Abstract

A full-vector finite element method has been used to investigate the high-index-core Bragg fibers including mode field distribution and mode effective index. The influence on the high-index-core Bragg fiber dispersion properties of the low-index-layer filling ratio variations of different rings has been identified. Near-zero flattened dispersion over wide wavelength range was demonstrated in the one-dimensional high-index-core microstructured optical fibers with non-uniform low-index-layer filling ratio in different rings. Both flattened dispersion and low confinement loss can be achieved with finite number of low-index-layer rings.

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