Multi-Rare-Earth Ions Codoped Tellurite Glasses for Potential Dual Wavelength Fibre-Optic Amplifiers

2002 ◽  
Vol 20 (1) ◽  
pp. 130-132 ◽  
Author(s):  
Dai Shi-Xun ◽  
Yang Jian-Hu ◽  
Xu Shi-Qing ◽  
Dai Neng-Li ◽  
Wen Lei ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Dual Wavelength ◽  
Tellurite Glasses ◽  
Fibre Optic

scholarly journals Vibrational, Thermal, and Physical Characterizations of Some Zinc Niobo Tellurite Glasses Doped with Rare Earth (Eu, Dy)-=SUP=-*-=/SUP=-

2021 ◽  
Vol 129 (4) ◽  
pp. 527
Author(s):  
Afrash Ejigu A ◽  
K.P. Ramesh ◽  
Gajanan Honnavar
Keyword(s):  
Rare Earth ◽  
Packing Density ◽  
Local Environment ◽  
Peak Shift ◽  
Rare Earth Ions ◽  
Physical Parameters ◽  
Tellurite Glasses ◽  
Rare Earth Ion ◽  
Raman Spectroscopic ◽  
Doped Glasses

In this communication, we report physical and thermal properties along with Raman spectroscopic investigations on Zinc Niobo Tellurite glass systems doped with Eu2O3 and Dy2O3 at the expense of TeO2. The glasses have been synthesized by the melt quenching technique. Physical parameters like density, molar volume, packing density were estimated. The density of the un-doped glasses increases with increasing mol% of the modifier (ZnO) whereas the glass transition temperature (Tg) decreases. We have observed an increase in the density of the base glass systems which are doped with rare earth (RE) dopants. The packing density of the un-doped glasses remains almost constant with increasing modifier content suggesting that there is not much change in the local environment. Raman spectra were recorded at room temperature and assigned to TeO4 and TeO3 structural units in these glasses. The peak shift, full width at half maximum (FWHM) of the de-convoluted Raman peaks were analyzed to get information about the local environment. It is observed that these compositions of tellurite glasses are good host materials for rare earth ions as they offer voids in the network. Further, it was observed that the rare earth ion doping has not affected the local environment of the glasses; Dy3+ ions have a slightly higher tendency to polarize Te-O bonds than the Eu3+ ions. Keywords: Niobium-based tellurite glasses, XRD, DSC, FTIR.

Infrared to visible upconversion emission in Nb2O5 modified tellurite glasses triply doped with rare earth ions

2019 ◽  
Vol 6 (8) ◽  
pp. 085203 ◽  
Author(s):  
Gökhan Bilir ◽  
Hüseyin Ertap ◽  
Lidong Ma ◽  
Baldassare Di Bartolo
Keyword(s):  
Rare Earth ◽  
Upconversion Emission ◽  
Rare Earth Ions ◽  
Tellurite Glasses

The Effect of Nd3+ Composition on Judd-Ofelt Analysis of Lithium Niobate Tellurite Glasses Codoped with Er3+

2017 ◽  
Vol 268 ◽  
pp. 191-197 ◽  
Author(s):  
Nurhafizah Hasim ◽  
Md Supar Rohani
Keyword(s):  
Rare Earth ◽  
Glass Network ◽  
Rare Earth Ions ◽  
Oscillator Strengths ◽  
Tellurite Glasses ◽  
Melt Quenching ◽  
Intensity Parameters ◽  
Doped Glasses ◽  
Rare Earth Doped ◽  
Covalent Nature

The modification of absorption characteristics in rare-earth doped tellurite glasses is important in photonics application. The Er3+/Nd3+ doped glasses of the form (69-x)TeO2–15Li2CO3–15Nb2O5–1Er2O3 -(x)Nd2O3 with x =0.2 and 0.6 mol% are successfully made by using conventional melt-quenching technique. The Judd-Ofelt analysis is to determine the local structure and bonding in the vicinity of rare-earth ions. The oscillator strengths are calculated from the absorption spectra and used to evaluate Judd-Ofelt intensity parameters (Ωλ, λ=2, 4 and 6). The values of Ω4 and Ω6 change with the increase of Nd3+ concentration is ascribed to the change in glass network structures. The values of Ω2 are increased from 1.53 to 37.13 (10-22) cm2 with the increase of Nd3+ concentration which indicate an increase in the covalent nature of Nd-O bond and less centrosymmetrical the ion sites. The decrease in τrad for each level with the increase of Nd3+ concentration signifies on how fast a particular level gets depopulated. The values of β for the transitions 4G5/2, 2G7/2 → 4I9/2, 2H11/2 → 4I9/2 and 4F9/2 → 4I9/2 are found to lie in between 99.6 to 100.0%.

scholarly journals Enhanced Optical Properties of Germanate and Tellurite Glasses Containing Metal or Semiconductor Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Cid Bartolomeu de Araujo ◽  
Diego Silvério da Silva ◽  
Thiago Alexandre Alves de Assumpção ◽  
Luciana Reyes Pires Kassab ◽  
Davinson Mariano da Silva
Keyword(s):  
Optical Properties ◽  
Energy Transfer ◽  
Rare Earth ◽  
Semiconductor Nanoparticles ◽  
Rare Earth Ions ◽  
Tellurite Glasses ◽  
All Optical ◽  
Gold Nps ◽  
Anti Stokes ◽  
The Rare Earth

Germanium- and tellurium-based glasses have been largely studied due to their recognized potential for photonics. In this paper, we review our recent studies that include the investigation of the Stokes and anti-Stokes photoluminescence (PL) in different glass systems containing metallic and semiconductor nanoparticles (NPs). In the case of the samples with metallic NPs, the enhanced PL was attributed to the increased local field on the rare-earth ions located in the proximity of the NPs and/or the energy transfer from the metallic NPs to the rare-earth ions. For the glasses containing silicon NPs, the PL enhancement was mainly due to the energy transfer from the NPs to the Er3+ions. The nonlinear (NL) optical properties of PbO-GeO2films containing gold NPs were also investigated. The experiments in the pico- and subpicosecond regimes revealed enhanced values of the NL refractive indices and large NL absorption coefficients in comparison with the films without gold NPs. The reported experiments demonstrate that germanate and tellurite glasses, having appropriate rare-earth ions doping and NPs concentration, are strong candidates for PL-based devices, all-optical switches, and optical limiting.

Multiphonon relaxation of rare earth ions in borate, phosphate, germanate and tellurite glasses

1975 ◽  
Vol 10 (3) ◽  
pp. 193-204 ◽  
Author(s):  
R. Reisfeld ◽  
L. Boehm ◽  
Y. Eckstein ◽  
N. Lieblich
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Tellurite Glasses ◽  
Multiphonon Relaxation

Photothermal spectroscopic characterization in tellurite glasses codoped with rare-earth ions

2006 ◽  
Author(s):  
Viviane Pilla ◽  
Enver F. Chillcce ◽  
Eugenio Rodriguez ◽  
Thomaz Catunda ◽  
Egberto Munin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Spectroscopic Characterization ◽  
Rare Earth Ions ◽  
Tellurite Glasses

scholarly journals A Review on Physical and Optical Properties of Zinc Tellurite Glasses Co-doped with different rare earth ions

2021 ◽  
Vol 33 (6) ◽  
pp. 48-56
Author(s):  
SUKHDEV BAIRAGI ◽  
◽  
GHIZAL F. ANSAR ◽  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Rare Earth Ions ◽  
Optical Data ◽  
Tellurite Glasses ◽  
X Ray Diffraction ◽  
Fibre Amplifier ◽  
Co Doped

In this work we review the effect of physical and optical properties with different ion zinc contents of tellurite base glass. The physical properties of the glasses were evaluated and the change in density, molar volume and ionic packing density in these glasses indicates the effect of ZnO different content show on the glasses structure. The study of optical properties such as the optical band gap and refractive index of zinc tellurite glass were studied. Zinc Tellurite glasses doped with Er3+ ions were synthesized by varies researcher. The glasses were characterized by X- ray diffraction, optical absorption and photoluminescence spectra. The glassy nature of zinc Tellurite host glass has been confirmed through XRD measurements. The glasses doped or co-doped with rare-earth ions have generated much interest due to the possibility of several promising applications such as optical data storage, visible laser, fibre amplifier, optical communication and sensor devices

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