Author(s): Zhou, LA (Zhou Liang); Li, ZY (Li Zhi-Yong); Zhu, Y (Zhu Yu); Li, YT (Li Yun-Tao); Fan, ZC (Fan Zhang-Cao); Han, WH (Han Wei-Hua); Yu, YD (Yu Yu-De); Yu, JZ (Yu Jin-Zhong)
Title: A novel highly efficient grating coupler with large filling factor used for optoelectronic integration
Source: CHINESE PHYSICS B, 19 (12): Art. No. 124214 DEC 2010
Abstract: A novel highly efficient grating coupler with large filling factor and deep etching is proposed in silicon-on-insulator for near vertical coupling between the rib waveguide and optical fibre. The deep slots acting as high efficient scattering centres are analysed and optimized. As high as 60% coupling efficiency at telecom wavelength of 1550-nm and 3-dB bandwidth of 61 nm are predicted by simulation. A peak coupling efficiency of 42.1% at wavelength 1546-nm and 3-dB bandwidth of 37.6 nm are obtained experimentally.