Silicon waveguide grating coupler based on a segmented grating structure

Jianxun Hong, Feng Qiu, Andrew M. Spring, Shiyoshi Yokoyama

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We present the simulation, fabrication, and experimental results of a high-efficiency and wide-bandwidth segmented waveguide grating coupler on a silicon-on-insulator platform for near vertical optical coupling between the waveguide and optical fiber. The coupler comprises segmented gratings, which can increase vertical coupling to the optical fiber and reduce backward reflection. The proposed grating coupler has a 3 dB bandwidth of 71.4 nm and a coupling efficiency of 51.7% at a wavelength of 1550 nm. Compared with the standard uniform waveguide grating coupler, the coupling efficiency was improved by 25.64%.

Original languageEnglish
Pages (from-to)3301-3305
Number of pages5
JournalApplied Optics
Issue number12
Publication statusPublished - Apr 20 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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