Abstract
Modal solutions for photonic crystal fibers with circular air-holes in a hexagonal array are presented, by using a rigorous full-vectorial finite element-based approach. The effective indices, mode field profiles, spot-sizes, modal hybridness, modal birefringence and group velocity dispersion values are presented. The effect of external pressure on photonic crystal fibers is analyzed also by using the powerful finite element method. Modal solutions are obtained for both symmetric and asymmetric air-holes and the effect of pressure on the modal properties and mode degeneration are evaluated, presented and discussed.
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