Journal
OPTICS EXPRESS
Volume 22, Issue 18, Pages 21800-21805Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.021800
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Funding
- Science and Engineering Research Council of A*STAR (Agency for Science, Technology and Research), Singapore
- SERC [1323300001]
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In this paper we have designed, fabricated and characterized a high efficiency Silicon nitride grating coupler at 1490 nm. Distributed Bragg reflectors as bottom mirrors are employed to improve the coupling efficiency by reflecting the downward traveling light. The peak coupling efficiency obtained is about -2.5 dB and the 1-dB bandwidth is 53 nm. The fabrication process is CMOS-compatible and is ready to be integrated with photonic circuits. (C) 2014 Optical Society of America
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