Design of Air-Trenches/Holes Assisted Depressed-Core 12-Mode Fiber for Less MIMO Space Division Multiplexing

An air-trenches/holes assisted depressed-core few-mode fiber (AT-AH-DC-FMF) that features some asymmetrical air trenches, holes and a depressed step-index core is proposed in this paper. The AT DC can produce great contribution separating the non-degenerated LP modes spatial modes, thus suppressing crosstalk efficiently. Based on AH, bending loss values of AT-AH-DC-FMF be satisfied with ITU-T recommendations G. 654. simulation results indicate our support 12 effective index difference between adjacent (Δneff) larger than 1.03×10-3 (δneff) 1.24×10-4. broadband characteristics such as Δneff, δneff, chromatic dispersion mode field area (Aeff) over whole C L band are comprehensively investigated. Moreover, fabrication methods birefringence detailed discussed. Our possesses potential to applied less multiple-input multiple-output (MIMO-less) space-division multiplexing (SDM) enlarging optical communication capacity simplifying system complexity.