Journal
OPTICS EXPRESS
Volume 22, Issue 2, Pages 1277-1286Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.001277
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Funding
- Stuttgart Center of Photonic Engineering (SCoPE)
- German Research Foundation (DFG) [BE 2256/8-3]
- German Federal Ministry of Education and Research (BMBF) through the SASER project [16BP12507]
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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 1dB-bandwidth larger than 40 nm. (C) 2014 Optical Society of America
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