Y. Li, D. Vermeulen, Y. De Koninck, G. Yurtsever, G. Roelkens, and R. Baets, "Fiber couplers for silicon-on-insulator photonic IC’s with optimized on-chip return loss,"
in National Fiber Optic Engineers Conference,
OSA Technical Digest
(Optical Society of America, 2012), paper JTh2A.8.
A novel grating coupler design with a high return loss is demonstrated for silicon-on-insulator photonic IC’s. The average return loss is around 10 dB better than that of a commonly used focusing grating coupler.