Anti-resonant hollow core fibres guide light through a gas or vacuum core. In this way the guided light is largely decoupled from the solid fibre material, greatly reducing material contributions to fibre non-linearity, damage thresholds and absorption [1,2]. At present, there are two types of HCFs. Hubei Key Laboratory of Intelligent Wireless Communications, Hubei Engineering Research Center of Intelligent Internet of Things Technology, College of Electronics and Information Engineering, South-Central University for Nationalities, Wuhan 430074, China Key Laboratory of Optoelectronic. Lumentum's Hollow-Core Anti-Resonant Fibers (HC-ARFs) are engineered for high-power laser transmission featuring high threshold for non-linear effects, exceptional beam quality, and low dispersion. Designed for consistent fundamental-mode operation, HC-ARFs offer stable, high-quality beam. We report the fabrication and characterisation of a multi-core anti-resonant hollow core fibre with low inter-core coupling. Their propagation losses were measured to be between 0.
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