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Vectorial simulation of passive TE/TM mode converter devices on InP

: Weinert, C.M.; Heidrich, H.


IEEE Photonics Technology Letters 5 (1993), No.3, pp.324-6
ISSN: 1041-1135
Journal Article
Fraunhofer HHI ()
gallium arsenide; gallium compounds; iii-v semiconductors; indium compounds; integrated optics; light polarisation; optical rotation; optical waveguide theory; 2d vectorial finite difference scheme; semiconductors; passive te/tm mode converter; polarization rotation; abrupt waveguide interfaces; small orthogonal component; vector field; rib waveguides; mode polarization rotation; periodically arranged tilted waveguides; periodic loading; design rules; inp; InGaAsP-InP

Accurate 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.