Effect of Thermal Annealing on Mid-Infrared Transmission in Semiconductor Alloy-Core Glass-Cladded Fibers

Mustafa Ordu; Jicheng Guo; Ahmet E. Akosman; Shyamsunder Erramilli; Siddharth Ramachandran; Soumendra N. Basu

doi:10.1007/s42765-020-00030-2

Advanced Fiber Materials ›› 2020, Vol. 2 ›› Issue (3) : 178-184. DOI: 10.1007/s42765-020-00030-2

Research Article

Effect of Thermal Annealing on Mid-Infrared Transmission in Semiconductor Alloy-Core Glass-Cladded Fibers

Mustafa Ordu¹^,²^,^a ,
Jicheng Guo³^,⁴ ,
Ahmet E. Akosman⁵ ,
Shyamsunder Erramilli³^,⁶^,⁷ ,
Siddharth Ramachandran³^,⁷^,⁸ ,
Soumendra N. Basu¹^,³^,⁷

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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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Mustafa Ordu, Jicheng Guo, Ahmet E. Akosman, Shyamsunder Erramilli, Siddharth Ramachandran, Soumendra N. Basu. Effect of Thermal Annealing on Mid-Infrared Transmission in Semiconductor Alloy-Core Glass-Cladded Fibers. Advanced Fiber Materials, 2020, 2(3): 178‒184 https://doi.org/10.1007/s42765-020-00030-2