Rare earth elements as a source of impurities in doped chalcogenide glasses

Суханов, М. В.; Velmuzhov, А.P.; Otopkova, P.A.; Ketkova, L.А.; Evdokimov, I.I.; Kurganova, A.E.; Плотниченко, В. Г.; Shiryaev, V.S.

doi:10.1016/j.jnoncrysol.2022.121793

Cited by 9 publications

(8 citation statements)

References 25 publications

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“…The most important functional parameter of the optical fiber sensor is the low level of optical losses in the operating spectral range. To prepare the high-purity glass samples that provide low-loss fibers we developed special purification methods [25,[42][43][44][45][46][47][48]. Particular attention in our work was paid to methods for removing limiting impurities (hydrogen, oxygen, carbon), since these impurities absorb radiation in the transparency range of glasses.…”

Section: Materials For Fiber Sensorsmentioning

confidence: 99%

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Recent Achievements in Development of Chalcogenide Optical Fibers for Mid-IR Sensing

Shiryaev

Velmuzhov

Kotereva

et al. 2023

Fibers

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Recent results of research of passive and active optical waveguides made of high-purity chalcogenide glasses for middle infrared fiberoptic evanescent wave spectroscopy of liquid and gaseous substances are presented. On the basis of selenide and telluride glass fibers, novel types of highly sensitive fiber probes are developed. On the basis of Pr(3+)- and Tb(3+)-doped Ga(In)-Ge-As-Se and Ga-Ge-Sb-Se glass fibers, the 4.2–6 μm wavelength radiation sources are created for all-fiber sensor systems. Successful testing of chalcogenide glass fiber sensors for the analysis of some liquid and gaseous mixtures was carried out.

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Section: Materials For Fiber Sensorsmentioning

confidence: 99%

“…For the cladding of step-index fibers, the Ge-As-S, As-S, Ge-As-Sb-S, or Ge-As-Se-S glasses, with compositions that provides close viscous and thermal properties, and the required numerical aperture were chosen. More detailed studies of these glasses are described in our papers [34,35,45,46,48,49].…”

Section: Materials For Fiber Sensorsmentioning

confidence: 99%

Recent Achievements in Development of Chalcogenide Optical Fibers for Mid-IR Sensing

Shiryaev

Velmuzhov

Kotereva

et al. 2023

Fibers

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“…3 показаны микроскопические изображения образцов, полученные в ближнем ИК диапазоне. На рисунке хорошо видны, как установлено в [13], кристаллы GeSe 2 , причем в нелегированных образцах содержание таких включений заметно больше, чем в легированных. В нелегированных образцах из серии с тербием диаметр наблюдаемых кристаллов составляет 3−55 µm, а из серии с диспрозием -2−36 µm (рис.…”

Section: результаты измеренийunclassified

“…Одной из возможных причин наличия кристаллов в нелегированных халькогенидных стеклах является присутствие примеси кислорода в форме Ge−O, являющейся зародышем для роста кристаллов GeSe 2 . Более электроположительные РЗЭ связывают кислород [13] и тормозят рост кристаллов.…”

Section: определение параметров характеризующих край пфпunclassified

“…В настоящей работе проведены исследования формы края ПФП для ХС состава Ga 5 Ge 20 Sb 10 Se 65 , легированных ионами Tb 3+ и Dy 3+ (содержание ионов от 0 до 0.3 wt%). Стекла были получены методом прямого плавления особо чистых веществ: Ga, Ge, Sb -6N, Se -5N, Tb и Dy -3N [12,13]. Загрузка компонентов стекла осуществлялась на воздухе и без дополнительной очистки.…”

Section: Introductionunclassified

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Оптические свойства халькогенидных стекол системы Ga-Ge-Sb-Se, легированных ионами тербия и диспрозия, вблизи края полосы фундаментального поглощения

Кузюткина¹,

Паршина²,

Романова³

et al. 2023

Оптика И Спектроскопия

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In the paper, results of measurements of the optical response of chalcogenide glasses of the Ga5Ge20Sb10Se65 composition doped with rare-earth ions Tb3+ or Dy3+, in the wavelength range of 0.7 – 1.5 μm by the method of IR spectroscopy are presented. Parameters characterizing the fundamental absorption band edge of the glasses - optical bandgap energy, Urbach tail parameter and weak absorption tail parameter - have been evaluated. It has been found that doping in low concentrations (up to 0.3 mass%) does not influence the optical bandgap energy and optical properties of the glasses in the range of the Urbach tail, but in the range of the weak absorption tail, optical response of the glasses depends on the activator concentration. Crystallization of the glasses produced by the direct melting method also depends on the activator concentration. In the glasses doped with Dy3+, absorption bands of the ion are located in the range of the weak absorption tail of the glass that makes possible energy transfer between the ions and the gap states of the charge carriers.

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Rare-earth metals as effective getters for purification of germanium telluride glasses from oxygen impurities

Velmuzhov

Суханов

Tyurina

et al. 2023

Journal of Non-Crystalline Solids

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Rare earth elements as a source of impurities in doped chalcogenide glasses

Cited by 9 publications

References 25 publications

Recent Achievements in Development of Chalcogenide Optical Fibers for Mid-IR Sensing

Recent Achievements in Development of Chalcogenide Optical Fibers for Mid-IR Sensing

Оптические свойства халькогенидных стекол системы Ga-Ge-Sb-Se, легированных ионами тербия и диспрозия, вблизи края полосы фундаментального поглощения

Rare-earth metals as effective getters for purification of germanium telluride glasses from oxygen impurities

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