Title :
Increasing the grating coupler bandwidth with a high numerical-aperture fiber
Author :
Chao Xiang ; Hon Ki Tsang ; Zhenzhou Cheng ; Chun-Kit Chan
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
We propose and demonstrate that a small core high numerical-aperture single mode fiber will increase the coupling bandwidth of a silicon waveguide grating coupler. Without modifying the grating coupler design, the 1-dB coupling bandwidth was increase by ~60% to 53nm without significant coupling efficiency degradation.
Keywords :
diffraction gratings; optical design techniques; optical fibre couplers; silicon; coupling bandwidth; coupling efficiency degradation; grating coupler bandwidth; grating coupler design; silicon waveguide grating coupler; small core high numerical-aperture single mode fiber; Bandwidth; Couplers; Couplings; Fiber gratings; Gratings; Optical fiber couplers;
Conference_Titel :
Group IV Photonics (GFP), 2014 IEEE 11th International Conference on
Conference_Location :
Paris
Print_ISBN :
978-1-4799-2282-6
DOI :
10.1109/Group4.2014.6962042
