Abstract
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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Acknowledgements
This project is supported by the National Science Foundation (NSF, Grant number CMMI-1301108, 2013). We would like to thank Y. Gautam for discussion on simulations.
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Ordu, M., Guo, J., Akosman, A.E. et al. Effect of Thermal Annealing on Mid-Infrared Transmission in Semiconductor Alloy-Core Glass-Cladded Fibers. Adv. Fiber Mater. 2, 178–184 (2020). https://doi.org/10.1007/s42765-020-00030-2
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DOI: https://doi.org/10.1007/s42765-020-00030-2