Design and optimization of 32-core rod/trench assisted square-lattice structured single-mode multi-core fiber

We propose and design a kind of heterogeneous rod-assisted and trench-assisted multi-core fiber (Hetero-RA-TA-MCF) with 32 cores arranged in square-lattice structure (SLS), and then we introduce the design method for Hetero-RA-TA-MCF. Simulation results show that the Hetero-RA-TA-32-Core-Fiber achieves average effective area (A_eff) of about 74 μm², low crosstalk (XT) of about -31 dB/100km, threshold value of bending radius (R_pk) of 7.0 cm, relative core multiplicity factor (RCMF) of 8.74, and cable cutoff wavelength (λ_cc) of less than 1.53 μm.