Browsing by Subject "Semiconductor-core fibers"

Now showing 1 - 3 of 3

Open Access
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.
Open Access
Numerical investigation of confinement losses in semiconductor-core optical fibers
(IEEE, 2021-08-27) Syed, Mustafa W.; Akosman, Ahmet E.; Ordu, Mustafa
The sources of the confinement losses in semiconductor-core optical fibers are numerically investigated by introducing fabrication-inspired imperfections such as micro-cracks and core ellipticity. The imperfections increase the losses up to 200 dB/m at the targeted spectrum that is comparable to experimental findings.
Open Access
Recent progress in germanium-core optical fibers for mid-infrared optics
(Elsevier, 2020) Ordu, Mustafa; Basu, S. N.
The search for low-loss and robust optical fibers in the infrared spectrum has always been an important research topic for many investigators. Over the years, fibers of various materials groups have been proposed to obtain ‘the ultimate infrared fiber’. Recently, a new competitive alternative has emerged: the semiconductor-core glass-cladded optical fibers. The excellent bulk materials properties and integrated circuit applications reveals the potential of semiconductors as fiber materials. One of the important photonic materials that has been proposed as a fiber-core material is germanium. In this paper, the development of Ge-based fibers and their optical properties in the mid-infrared spectrum are discussed. The performance of Ge-based fibers has been compared with other semiconductor-core fibers. Recent developments in the area of semiconductor fibers and the future prospects of semiconductors as infrared fiber materials are also discussed.