Browsing by Author "Guo, J."

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    Efect of thermal annealing on mid infrared transmission in semiconductor alloy core glass cladded fibers
    (Springer, 2020) Ordu, Mustafa; Guo, J.; Akosman, A. E.; Erramilli, S.; Ramachandran, S.; Basu, S. N.
    We report a study investigating the effects of thermal annealing on the optical properties of Si-Ge alloy-core silica-cladded fibers. Low temperature fiber draw was performed with a laboratory-made draw tower at 1760 °C that minimizes impurity diffusion from cladding to the core. As a post-drawing process, Si–Ge core fibers were annealed in a box furnace to alter the core structure. Microstructural and optical properties of fibers were investigated, and transmission losses were measured as 28 dB/cm at 6.1 µm. Numerical studies were performed to analyze the experimental results and to find the optimum structure for low loss semiconductor-core glass-cladded fibers.
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    ItemOpen Access
    Step-index Si-Ge-core silica-cladded optical fibers
    (IEEE, 2020-09) Ordu, Mustafa; Akosman, Ahmet E.; Guo, J.; Erramilli, S.; Ramachandran, S.; N. Basu, S.
    Si-Ge alloy-core silica-cladded fibers were drawn at a low temperature to minimize impurity diffusion. The elemental segregation in the as-drawn fibers was overcome by a thermal treatment. The transmission losses of the fibers were calculated as 28 dB/cm at 6.1 μm wavelength.