FD-BPMFinite Difference Beam Propagation Method
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The IL curves reported in Figures 5 and 6, calculated by Equation (3) from the FD-BPM transmittance spectra, correspond to the states from 1 to 4 in Table 1.
A three-waveguide Mach-Zehnder switch configuration was proposed and analyzed through numerical simulations based on the FEM and FD-BPM models.
This conceptual simplicity also benefits the user of the FD-BPM based modeling tool as well as the implementer, since an understanding of the results and proper usage of the tool can be readily grasped by a non-expert in numerical methods.