Design and investigation of a dual-layer grating coupler for efficient vertical fiber-chip coupling

Jiyao Yu, Hirohito Yamada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A novel dual-layer grating coupler was designed for efficient vertical coupling between a single-mode fiber and silicon nanowires, with characteristics of polarization diversity and both wavelength bands of 1.3 and 1.55 μm. Theoretical analysis and two-dimensional finite-difference time-domain simulations were applied to verify the performance of the design. Optimized results show that the coupling efficiencies of a dual-port output of 41% (-3.87 dB) for transverse-electric polarization at 1.56 μm, 32.88% (-4.83 dB) for transverse-magnetic (TM) polarization at 1.58 μm, and 27.06% (-5.68 dB) for TM polarization at 1.32 μm can be achieved. Dual-layer Fabry-Perot resonance was also investigated for high coupling efficiency.

Original languageEnglish
Article number012004
JournalApplied Physics Express
Volume12
Issue number1
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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