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Opt Express. 2014 Jan 27;22(2):1277-86. doi: 10.1364/OE.22.001277.

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.

PMID:
24515133

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