All Outputs (24)

Short review and prospective: chalcogenide glass mid-infrared fibre lasers (2024)
Journal Article

Rare-earth ion doped, silica glass, optical fibre amplifiers have transformed the world by enabling high speed communications and the Internet. Fibre lasers, based on rare-earth ion doped silica glass optical fibres, achieve high optical powers and a... Read More about Short review and prospective: chalcogenide glass mid-infrared fibre lasers.

Deuterium occupation of interatomic hole sites in Ni67Zr33 amorphous alloy (2023)
Journal Article

The occupation of interatomic hole sites by deuterium in a deuterated Ni67Zr33 amorphous alloy was investigated using diffraction measurements and a combination of reverse Monte Carlo and molecular dynamics simulation techniques. The results show tha... Read More about Deuterium occupation of interatomic hole sites in Ni67Zr33 amorphous alloy.

Room temperature mid-infrared fiber lasing beyond 5  µm in chalcogenide glass small-core step index fiber (2021)
Journal Article

We report mid-infrared fiber lasing for the first time above 5 µm in a room temperature, Ce 3+ doped, chalcogenide glass, step index fiber using in-band pumping with a 4.15 µm quantum cascade laser. The lasing fiber is 64 mm long, with a calculated n... Read More about Room temperature mid-infrared fiber lasing beyond 5  µm in chalcogenide glass small-core step index fiber.

Atomic structure of sodium iron phosphate glasses (2020)
Journal Article

The atomic structure of a series of sodium iron phosphate glasses is studied using different experimental techniques: X-ray and neutron diffraction (ND), infrared spectroscopy, extended X-ray absorption fine structure (EXAFS), and X-ray absorption ne... Read More about Atomic structure of sodium iron phosphate glasses.

Yttrium doped phosphate-based glasses: structural and degradation analyses (2020)
Journal Article

This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)-25(CaO)-(30-x)(Na2O)-x(Y2O3) (0?x?5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural... Read More about Yttrium doped phosphate-based glasses: structural and degradation analyses.

Toward a Structural Model for the Aluminum Tellurite Glass System (2020)
Journal Article

Neutron diffraction, 27Al MAS NMR, and 27Al Double Quantum MAS NMR results are presented and analyzed to determine the local environments of the cations in a series of aluminum tellurite glasses. Total scattering results show that, within a maximum T... Read More about Toward a Structural Model for the Aluminum Tellurite Glass System.

Experimental photoluminescence and lifetimes at wavelengths including beyond 7 microns in Sm3+-doped selenide-chalcogenide glass fibers (2020)
Journal Article

1000 ppmw Sm3+-doped Ge19.4Sb9.7Se67.9Ga3 atomic % chalcogenide bulk glass and unstructured fiber are prepared. Near- and mid-infrared absorption spectra of the bulk glass reveal Sm3+ electronic absorption bands, and extrinsic vibrational absorption... Read More about Experimental photoluminescence and lifetimes at wavelengths including beyond 7 microns in Sm3+-doped selenide-chalcogenide glass fibers.

Mid-infrared sources for biomedical applications based on chalcogenide glass fibres (2020)
Journal Article

Many important molecules show strong characteristic vibrational transitions in the mid-infrared (MIR) part of the electromagnetic spectrum. This leads to applications in spectroscopy, chemical and bio-molecular sensing, security and industry, especia... Read More about Mid-infrared sources for biomedical applications based on chalcogenide glass fibres.

Neutron Diffraction and Raman Studies of the Incorporation of Sulfate in Silicate Glasses (2020)
Journal Article

Thermal and crystallization kinetics of yttrium-doped phosphate-based glasses (2019)
Journal Article

© 2019 The American Ceramic Society and Wiley Periodicals, Inc Yttrium-doped glasses have been utilized for biomedical applications such as radiotherapy, especially for liver cancer treatment. In this paper, the crystallization behavior of phosphate-... Read More about Thermal and crystallization kinetics of yttrium-doped phosphate-based glasses.

Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths (2019)
Journal Article

A two-composition thin film (Ge20Sb10Se70/Ge20Sb10Se67S3 atomic%core/cladding glasses) was fabricated using a hot-fibre-pressing technique in which both glasses follow the same post-fibre processing. A simple approach is proposed that uses normal inc... Read More about Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths.

In vitro cellular testing of Strontium/Calcium substituted phosphate glass discs and microspheres shows potential for bone regeneration (2019)
Journal Article

Phosphate glasses (PBG) are ideal materials for regenerative medicine strategies since their composition, degradation rates and ion release profiles can easily be controlled. Strontium has previously been found to simultaneously affect bone resorptio... Read More about In vitro cellular testing of Strontium/Calcium substituted phosphate glass discs and microspheres shows potential for bone regeneration.

Experimental and numerical investigation to rationalize both near-infrared and mid-infrared spontaneous emission in Pr3+ doped selenide-chalcogenide fiber (2019)
Journal Article

This contribution reports on detailed experimental and numerical investigations of both near-infrared (NIR) and mid-infrared (MIR) photoluminescence obtained in praseodymium trivalent ion doped chalcogenide-selenide glass fiber. The experimental anal... Read More about Experimental and numerical investigation to rationalize both near-infrared and mid-infrared spontaneous emission in Pr3+ doped selenide-chalcogenide fiber.

Comparative study of praseodymium additives in active selenide chalcogenide optical fibers (2018)
Journal Article

The choice of rare earth additive when doping chalcogenide glasses can affect their mid-infrared fiber performance. Three praseodymium additives, Pr-foil, PrCl3 and PrI3 are investigated in Ge-As-Ga-Se fibers. All the fibers are X-ray amorphous and t... Read More about Comparative study of praseodymium additives in active selenide chalcogenide optical fibers.

Numerical analysis of spontaneous mid-infrared light emission from terbium ion doped multimode chalcogenide fibers (2018)
Journal Article

In this contribution we use a numerical model to study the photoluminescence emitted by Tb3+ doped chalcogenide-selenide glass fibers pumped by laser light at approximately 3 µm. The model consists of the set of ordinary differential equations (ODEs)... Read More about Numerical analysis of spontaneous mid-infrared light emission from terbium ion doped multimode chalcogenide fibers.

Numerical modelling of Tb3+ doped selenide-chalcogenide multimode fibre based spontaneous emission sources (2017)
Journal Article

A model is developed of a terbium (III) ion doped selenide chalcogenide glass fibre source that provides spontaneous emission within the mid-infrared (MIR) wavelength range. Three numerical algorithms are used to calculate the solution and compare th... Read More about Numerical modelling of Tb3+ doped selenide-chalcogenide multimode fibre based spontaneous emission sources.

Structural and physico-chemical analysis of calcium/ strontium substituted, near-invert phosphate based glasses for biomedical applications (2017)
Journal Article

Neutron diffraction, 23Na and 31P NMR and FTIR spectroscopy have been used to investigate the structural effects of substituting CaO with SrO in a 40P2O5·(16 x)CaO·20Na2O·24MgO·xSrO glass, where x is 0, 4, 8, 12 and 16 mol%. The 31P solid-state NMR r... Read More about Structural and physico-chemical analysis of calcium/ strontium substituted, near-invert phosphate based glasses for biomedical applications.

Multicomposition EPSR: toward transferable potentials to model chalcogenide glass structures (2016)
Journal Article

The structure of xAs40Se60–(1 – x)As40S60 glasses, where x = 1.000, 0.667, 0.500, 0.333, 0.250, and 0.000, is investigated using a combination of neutron and X-ray diffraction coupled with computational modeling using multicomposition empirical poten... Read More about Multicomposition EPSR: toward transferable potentials to model chalcogenide glass structures.

Dy3+-doped selenide chalcogenide glasses: influence of Dy3+ dopant-aditive and containment (2016)
Journal Article

This work reports on process‐induced impurities in rare‐earth ion: Dy3+‐doped selenide chalcogenide glasses, which are significant materials for active photonic devices in the mid‐infrared region. In particular, the effect of contamination from t... Read More about Dy3+-doped selenide chalcogenide glasses: influence of Dy3+ dopant-aditive and containment.

Alkali environments in tellurite glasses (2015)
Journal Article

Neutron diffraction measurements are reported for five binary alkali tellurite glasses, xM2O · (100 − x)TeO2 (containing 10 and 20 mol% K2O, 10 and 19 mol% Na2O, and 20 mol% 7Li2O), together with 23Na MAS NMR measurements for the sodium containing gl... Read More about Alkali environments in tellurite glasses.