Hosting Second Order Exceptional Point in an All-lossy Dual-Core Photonic Crystal Fiber (2503.03514v1)

Abstract: We report an all-lossy index-guided dual-core photonic crystal fiber (PCF) that hosts a second-order exceptional point (EP) in the systems parameter space. By appropriately selecting a parametric encirclement scheme around the EP, the interaction between the coupled modes has been studied, and the mode conversion is subsequently observed.