Abstract
We propose a broadband polarization-independent grating coupler with etched triangular grooves on a silicon-on-insulator (SOI) wafer. A peak coupling efficiency of −3 dB and an extreme large 1 dB bandwidth of 220 nm are achieved simultaneously. The PDL performance can be within 0.1dB in 1490 nm and 1550 nm band.
© 2014 Optical Society of America
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