A trench-assisted multicore fiber (TA-MCF) with single-supermode transmission and nearly zero flattened dispersion is proposed herein. By adding a simplified microstructure cladding with only one ring of low-index inclusions on the basis of the multicore fiber. the microstructure cladding and mode-coupling mechanism were jointly employed into the TA-MCF to modulate light transmission.... https://danddcollectiblers.shop/product-category/essential-tote/