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Variable grid finite difference methods for study of longitudinally varying planar waveguides

1991; Institution of Engineering and Technology; Volume: 27; Issue: 5 Linguagem: Inglês

10.1049/el

1350-911X

M. Artiglia, P. Di Vita, M. Potenza, G. Coppa, Giovanni Lapenta, Piero Ravetto,

Microwave Engineering and Waveguides

A new discretisation procedure based on a finite difference approach is presented for the analysis of arbitrary two-dimensional optical dielectric waveguides. It is based on a longitudinally variant discretisation grid that allows an accurate treatment of waveguide changes of geometry to be obtained. Comparisons with the well known beam propagation method show a strong improvement in accuracy and computational time saving.