Marvin Henniges, S. Meister, H. Rhee, C. Theiss, H. Robers, M. Grehn, D. Stolarek, L. Zimmermann, U. Woggon
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Abstract
A zone plate, etched into the backend of a silicon-on-insulator chip, was designed to improve the optical coupling efficiency between grating couplers and non-perpendicular light sources with an elliptical beam profile. Measurements of a highly divergent light source showed efficiency improvements up to 8.7dB.
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