Journal
OPTICS EXPRESS
Volume 20, Issue 26, Pages B238-B243Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.00B238
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Funding
- Stuttgart Center of Photonic Engineering (SCoPE)
- Deutsche Forschungsgemeinschaft (DFG) [2256/8-3]
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A highly efficient grating structure for the coupling between standard optical fibers and single-mode waveguides in the silicon-on-insulator platform realized in a CMOS fabrication process is presented. The cost-effective method introduces a backside metal mirror to the grating coupler without need of an extensive wafer-to-wafer bonding. A coupling efficiency of -1.6 dB (around 69%) near the telecommunication wavelength 1550 nm and a large 1dB-bandwidth of 48 nm are achieved. (C) 2012 Optical Society of America
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