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Comparative study of praseodymium additives in active selenide chalcogenide optical fibers (2018)
Journal Article
Tang, Z., Sojka, L., Furniss, D., Nunes, J., Sakr, H., Barney, E., …Seddon, A. B. (2018). Comparative study of praseodymium additives in active selenide chalcogenide optical fibers. Optical Materials Express, 8(12), 3910-3926. https://doi.org/10.1364/OME.8.003910

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.

Modeling of resonantly pumped mid-infrared Pr3+-doped chalcogenide fiber amplifier with different pumping schemes (2018)
Journal Article
Shen, M., Furniss, D., Tang, Z., Barney, E. R., Sójka, L., Sujecki, S., …Seddon, A. B. (2018). Modeling of resonantly pumped mid-infrared Pr3+-doped chalcogenide fiber amplifier with different pumping schemes. Optics Express, 26(18), 23641-23660. https://doi.org/10.1364/OE.26.023641

We propose a model for resonantly pumped Pr3+-doped chalcogenide fiber amplifiers which includes excited state absorption and the full spectral amplified spontaneous emission spanning from 2 μm to 6 μm. Based on this model, the observed near- and mid... Read More about Modeling of resonantly pumped mid-infrared Pr3+-doped chalcogenide fiber amplifier with different pumping schemes.

Numerical analysis of spontaneous mid-infrared light emission from terbium ion doped multimode chalcogenide fibers (2018)
Journal Article
Sujecki, S., Sojka, L., Pawlik, E., Anders, K., Piramidowicz, R., Tang, Z., …Seddon, A. (2018). Numerical analysis of spontaneous mid-infrared light emission from terbium ion doped multimode chalcogenide fibers. Journal of Luminescence, 199, https://doi.org/10.1016/j.jlumin.2018.03.031

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
Sujecki, S., Sójka, L., Bereś-Pawlik, E., Sakr, H., Tang, Z., Barney, E. R., …Seddon, A. B. (2017). Numerical modelling of Tb3+ doped selenide-chalcogenide multimode fibre based spontaneous emission sources. Optical and Quantum Electronics, 49(12), Article 416. https://doi.org/10.1007/s11082-017-1255-5

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.

Determining the refractive index dispersion and thickness of hot-pressed chalcogenide thin films from an improved Swanepoel method (2017)
Journal Article
Fang, Y., Jayasuriya, D., Furniss, D., Tang, Z., Sojka, Ł., Markos, C., …Benson, T. (2017). Determining the refractive index dispersion and thickness of hot-pressed chalcogenide thin films from an improved Swanepoel method. Optical and Quantum Electronics, 49, Article 237. https://doi.org/10.1007/s11082-017-1057-9

The well-known method presented by Swanepoel can be used to determine the refractive index dispersion of thin films in the near-infrared region from wavelength values at maxima and minima, only, of the transmission interference fringes. In order to e... Read More about Determining the refractive index dispersion and thickness of hot-pressed chalcogenide thin films from an improved Swanepoel method.

Measurement of non-linear optical coefficients of chalcogenide glasses near the fundamental absorption band edge (2017)
Journal Article
Romanova, E., Kuzyutkina, Y., Shiryaev, V., Abdel-Moneim, N., Furniss, D., Benson, T., …Guizard, S. (2018). Measurement of non-linear optical coefficients of chalcogenide glasses near the fundamental absorption band edge. Journal of Non-Crystalline Solids, 480, https://doi.org/10.1016/j.jnoncrysol.2017.03.031

A time-resolved pump-probe method is used for the evaluation of non-linear optical coefficients of chalcogenide glasses from the As-S-Se and Ge-Se systems near their fundamental absorption band edges. The results are analyzed via comparison with the... Read More about Measurement of non-linear optical coefficients of chalcogenide glasses near the fundamental absorption band edge.

Promising emission behavior in Pr 3+ /In selenide-chalcogenide-glass small-core step index fiber (SIF) (2017)
Journal Article
Sakr, H., Tang, Z., Furniss, D., Sojka, L., Sujecki, S., Benson, T. M., & Seddon, A. B. (2017). Promising emission behavior in Pr 3+ /In selenide-chalcogenide-glass small-core step index fiber (SIF). Optical Materials, 67, 98-107. https://doi.org/10.1016/j.optmat.2017.03.034

Selenide-chalcogenide glass, small-core, step-index fiber (SIF), core-doped with Pr3+: 9.51 × 1024 ions m−3 (500 ppmw) is fabricated for the first time with indium to help solubilize Pr3+. Core diameters of 20 or 40 μm are confirmed using scanning el... Read More about Promising emission behavior in Pr 3+ /In selenide-chalcogenide-glass small-core step index fiber (SIF).

Dy3+-doped selenide chalcogenide glasses: influence of Dy3+ dopant-aditive and containment (2016)
Journal Article
Furniss, D., Tang, Z., Barney, E., Neate, N. C., Benson, T., & Seddon, A. (2016). Dy3+-doped selenide chalcogenide glasses: influence of Dy3+ dopant-aditive and containment. Journal of the American Ceramic Society, 99(7), 2283-2291. doi:10.1111/jace.14218

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.

Toward Mid-Infrared, Subdiffraction, Spectral-Mapping of Human Cells and Tissue: SNIM (Scanning Near-Field Infrared Microscopy) Tip Fabrication (2015)
Journal Article
Neate, N., Fay, M., Parmenter, C., Athanasiou, G. S., Ernst, J., Furniss, D., …Seddon, A. B. (2016). Toward Mid-Infrared, Subdiffraction, Spectral-Mapping of Human Cells and Tissue: SNIM (Scanning Near-Field Infrared Microscopy) Tip Fabrication. Journal of Lightwave Technology, 34(4), 1212-1219. https://doi.org/10.1109/JLT.2015.2496786

Scanning near-field infrared microscopy (SNIM) potentially enables subdiffraction, broadband mid-infrared (MIR:3–25-μm wavelength range) spectral-mapping of human cells and tissue for real-time molecular sensing, with prospective use in disease diagn... Read More about Toward Mid-Infrared, Subdiffraction, Spectral-Mapping of Human Cells and Tissue: SNIM (Scanning Near-Field Infrared Microscopy) Tip Fabrication.

Predictive, Miniature Co-Extrusion of Multilayered Glass Fiber-Optic Preforms (2015)
Journal Article
Bhowmick, K., Furniss, D., Morvan, H. P., Seddon, A. B., & Benson, T. M. (2016). Predictive, Miniature Co-Extrusion of Multilayered Glass Fiber-Optic Preforms. Journal of the American Ceramic Society, 99(1), 106-114. https://doi.org/10.1111/jace.13937

A miniature co-extrusion technique, to produce a concentric multilayered glass fiber-optic preform of ~3 mm diameter, is modeled and experimentally demonstrated. A three-dimensional, incompressible, noncavitating, and nonisothermal Computational Flui... Read More about Predictive, Miniature Co-Extrusion of Multilayered Glass Fiber-Optic Preforms.

Core/clad phosphate glass fibres containing iron and/or titanium (2015)
Journal Article
Ahmed, I., Shahruddin, S., Sharmin, N., Furniss, D., & Rudd, C. D. (2015). Core/clad phosphate glass fibres containing iron and/or titanium. Biomedical Glasses, 1(1), https://doi.org/10.1515/bglass-2015-0004

Phosphate glasses are novel amorphous biomaterials due to their fully resorbable characteristics, with controllable degradation profiles. In this study, phosphate glasses containing titanium and/or iron were identified to exhibit sufficiently matched... Read More about Core/clad phosphate glass fibres containing iron and/or titanium.

Low loss Ge-As-Se chalcogenide glass fiber, fabricated using extruded preform, for midinfrared photonics (2015)
Journal Article
Tang, Z., Shiryaev, V. S., Furniss, D., Sojka, L., Sujecki, S., Benson, T., …Churbanov, M. F. (2015). Low loss Ge-As-Se chalcogenide glass fiber, fabricated using extruded preform, for midinfrared photonics. Optical Materials Express, 5(8), 1722-1737. https://doi.org/10.1364/OME.5.001722

Chalcogenide glass fibers have attractive properties (e.g. wide transparent window, high optical non-linearity) and numerous potential applications in the mid-infrared (MIR) region. Low optical loss is desired and important in the development of thes... Read More about Low loss Ge-As-Se chalcogenide glass fiber, fabricated using extruded preform, for midinfrared photonics.

Mid-infrared photoluminescence in small-core fiber of praseodymium-ion doped selenide-based chalcogenide glass (2015)
Journal Article
Tang, Z., Furniss, D., Fay, M., Sakr, H., Sójka, L., Neate, N., …Seddon, A. B. (2015). Mid-infrared photoluminescence in small-core fiber of praseodymium-ion doped selenide-based chalcogenide glass. Optical Materials Express, 5(4), 870-886. https://doi.org/10.1364/OME.5.000870

© 2015 Optical Society of America. Rare earth (RE)-ion doped chalcogenide glasses are attractive for mid-infrared (MIR) fiber lasers for operation >4 μm. Our prior modeling suggests that praseodymium (Pr) is a suitable RE-ion dopant for realizing a s... Read More about Mid-infrared photoluminescence in small-core fiber of praseodymium-ion doped selenide-based chalcogenide glass.

Correlating structure with non-linear optical properties in xAs40Se60 x (1 ? x)As40S60 glasses (2015)
Journal Article
Barney, E. R., Abdel-Moneim, N. S., Towey, J. J., Titman, J., McCarthy, J. E., Bookey, H. T., …Seddon, A. B. (2015). Correlating structure with non-linear optical properties in xAs40Se60 x (1 − x)As40S60 glasses. Physical Chemistry Chemical Physics, 17(9), 6314-6327. https://doi.org/10.1039/c4cp05599c

A series of xAs40Se60·(100 − x)As40S60 glasses, where x = 0, 25, 33, 50, 67, 75 and 100 mol% As40Se60, has been studied using neutron and X-ray total scattering, Raman spectroscopy and 77Se MAS-NMR. The results are presented with measurements of non-... Read More about Correlating structure with non-linear optical properties in xAs40Se60 x (1 ? x)As40S60 glasses.

The local environment of Dy3+in selenium-rich chalcogenide glasses (2014)
Journal Article
Barney, E. R., Tang, Z., Seddon, A., Furniss, D., Sujecki, S., Benson, T. M., …Gianolio, D. (in press). The local environment of Dy3+in selenium-rich chalcogenide glasses. RSC Advances, 4(80), https://doi.org/10.1039/C4RA07192A

The environment of Dy3+ is investigated when it is added as DyCl3 or Dy foil into two base glasses, Ge16.5As19−xGaxSe64.5, where x = 3 or 10 at%, at doping levels between 0 and 3000 parts per million by weight (ppmw) Dy3+. Extended X-ray Absorption F... Read More about The local environment of Dy3+in selenium-rich chalcogenide glasses.

Mid-infrared supercontinuum generation to 12.5?m in large NA chalcogenide step-index fibres pumped at 4.5?m (2014)
Journal Article
Kubat, I., Agger, C. S., Møller, U., Seddon, A. B., Tang, Z., Sujecki, S., …Bang, O. (2014). Mid-infrared supercontinuum generation to 12.5μm in large NA chalcogenide step-index fibres pumped at 4.5μm. Optics Express, 22(16), 19169-19182. https://doi.org/10.1364/oe.22.019169

We present numerical modeling of mid-infrared (MIR) supercontinuum generation (SCG) in dispersion-optimized chalcogenide (CHALC) step-index fibres (SIFs) with exceptionally high numerical aperture (NA) around one, pumped with mode-locked praseodymium... Read More about Mid-infrared supercontinuum generation to 12.5?m in large NA chalcogenide step-index fibres pumped at 4.5?m.