Understanding bending-induced loss and bending-enhanced higher-order mode suppression in negative curvature fibers

We present a numerical analysis on bending-induced loss and bending-enhanced higher-order mode suppression in negative curvature fibers. provide underlying mechanisms how geometrical parameters affect the bending properties. find that fiber influence performance by altering resonant coupling conditions, as well light leakage through inter-tube gaps. identify regions parameter space exhibit excellent properties offer general guidelines for designing fibers are less sensitive to bending. Moreover, we explore possibility of enhancing core mechanical up nine-fold increase extinction ratio can be achieved fiber.