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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(HE11a, HE11b, TM01, HE21a, HE21b, TE01, HE31a, HE31b, EH11a, EH11b, HE12a, HE12b, EH21a, EH21b, HE41a, HE41b) 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 neff, min&#x0394;neff, and Aeff. The DMD, modal confinement loss and bending loss are also investigated. The simulation results indicate that the proposed fiber can obtain large min&#x0394;neff between adjacent vector modes (~2 &#x00D7; 0.0001), and can be a promising candidate for MIMO-DSP simplified short-haul MDM transmission systems.

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