Optical fibers and waveguides designed for broadband infrared transmission, spanning approximately 1 micron to over 20 microns, have historically faced challenges such as high cost, brittleness, environmental susceptibility, and fragility, limiting their widespread practical use. In this paper, we introduce a new approach utilizing molten-core fiber manufacturing to create silver halide cores. The core composition shows improved broadband transmission, ranging from 0.6 micron to over 25 microns. Additionally, we report the fabrication of isotropic silver halide material with reduced crystalline scattering. The optical measurements and structural analysis of halide core material suggest the pathway for lower-loss infrared fibers and components with directly laser-written plasmonic structures.
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