Title :
High-efficiency folded shallow-grating coupler with minimal back reflection toward isolator-free optical integration
Author :
Masatoshi Tokushima;Jun Ushida;Toshinori Uemura;Kazuhiko Kurata
Author_Institution :
Photonics Electronics Technology Research Association (PETRA), West 7A 4F, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
Abstract :
Back reflection from grating couplers can be an obstacle to integrate them with isolator-free light sources. A folded shallow-grating coupler is proposed. We numerically confirmed a back reflection of -27 dB while achieving an upward emitting efficiency of -0.58 dB.
Keywords :
"Gratings","Optical fibers","Optical coupling","Optical reflection","Optical feedback","Adaptive optics"
Conference_Titel :
Optical Communication (ECOC), 2015 European Conference on
DOI :
10.1109/ECOC.2015.7341732
