title: Bridging the gap between optical fibers and silicon photonic integrated circuits.
abstract: We present a rigorous approach for designing a highly efficient coupling between single mode optical fibers and silicon nanophotonic waveguides based on diffractive gratings. The structures are fabricated on standard SOI wafers in a cost-effective CMOS process flow. The measured coupling efficiency reaches -1.08 dB and a record value of -0.62 dB in the 1550 nm telecommunication window using a uniform and a nonuniform grating, respectively, with a 1 dB-bandwidth larger than 40 nm.
authors: Wissem Sfar
authors: WS
authors: Zaoui
authors: Andreas
authors: A
authors: Kunze
authors: Wolfgang
authors: W
authors: Vogel
authors: Manfred
authors: M
authors: Berroth
authors: Jörg
authors: J
authors: Butschke
authors: Florian
authors: F
authors: Letzkus
authors: Joachim
authors: J
authors: Burghartz