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Opt Lett. 2012 Sep 1;37(17):3483-5. doi: 10.1364/OL.37.003483.

Wideband subwavelength gratings for coupling between silicon-on-insulator waveguides and optical fibers.

Author information

1
Department of Electronic Engineering, The Chinese University of Hong Kong, NT, Hong Kong, China.

Abstract

We propose and experimentally demonstrate a novel subwavelength grating coupler on silicon-on-insulator, for coupling to optical fibers with a wide optical bandwidth. Theoretical analysis and design optimization of the coupler are described. About 73 nm 1 dB bandwidth was experimentally demonstrated with -5.6  dB coupling efficiency. Better than -3.4  dB efficiency with 86 nm 1 dB bandwidth is predicted for these structures with optimized buried oxide thickness.

PMID:
22940923
DOI:
10.1364/OL.37.003483

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