Design of weakly-coupled trench-assisted five-mode M-type fiber for short-haul communication in O band

摘要

We propose a weakly-coupled trench-assisted M-type fiber supporting five spatial modes for short-haul communication systems across O-band. Numerical simulations are carried out to investigate the influence of design parameters on n(eff), minn(eff), and A(eff) with regions that meet the five-mode condition of the proposed fiber. We also evaluate the differential mode delay between adjacent propagation modes, fiber dispersion and bending loss. Results indicate that the designed fiber can obtain large minn(eff) between adjacent spatial modes (0.001). The proposed fiber can simplify or eliminate MIMO-DSP for short-haul MDM communication systems.