Simulations of a triple-core gain-loss fiber show chiral and nonchiral mode conversion driven by encirclement of two connected second-order exceptional points, with the effect persisting for loops that pass near but do not encircle the exceptional points.
For a given EP to be properly enclosed within a loop, γ0 must exceed the γ-value associated with that EP
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Dynamically Encircled Higher-order Exceptional Points in an Optical Fiber
Simulations of a triple-core gain-loss fiber show chiral and nonchiral mode conversion driven by encirclement of two connected second-order exceptional points, with the effect persisting for loops that pass near but do not encircle the exceptional points.