Comparison of different modelling techniques for longitudinally invariant integrated optical waveguides

In order to compare various modelling techniques for the eigenmode analysis of integrated optical waveguides, twelve different methods are applied to the analysis of two typical III–V rib waveguidesl Both a single and a coupled waveguide case are considered. Results focus on the effective refractive index value for the lowest order TE-mode in the case of the single waveguide, and on the coupling length between the lowest order symmetric and antisymmetric TE-modes of the coupled waveguides.This paper is the result of the joint effort of thirteen research groups in the framework of the Device Modelling group of the COST-216 project.