scholarly journals Thermal, Optical, and IR-Emission Properties of Extremely Low Hydroxyl TeO2-WO3-Bi2O3-La2O3-xEr2O3 Glasses for Mid-Infrared Photonics

Photonics ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 320
Author(s):  
Vitaly V. Dorofeev ◽  
Vasily V. Koltashev ◽  
Sergei E. Motorin ◽  
Alexander D. Plekhovich ◽  
Arkady V. Kim
Keyword(s):  
Lanthanum Oxide ◽  
Tellurite Glass ◽  
Hydroxyl Groups ◽  
Erbium Oxide ◽  
Absorption Bands ◽  
Mid Infrared ◽  
Glass Transition Temperatures ◽  
Erbium Ions ◽  
Concentration Dependences ◽  
Ir Emission

A series of glass samples of the tungsten–tellurite system TeO2-WO3-Bi2O3-(4-x) La2O3-xEr2O3, x = 0; 0.4; 0.5; 0.7; 1.2; 2; 4 mol%, CEr = 0 - 15 × 1020 cm−3 were synthesized from high-purity oxides in an oxygen flow inside a specialized sealed reactor. In all samples of the series, an extremely low content of hydroxyl groups was achieved (~n × 1016 cm−3, more than 4 orders of magnitude lower than the concentration of erbium ions), which guarantees minimal effects on the luminescence properties of Er3+. The glasses are resistant to crystallization up to 4 mol% Er2O3, and the glass transition temperatures do not depend on the concentration of erbium oxide when introduced by replacing lanthanum oxide. Thin 0.2 mm plates have high transmittance at a level of 20% in the 4.7–5.3 µm range, and the absorption bands of hydroxyl groups at about 2.3, 3, and 4.4 µm, which are typical for ordinary tellurite glass samples, are indistinguishable. The introduction of erbium oxide led to an insignificant change in the refractive index. Er2O3-concentration dependences of the luminescence intensities and lifetimes near the wavelengths of 1.53 and 2.75 μm were found for the 4I13/2–4I15/2 and 4I11/2–4I13/2 /transitions of the Er3+ ion. The data obtained are necessary for the development of mid-infrared photonics; in particular, for the design of Er3+-doped fiber lasers.

Broadband mid-infrared emission in Dy3+/Er3+ co-doped tellurite glass

2021 ◽  
Vol 236 ◽  
pp. 118078
Author(s):  
Yu Zhang ◽  
Lizhang Xia ◽  
Xinjie Shen ◽  
Jun Li ◽  
Gaobo Yang ◽  
...  
Keyword(s):  
Tellurite Glass ◽  
Infrared Emission ◽  
Mid Infrared ◽  
Co Doped

scholarly journals Synthesis and biotical activity of bacterial cellulose 6-(2-phthalimidoethanesulfonate)

2020 ◽  
Vol 61 (2) ◽  
pp. 29-36
Author(s):  
Zoya P. Belousova ◽  
Keyword(s):  
Bacterial Cellulose ◽  
Side Reaction ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Cellulose Derivatives ◽  
Wound Surface ◽  
Reaction Products ◽  
Absorption Bands ◽  
Hydroxymethyl Group ◽  
Antibacterial And Antifungal

Bacterial cellulose obtained by culturing Gluconacetobacter sucrofermentans in HS environment was converted to sulfonate derivatives using methane-, toluene- and 2-phthalimidoethanesulfonic acids in pyridine. When the ratio of the starting reagents is 1 : 1, the modification of bacterial cellulose according to the primary hydroxyl group of glucopyranose fragments is most likely. The formation of 6-substituted bacterial cellulose derivatives was observed in the reaction mixture. The IR spectra of the reaction products contain absorption bands, which are specific for (O–SO2) group in the region 1377-1338 cm−1 (as), 1178-1154 cm−1 (s), fragments of the corresponding sulfonic acids, as well as free hydroxyl groups of glucopyranose in the region 3495-3382 cm−1. Bacterial cellulose 2-phthalimidoethanesulfonate was dissolved in pyridine. After drying with a desiccant in a desiccator, it turned into a dense transparent film of brown color. The increased molecular film allows to explain the side reaction occurring between the oxo group and fragments of one of the chains of modified cellulose and the non-substituted hydroxymethyl group. The IR spectrum of bacterial cellulose 6-(2-phthalimidoethanesulfonate) contains absorption bands in the region 1711 cm−1, which are specific for (Ar–CO–O) group, and absorption bands in the region 1618 cm−1, which prove the presence of (CO–NH) group. In order to impart antibiotic properties to the bacterial cellulose 6-(2-phthalimido-ethanesulfonate) film, it was physically modified with clotrimazole. The obtained experimental data showed that the films subjected to treatment with a 1% solution of clotrimazole have antibacterial and antifungal effects and prevent the growth of pathogenic microbiota on the wound surface. The exit rates of clotrimazole from the bacterial cellulose 6-(2-phthalimidoethanesulfonate) film and from the pure bacterial cellulose film differed, but only slightly. 2-Phthalimidoethanesulfonate bacterial cellulose films can be used to form composites of effective wound covering, since in addition to the unique properties of bacterial cellulose itself (low allergenicity and adhesion to the wound surface, high hygroscopicity) they will have a regenerating effect.

scholarly journals OLIGOMERIC SILSESQUIOXANES COMBINING AZO- AND FLUORESCENT DYES IN ORGANIC SHELL

2019 ◽  
Vol 85 (4) ◽  
pp. 71-80
Author(s):  
Mariana Gumenna ◽  
Nina Klimenko ◽  
Alexandr Stryutsky ◽  
Alexandr Shevchuk ◽  
Viktor Kravchenko ◽  
...  
Keyword(s):  
Absorption Band ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Hydroxyl Groups ◽  
Uv Spectrum ◽  
Absorption Bands ◽  
Organic Shell ◽  
Similar Band ◽  
Inorganic Nanocomposites ◽  
Epoxy Groups

A method for the synthesis of reactive oligomeric silsesquioxanes, combining fragments of azo dye 4-(phenylazo)phenol and fluorescent dye Rhodamine B in various proportions in an organic shell was developed. These compounds were obtained by the reaction between the oligosilsesquioxane nanoparticles consisting of a mixture of linear, branched, ladder and polyhedral structures with epoxy groups in an organic frame (OSS–Ep) and the dyes. The structure of the synthesized substances was characterized by the methods of IR and 1H NMR spectroscopy. The UV-Vis spectra of OSS–Pp–Rh in DMF solution contain absorption bands characteristic of both acidic (560 and 350 nm) and lactone (in the range of 318–326 nm) forms of Rhodamine B. The absorption band of 4-(phenylazo) phenol fragments corresponding to π−π* transition is observed at 348 nm and overlaps the absorption band of Rhodamine B at 350 nm.The intensity of the absorption bands of fragments of various dyes depends on their content in organic frame of the silsesquioxane core. The intensity of the absorption bands at 348 nm and at 560 nm increases with an increase in the content of 4-(phenylazo)phenol and Rhodamine B correspondingly.It should be noted that when using DMF as a solvent the absorption band corresponding to acidic form of Rhodamine B at 560 nm in the UV-Vis spectra of the compounds obtained is more intense than similar band in the spectrum of the original Rhodamine B. Therefore, the attachment of Rhodamine B to the silsesquioxane core of oligomeric silsesquioxanes mixture does not have a significant effect on the position of absorption maxima in the UV-spectrum and prevents dye’s fragments from converting to the colorless lactone form. In the fluorescence spectra of OSS–Pp–Rh obtained using DMF as a solvent a peak at λ max = 592 nm (λex= 520 nm) is observed. The position of the fluorescence peak and its intensity in the spectra at the same optical density of the medium practically do not depend on the ratio of fragments of 4-(phenylazo)phenol and Rhodamine B in organic frame of OSS–Pp–Rh.  The combination of two different chromophores in organic shell of the silsesquioxane core broadens the range of absorbed light and the change of their ratio allows to adjust the absorption intensity in a certain area. The presence of hydroxyl groups makes it possible to introduce the obtained compounds into the composition of polymeric organic-inorganic nanocomposites by covalent bonding.

scholarly journals Spectroscopic and structural characterization of barium tellurite glass fibers for mid-infrared ultra-broad tunable fiber lasers

2016 ◽  
Vol 6 (6) ◽  
pp. 2095 ◽  
Author(s):  
W. C. Wang ◽  
W. J. Zhang ◽  
L. X. Li ◽  
Y. Liu ◽  
D. D. Chen ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Fiber Lasers ◽  
Tellurite Glass ◽  
Glass Fibers ◽  
Mid Infrared

scholarly journals Extruded tellurite glass and fibers with low OH content for mid-infrared applications

2012 ◽  
Vol 2 (4) ◽  
pp. 432 ◽  
Author(s):  
Heike Ebendorff-Heidepriem ◽  
Kevin Kuan ◽  
Michael R. Oermann ◽  
Kenton Knight ◽  
Tanya M. Monro
Keyword(s):  
Tellurite Glass ◽  
Mid Infrared ◽  
Oh Content

Samarium Concentration and Optical Correlation of Tellurite Glass

2015 ◽  
Vol 1107 ◽  
pp. 443-448
Author(s):  
Sib Krishna Ghoshal ◽  
Azmirawahida Zainuddin ◽  
Ramli Arifin ◽  
M.R. Sahar ◽  
Md Supar Rohani ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tellurite Glass ◽  
Urbach Energy ◽  
Photonic Devices ◽  
Rare Earth Ions ◽  
Indirect Transition ◽  
Absorption Bands ◽  
Quenching Effect ◽  
Quenching Method ◽  
Inorganic Glasses

Modifying the structural and optical properties of inorganic glasses via controlled doping of various rare earth ions by inhibiting the quenching effect is a challenging task. We report the influence of samarium (Sm3+) ions concentration on enhanced optical properties of tellurite glass. A series of glasses with composition (0.80-x)TeO2 + 0.10Li2O + 0.10 Na2O + xSm2O3, where 0.0<x <0.03 mol% are prepared using melt quenching method and optical characterizations are performed. The XRD spectra confirm the amorphous nature of the glass. The Urbach energy decreases and the optical gap for both direcet and indirect transitions increases with the increse of samerium contents. The UV-Vis spectra comprised of eight absorption bands and PL spectra reveal four prominet peaks corresponding to various transitions from the ground state to the excited states of Sm3+ ion. The optical response shows significant enhancement with increasing concentration of samerium ions. Our detail experimental analyses may be useful for the development of tellurite glass based photonic devices. Keywords: Tellurite Glass, Sm3+ ions, Urbach Energy, Direct and Indirect Transition.

Possibilities of laser amplification and measurement of the field structure of ultrashort pulses in the range of 2.7–3 μm in tellurite glass fibres doped with erbium ions

2018 ◽  
Vol 48 (12) ◽  
pp. 1118-1127 ◽  
Author(s):  
E A Anashkina ◽  
V V Dorofeev ◽  
S V Muravyev ◽  
S E Motorin ◽  
A V Andrianov ◽  
...  
Keyword(s):  
Tellurite Glass ◽  
Ultrashort Pulses ◽  
Field Structure ◽  
Glass Fibres ◽  
Erbium Ions ◽  
Laser Amplification

Luminescence from erbium oxide grown on silicon

2001 ◽  
Vol 692 ◽  
Author(s):  
E. Nogales ◽  
B. Méndez ◽  
J. Piqueras ◽  
R. Plugaru ◽  
J. A. García ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Luminescence Spectra ◽  
Visible Range ◽  
Infrared Range ◽  
Silicon Substrates ◽  
Thermal Treatments ◽  
Erbium Oxide ◽  
Erbium Ions ◽  
Different Types ◽  
Substrate Properties

AbstractThe luminescence properties of erbium oxide grown on crystalline and amorphous silicon substrates were studied by means of photo- and cathodoluminescence techniques. Differences in the luminescence spectra for samples grown on the two types of substrates used are explained in terms of the different types of erbium centers formed by taking into account the substrate properties and the thermal treatments during growth. For comparison, erbium implanted and oxygen coimplanted crystalline and amorphous silicon have been also investigated by luminescence techniques. In the implanted samples, the sharp transitions from erbium ions in the visible range were quenched and the main emission corresponds to the intraionic transitions in Er3+ ions in the infrared range peaked at 1,54 μm.

Gold Nanoparticles Embedded Erbium-Lead-Tellurite Glass: Bonding Parameters Evaluation

2017 ◽  
Vol 268 ◽  
pp. 97-101
Author(s):  
E.S. Sazali ◽  
Md Rahim Sahar ◽  
Sib Krishna Ghoshal
Keyword(s):  
Tellurite Glass ◽  
Positive Sign ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
Au Nps ◽  
X Ray ◽  
Bonding Parameters ◽  
Amorphous Nature ◽  
Uv Visible ◽  
Absorption Characteristics

Au NPs contents dependent modifications in the absorption and bonding parameters are inspected. Glass systems with composition (79-y)TeO2 – 15PbO – 5PbCl2 – 1Er2O3 – (y)AuCl3 where 0.0 ≤ y ≤ 0.1 mol% are prepared and characterized using X-ray Diffraction (XRD). The absorption characteristics of the glass are observed using UV-Visible-NIR (UV-VIS-NIR) spectrophotometer. XRD spectra confirm the amorphous nature of all samples. UV-VIS-NIR spectra reveal seven absorption bands centered at about 490, 526, 551, 652, 800, 982 and 1520 nm originating from 4I15/2 to 4F7/2, 2H11/2, 4S3/2,4F9/2, 4I9/2, 4I11/2 and 4I13/2 transitions, respectively. The low value of indicated an increase in the covalency and the positive sign of for all glass systems indicates the bonding between the RE ions and the surrounding ligand is covalent in nature.

Preparation and optical properties of TeO 2 –BaO–ZnO–ZnF 2 fluoro-tellurite glass for mid-infrared fiber Raman laser applications

2017 ◽  
Vol 66 ◽  
pp. 567-572 ◽  
Author(s):  
Jie Li ◽  
Xusheng Xiao ◽  
Shaoxuan Gu ◽  
Yantao Xu ◽  
Zhiguang Zhou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tellurite Glass ◽  
Raman Laser ◽  
Laser Applications ◽  
Mid Infrared
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