Directional coupler based on radiatively coupled waveguides

We investigate a system of two waveguides with leaky modes sharing a common substrate (radiatively coupled waveguides). The main advantage of such a system is the possibility of remote coupling. A perturbation theory is developed for both TE and TM polarization. Numerical calculations of dispersion...

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Bibliographic Details
Published in:Applied optics (2004) 1997-01, Vol.36 (3), p.635-641
Main Authors: Shamonin, M, Lohmeyer, M, Hertel, P
Format: Article
Language:English
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Summary:We investigate a system of two waveguides with leaky modes sharing a common substrate (radiatively coupled waveguides). The main advantage of such a system is the possibility of remote coupling. A perturbation theory is developed for both TE and TM polarization. Numerical calculations of dispersion curves and of the coupling length allow us to determine the limitations of the perturbation theory. We study the influence of multimode interference on the process of beating by considering the propagation of a given initial field. Finally, we propose a new design for an effective, integrated optical TE-TM polarization splitter.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.36.000635