Weinert, C.M.C.M.WeinertHeidrich, H.H.Heidrich2022-03-032022-03-031993https://publica.fraunhofer.de/handle/publica/18388210.1109/68.205626Accurate calculations of polarization rotation at abrupt waveguide interfaces are performed by a vectorial two-dimensional finite difference scheme. It is shown that the small orthogonal component of the vector field in rib waveguides can play an important role in mode polarization rotation. Polarization rotations in mode converters fabricated on InGaAsP/InP by periodically arranged tilted waveguides or periodic loading of the rib are explained by these calculations, and design rules for passive mode converter devices are given.engallium arsenidegallium compoundsiii-v semiconductorsindium compoundsintegrated opticslight polarisationoptical rotationoptical waveguide theory2d vectorial finite difference schemesemiconductorspassive te/tm mode converterpolarization rotationabrupt waveguide interfacessmall orthogonal componentvector fieldrib waveguidesmode polarization rotationperiodically arranged tilted waveguidesperiodic loadingdesign rulesinpInGaAsP-InP621535journal article