er 2 Te 5 O 13 , which has been studied very little, in the glasses of this system offers new prospects for developing glass ceramic materials with a high Er 3+ content (> 5´10 20 cm -3 ) and improved luminescence characteristics. Such materials are of great interest as the active elements of tunable and fiber lasers, laser microchips, and broadband signal amplifiers.However, almost nothing is known of glass formation in the ETT system. There is thus no information on the structure and crystallization of erbium-titanium-tellurite glasses and its effect on the luminescence-spectral properties.We synthesized and investigated glasses in which Er 2 O 3 : TiO 2 = 2, and the composition can be expressed by the general formula xEr 2 O 3 -2xTiO 2 -(100 -3x )TeO 2 . This ratio was selected for the purpose of subsequently fabricating glass ceramic materials containing Er 2 Ti 2 O 7 with the same Er 2 O 3 : TiO 2 ratio from these glasses.We found that transparent glasses in the xEr 2 O 3 -2xTiO 2 -(100 -3...

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confidence: 85%

supporting

confidence: 69%

Structure and properties of erbium-titanium-tellurite glass

et al. 2006

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“…It is worth to mention, based on Raman analysis, that erbium ions influence the Te-O local structure as oxide modifiers in binary or ternary tellurite-based glasses [47][48][49][50]. However, optical properties of active RE ions are not sharply affected by the structural changes induced by the increasing erbium content.…”

Section: Emission Spectra and Cross-section At 15 MMmentioning

confidence: 97%

Spectral broadening and luminescence quenching of 1.53μm emission in Er3+-doped zinc tellurite glass

Jaba

Mansour

Kanoun

et al. 2009

Journal of Luminescence

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“…It is noticed that there are almost equal contributions from the TeO 4 and TeO 3 structural units in our glass. The band F near 860 cm À1 could be attributed to the vibrational mode of Nb-O in the NbO 6 octahedra or Nb-O-Te linkage [16]. This is not observed normally in many tellurite glasses, which do not include Nb 2 O 5 in the glass composition.…”

Section: Raman Spectramentioning

confidence: 91%