Design of Weakly-Coupled 16-Vector-Mode Coaxial Bragg FMF for Short-Haul Communication

• Main Authors: Yiying Zhang, Fang Ren, Xiaojie Fan, Jinyu Zhang, Jingjing Niu, Jianping Wang
• Format: Article
• Language: English
• Published: IEEE 2020-01-01
• Series: IEEE Access
• Subjects: Mode division multiplexing; short-haul communication; weakly-coupled; few-mode Bragg fiber
• Online Access: https://ieeexplore.ieee.org/document/9270001/

Utilizing weakly-coupled few-mode-fibers (FMFs) for MIMO-DSP eliminating in short-haul mode division multiplexing(MDM) systems has attracted much attention recently, as an effective solution to suppress modal crosstalk. In this article, we propose a weakly-coupled 16-vector-mode coaxial Bragg FMF supporting 16 vector modes(HE_11a, HE_11b, TM₀₁, HE_21a, HE_21b, TE₀₁, HE_31a, HE_31b, EH_11a, EH_11b, HE_12a, HE_12b, EH_21a, EH_21b, HE_41a, HE_41b) which works across the C-band and explore the possibility for weakly-coupled Bragg FMFs. We optimize the geometric parameters and evaluate their effects on modal n_eff, minΔn_eff, and A_eff. The DMD, modal confinement loss and bending loss are also investigated. The simulation results indicate that the proposed fiber can obtain large minΔn_eff between adjacent vector modes (~2 × 0.0001), and can be a promising candidate for MIMO-DSP simplified short-haul MDM transmission systems.