Open AccessBroadband dispersion compensating ring-core fiber for orbital angular momentum modes
Author(s) -
Wenqian Zhao,
Xu Han,
Wenpu Geng,
Yingning Wang,
Yuxi Fang,
Changjing Bao,
Zhi Wang,
Yange Liu,
Yongxiong Ren,
Zhongqi Pan,
Yang Yue
Publication year - 2022
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.470553
Subject(s) - dispersion shifted fiber , optics , graded index fiber , zero dispersion wavelength , polarization maintaining optical fiber , polarization mode dispersion , materials science , dispersion (optics) , mode volume , single mode optical fiber , photonic crystal fiber , multi mode optical fiber , angular momentum , optical fiber , physics , fiber optic sensor , quantum mechanics
A well designed ring-core fiber can theoretically support numerous orbital angular momentum (OAM) modes with low crosstalk for space-division-multiplexing (SDM) data transmission, which is considered as a promising solution for overcoming the capacity crunch in optical communication network. However, the accumulated chromatic dispersion in OAM-fiber could limit the data speed and transmission distance of communication systems. A potential solution is to insert a dispersion compensation ring-core fiber with opposite-sign of dispersion in the transmission fiber along the fiber link. In this work, we propose a triple ring-core fiber with broadband negative dispersion. A highest negative dispersion of -24.47 ps/(nm·km) at 1550 nm and an average dispersion slope in the C band from -0.182 ps/(nm 2 ·km) to 0.065 ps/(nm 2 ·km) can be achieved to compensate multi-order dispersion. The effects of Ge-doping concentration fluctuation in the high-index ring core and fabrication errors on fiber geometric structures are also investigated. Furthermore, the effective mode area decreases as the widths of high-index rings increase due to the enhanced confinement ability. The designed triple ring-core fiber could offer potential for compensating OAM fiber links with positive dispersions.