Abstract
Vertical mode size transformation from 300nm-thick Si-waveguide to 6~7μm, coupling to standard single-mode fiber was demonstrated using CMOS-compatible Si/SiO2 multilayer on-chip GRIN lens (length~11.5μm). Multilayer GRIN lens to fiber coupling loss of 2.9dB was achieved.
© 2011 Optical Society of America
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