We report a hollow-core photonic crystal fiber that is engineered so as to strongly suppress higher-order modes, i., to provide robust single-mode guidance in all the wavelength ranges where the fiber guides with low loss. Space-Division Multiplexing (SDM) uses multi-core fibers (MCFs) or few-mode fibers (FMFs) to transmit multiple data streams through a single fiber, vastly increasing bandwidth. Additionally, the variations in the wall thickness. In this paper, a low loss and high polarization-maintaining single-mode hollow-core anti-resonant fiber (PM-HC-ARF) is designed.
