Simulation of bended planar waveguides for optical bus-couplers

Lukas Lorenz; Krzysztof Nieweglowski; Klaus-Jürgen Wolter; Karlheinz Bock

doi:10.1117/12.2225447

27 April 2016 Simulation of bended planar waveguides for optical bus-couplers

Lukas Lorenz, Krzysztof Nieweglowski, Klaus-Jürgen Wolter, Karlheinz Bock

Proceedings Volume 9889, Optical Modelling and Design IV; 988902 (2016) https://doi.org/10.1117/12.2225447
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

In our work an optical bus-coupler is proposed, which enables easy bidirectional connection between two waveguides without interrupting the bus using a core-to-core coupling principle. With bended waveguides the coupling ratio can be tuned by adjusting the overlap area of the two cores. In order to ensure large overlap areas at short coupling lengths, the waveguides have rectangular cross sections. To examine the feasibility of this coupling concept a simulation was performed, which is presented in this paper. Due to multimode waveguides, used in short range data communication, a non-sequential ray tracing simulation is reasonable.

Simulations revealed that the bending of the waveguide causes a redistribution of the energy within the core. Small radii push the main energy to the outer region of the core increasing the coupling efficiency. On the other hand, at excessive lowered bend radii additional losses occur (due to a coupling into the cladding), which is why an optimum has to be found. Based on the simulation results it is possible to derive requirements and design rules for the coupling element.

Citation Download Citation

Lukas Lorenz, Krzysztof Nieweglowski, Klaus-Jürgen Wolter, and Karlheinz Bock "Simulation of bended planar waveguides for optical bus-couplers", Proc. SPIE 9889, Optical Modelling and Design IV, 988902 (27 April 2016); https://doi.org/10.1117/12.2225447

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