Numerical analysis of step-index channel waveguides designed with a formally-equivalent separable index profile |
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| Authors: | José Ramón Salgueiro Jesús Liñares Vicente Moreno María C. Nistal |
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| Affiliation: | área de óptica, Departamento de Fisica Aplicada , Universidade de Santiago de Compostela , E.U. de óptica, Campus Sur, E-15782, Santiago de Compostela, Spain |
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| Abstract: | Abstract A numerical test is proposed to evaluate the separability of a modal field supported by an inverted-rib waveguide, which was properly designed to make its general non-separable index profile formally equivalent to a separable one. The possibility of obtaining such a separable equivalent profile leads to much more simplicity in the design of channel waveguides and other more complicated integrated devices, since it is possible to obtain a quasi-exact solution to the modal propagation problem by using the effective index method. The influence of the different waveguide parameters on the field separability is also investigated in order to evaluate the flexibility of the design method. |
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