A dual-parallel-core fiber is proposed for dispersion compensation of single mode fibers (SMFs) by using
coupled-mode theory. From the numerical results, the two-parallel-core structure exhibits very high negative chromatic
dispersion [-9.7794 × 10<sup>5</sup>ps/km/nm], and full width at half maximum dispersion (FWHM) of ~6nm.
Three asymmetric multi-core fibers namely 3-linear-core-array fiber, 5-linear-core-array fiber and
5-circular-core-array fiber were designed. The supermode characteristics were investigated using a finite element method
(FEM) with perfect matched layer (PML) boundaries. The profiles of supermodes supported by these multi-core fibers
were presented. The dispersion characteristics of these multi-core fibers had been analyzed. The numerical results show
that the peak value group velocity dispersion of the
5-circular-core-array fiber can reach
-2.4×105ps/nm•km, and the
GVD bandwidth is up to 25nm(1535-1560nm), covering almost the whole C-wavelength band. It can compensate for
more than 13000 times its own length that of the ordinary SMF.