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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 30, Iss. 14 — Jul. 15, 2012
  • pp: 2363–2366

High Efficiency and Broadband Two-Dimensional Blazed Grating Coupler With Fully Etched Triangular Holes

Kun Qin, Dingshan Gao, Changjing Bao, Zhe Zhao, Xu Zhou, Tingting Lu, and Lin Chen

Journal of Lightwave Technology, Vol. 30, Issue 14, pp. 2363-2366 (2012)

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A 2-D blazed grating coupler with fully etched triangular holes to realize high efficient and broadband coupling between silicon-on-insulator nanowaveguide and fiber is proposed. By changing the lateral width of a triangular hole along propagating direction in each single grating period gradually according to effective medium theory, a high coupling efficiency of -2.78 dB and an extremely large 1 dB bandwidth of 180 nm are achieved simultaneously. By optimizing the buried oxide thickness from 2 to 1.83 μm, the coupling efficiency can be further improved to -2.18 dB and 1 dB bandwidth is enlarged to 290 nm.

© 2012 IEEE

Kun Qin, Dingshan Gao, Changjing Bao, Zhe Zhao, Xu Zhou, Tingting Lu, and Lin Chen, "High Efficiency and Broadband Two-Dimensional Blazed Grating Coupler With Fully Etched Triangular Holes," J. Lightwave Technol. 30, 2363-2366 (2012)

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