17 May 2017 Polarization insensitive Ge-rich silicon germanium waveguides for optical interconnects on silicon
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Abstract
We propose germanium-rich silicon germanium waveguides as a basic building block for polarization insensitive circuitry on silicon. In this work a detailed study of SiGe waveguides geometries is performed to find optimal parameters to simultaneously obtain low polarization sensitivity and single mode operation at λ=1.55μm. The polarization dependence of the effective index, group index and dispersion coefficient is investigated. Optimized geometries are tolerant to fabrication errors and can be realized with the current state of the art CMOS technology. As a next step polarization insensitive multimode interference structures have been designed.
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V. Vakarin, Papichaya Chaisakul, Jacopo Frigerio, Andrea Ballabio, Joan Manel Ramírez, Xavier Le Roux, Jean-René Coudevylle, Laurent Vivien, Giovanni Isella, Delphine Marris-Morini, "Polarization insensitive Ge-rich silicon germanium waveguides for optical interconnects on silicon", Proc. SPIE 10242, Integrated Optics: Physics and Simulations III, 102420T (17 May 2017); doi: 10.1117/12.2265431; https://doi.org/10.1117/12.2265431
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