In terahertz (THz) communications, most of the research work is focused on wireless systems, while waveguide/fiber-based links have been less explored. Although wireless communications have several advantages, the fiber-based communications provide superior performance in certain short-range communication applications with complex geometrical environments. In this work, we present an in-depth experimental and numerical study of the short-range THz communications links (carrier frequency:128 GHz) that use subwavelength dielectric fibers of varying diameters (0.57-1.75 mm) and up to 10 m for information transmission (up to 6 Gbps) and define main challenges and tradeoffs in the link implementation.
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