A simple coupled-mode analysis method for multiple-core optical fiber and coupled dielectric waveguide structures

The coefficients of coupling between two adjacent cores are estimated on the basis of the point matching of boundary conditions on the surface of the two cores. The coupled-mode fields of the multiple-core structures are then approximated by using the fields of the two adjacent cores. Parameters calculated with this procedure are compared with those obtained from a more rigorous analysis, showing good agreement in most cases.<
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