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Passive mode converter with a periodically tilted InP/GaInAsP rib waveguide



IEEE Photonics Technology Letters 4 (1992), No.1, pp.34-6
ISSN: 1041-1135
Journal Article
Fraunhofer HHI ()
difference equations; electro-optical devices; gallium arsenide; iii-v semiconductors; indium compounds; integrated optics; integrated optoelectronics; optical losses; optical waveguides; iii-v semiconductor; InP (001); oeic; passive mode converter; scalar 2d finite difference methods; electrooptical control; periodically tilted inp/GaInAsP rib waveguide; te to tm converters; coherent optical system applications; stepped substrate; vectorial two-dimensional finite difference methods; te/tm-beatlength; excess loss; 3 db; InP-GaInAsP

TE to TM converters with constant 45 degrees operation are a key component in OEICs for coherent optical system applications. A passive TE/TM-mode converter with a laterally tilted rib waveguide fabricated on a stepped substrate is proposed and investigated. The conversion effect has been simulated using scalar and vectorial two-dimensional finite difference methods. The device fabricated on (001)-InP/GaInAsP yields 45 degrees conversion with two subsequent elements of half the TE/TM-beatlength at an excess loss of 3 dB.