Borogermanate glasses with a high terbium oxide content

Savinkov, V. I.; Сигаев, В. Н.; Golubev, N. V.; Саркисов, П. Д.; Masalov, A. V.; Sergeev, A. P.

doi:10.1016/j.jnoncrysol.2010.06.011

Cited by 49 publications

(26 citation statements)

References 18 publications

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“…1a and 1b). For similar Tb 3+ ion concentration, the absolute value V B of GBAG- x Tb glasses is in the order of that of other reported record values in Tb 3+ -doped MO glasses, e.g, silicate26, phosphate2, borate522 and borogermanate23 glasses (Fig. 1b).…”

Section: Resultssupporting

confidence: 73%

“…For the maximum Tb 3+ loading we report here, GBAG-25Tb, V B exceeds the rotation efficiency in most of the well-known MO glasses, e.g. , 30Tb 2 O 3 -70B 2 O 3 (~103 rad/T/m)22 and 25Tb 2 O 3 -15Al 2 O 3 -60SiO 2 (~102 rad/T/m)6, and is similar with that of 33Tb 2 O 3 -25GeO 2 -25B 2 O 3 -5SiO 2 -12Al 2 O 3 (~119 rad/T/m)23. For comparison, data for the single crystalline benchmarks of TAG and TGG are also shown in Fig.…”

Section: Resultssupporting

confidence: 66%

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Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Gao

Winterstein-Beckmann

Surzhenko

et al. 2015

Sci Rep

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We report on the magneto-optical (MO) properties of heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses towards fiber-integrated paramagnetic MO devices. For a Tb3+ ion concentration of up to 9.7 × 1021 cm−3, the reported glass exhibits an absolute negative Faraday rotation of ~120 rad/T/m at 632.8 nm. The optimum spectral ratio between Verdet constant and light transmittance over the spectral window of 400–1500 nm is found for a Tb3+ concentration of ~6.5 × 1021 cm−3. For this glass, the crystallization stability, expressed as the difference between glass transition temperature and onset temperature of melt crystallization exceeds 100 K, which is a prerequisite for fiber drawing. In addition, a high activation energy of crystallization is achieved at this composition. Optical absorption occurs in the NUV and blue spectral region, accompanied by Tb3+ photoluminescence. In the heavily doped materials, a UV/blue-to-green photo-conversion gain of ~43% is achieved. The lifetime of photoluminescence is ~2.2 ms at a stimulated emission cross-section σem of ~1.1 × 10−21 cm2 for ~ 5.0 × 1021 cm−3 Tb3+. This results in an optical gain parameter σem*τ of ~2.5 × 10−24 cm2s, what could be of interest for implementation of a Tb3+ fiber laser.

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Section: Resultssupporting

confidence: 73%

Section: Resultssupporting

confidence: 66%

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Gao

Winterstein-Beckmann

Surzhenko

et al. 2015

Sci Rep

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“…Specific issues are the stabilization of rare-earth ions (REs) in the required valence state and their incorporation in high concentrations, in order to improve the transfer efficiency of excitations from the matrix. This problem may be solved by a few approaches during glasses production: i) to employ of special chemicals (for example SiC [13], (C6H10O5)n [14], that work as reducing agents); ii) to modify of the glass composition obtaining multicomponent glasses [15,16]; iii) to control the synthesis conditions (reducing or inert atmosphere) [17][18][19]. The above listed approaches allow to stabilize the RE predominantly in the required valence state and with concentrations as high as 33 mol %.…”

Section: Introductionmentioning

confidence: 99%

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Tratsiak

Korjik

Fedorov

et al. 2018

Journal of Alloys and Compounds

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Binary alkali-earth silicate glasses doped with Ce 3+ , Tb 3+ , and Dy 3+ were obtained by meltquenching technique and their photo-and radio-luminescence properties were investigated. The disordered structure of the glass is responsible for an inhomogeneous broadening of the electronic radiative 5d 1 energy level of Ce 3+ due to their localization in several positions with different surroundings, possessing a slightly different local ligand field. The influence of glass matrix composition on the Stokes shift as a function of ionic radius of the cation was shown. The radioluminescence spectral shapes were related to the simultaneous occurrence of emissions from all Ce 3+ configurations with relative weights proportional to their abundance in the glasses. The possibility of excitation of Ce 3+ in different localizations was demonstrated and confirmed by the systematic shift of emission from excitation. On the contrary, no shift was observed in the Tb 3+ and Dy 3+ doped glasses, thanks to the lower effect of ligand field on their radiative electronic levels.

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“…It is well‐known that silicon and germanium elements belong to group IVA in the periodic table. Hence, borogermanate glass with concentrated rare‐earth oxides (usually La 2 O 3 ) is becoming an attractive material in view of its outstanding luminescent, ferroelectric, and magneto‐optic properties . In comparison with conventional silicate or borosilicate glass, borogermanate glass exhibits the following prominent advantages: (1) Larger solution capacity for rare‐earth oxides of B 2 O 3 , (2) Lower phonon energy and higher density of germanate host, and (3) Lower melting temperature of glass synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, borogermanate glass with concentrated rare-earth oxides (usually La 2 O 3 ) is becoming an attractive material in view of its outstanding luminescent, 19 ferroelectric, 20 and magneto-optic properties. 21 In comparison with conventional silicate or borosilicate glass, borogermanate glass exhibits the following prominent advantages: (1) Larger solution capacity for rareearth oxides of B 2 O 3 , (2) Lower phonon energy and higher density of germanate host, and (3) Lower melting temperature of glass synthesis. These remarkable advantages stimulate us to design and develop a novel borogermanate glass with a high Gd 2 O 3 content for potential scintillating application.…”

Section: Introductionmentioning

confidence: 99%

Eu³⁺‐Activated Borogermanate Scintillating Glass with a High Gd₂O₃ Content

et al. 2013

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Eu3+‐activated borogermanate scintillating glasses with compositions of 25B2O3–40GeO2–25Gd2O3–(10−x)La2O3–xEu2O3 were prepared by melt‐quenching method. Their optical properties were studied by transmittance, photoluminescence, Fourier transform infrared (FTIR), Raman and X‐ray excited luminescence (XEL) spectra in detail. The results suggest that the role of Gd2O3 is of significance for designing dense glass. Furthermore, energy‐transfer efficiency from Gd3+ to Eu3+ ions can be near 100% when the content of Eu2O3 exceeds x = 4, the corresponding critical distance for Gd3+–Eu3+ ion pairs is estimated to be 4.57 Å. The strongest emission intensities of Eu3+ ions under both 276 and 394 nm excitation are simultaneously at the content of 8 mol% Eu2O3. The degree of Eu–O covalency and the local environment of Eu3+ ions are evaluated by the value of Ωt parameters from Judd–Ofelt analysis. The calculated results imply that the covalency of Eu–O bond increases with the increasing concentration of Eu3+ ions in the investigated borogermanate glass. As a potential scintillating application, the strongest XEL intensity under X‐ray excitation is found to be in the case of 6 mol% Eu2O3, which is slightly different from the photoluminescence results. The possible reason may be attributed to the discrepancy of the excitation mechanism between the ultraviolet and X‐ray energy.

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Borogermanate glasses with a high terbium oxide content

Cited by 49 publications

References 18 publications

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Eu³⁺‐Activated Borogermanate Scintillating Glass with a High Gd₂O₃ Content

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Borogermanate glasses with a high terbium oxide content

Cited by 49 publications

References 18 publications

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Eu3+‐Activated Borogermanate Scintillating Glass with a High Gd2O3 Content

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Product

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Eu³⁺‐Activated Borogermanate Scintillating Glass with a High Gd₂O₃ Content