Compact high-efficiency perfectly-vertical grating coupler on silicon at O-band.

@article{Wang2017CompactHP,
  title={Compact high-efficiency perfectly-vertical grating coupler on silicon at O-band.},
  author={Siya Wang and Yue Hong and Yuntao Zhu and Jingye Chen and Shengqian Gao and Xinlun Cai and Yaocheng Shi and Liu Liu},
  journal={Optics express},
  year={2017},
  volume={25 18},
  pages={22032-22037}
}
A compact, high-efficiency grating coupler is demonstrated for interfacing a silicon waveguide and a perfectly-vertical fiber at O-band. The grating lies on a tilted silicon membrane for minimizing the reflections. Circular grating lines are adopted to shorten the overall device length to about 60μm. 57% peak coupling efficiency and >28nm 1-dB coupling… CONTINUE READING