中国物理B ›› 2014, Vol. 23 ›› Issue (11): 114206-114206.doi: 10.1088/1674-1056/23/11/114206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

High-efficiency focusing grating coupler with optimized ultra-short taper

杨彪, 李智勇, 俞育德, 余金中   

  1. State Key Laboratory for Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2014-04-08 修回日期:2014-06-06 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2011CB301701), the National High Technology Research and Development Program of China (Grant No. 2012AA012202), the Main Direction Program of Knowledge Innovation of the Chinese Academy of Sciences (Grant No. KGCX2-EW-102), and the National Natural Science Foundation of China (Grant Nos. 61107048 and 61275065).

High-efficiency focusing grating coupler with optimized ultra-short taper

Yang Biao (杨彪), Li Zhi-Yong (李智勇), Yu Yu-De (俞育德), Yu Jin-Zhong (余金中)   

  1. State Key Laboratory for Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2014-04-08 Revised:2014-06-06 Online:2014-11-15 Published:2014-11-15
  • Contact: Yu Yu-De E-mail:yudeyu@semi.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2011CB301701), the National High Technology Research and Development Program of China (Grant No. 2012AA012202), the Main Direction Program of Knowledge Innovation of the Chinese Academy of Sciences (Grant No. KGCX2-EW-102), and the National Natural Science Foundation of China (Grant Nos. 61107048 and 61275065).

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摘要：

A novel high-efficiency focusing non-uniform grating coupler is proposed to couple light into or off silicon photonic chips for large-scale silicon photonic integration. This kind of grating coupler decreases the transition length of the linking taper between the grating and the single-mode waveguide by at least 80%. The radian of the grating lines and the size of the taper are optimized to improve the coupling efficiency. An experimental coupling efficiency of ～ 68% at 1556.24 nm is obtained after optimization and the whole size of the grating is 12 μm × 30 μm, with a very short taper transition of ～ 15 μm long.

关键词: grating coupler, silicon photonics, photonic integrated circuits, silicon-on-insulator

Abstract:

A novel high-efficiency focusing non-uniform grating coupler is proposed to couple light into or off silicon photonic chips for large-scale silicon photonic integration. This kind of grating coupler decreases the transition length of the linking taper between the grating and the single-mode waveguide by at least 80%. The radian of the grating lines and the size of the taper are optimized to improve the coupling efficiency. An experimental coupling efficiency of ～ 68% at 1556.24 nm is obtained after optimization and the whole size of the grating is 12 μm × 30 μm, with a very short taper transition of ～ 15 μm long.

Key words: grating coupler, silicon photonics, photonic integrated circuits, silicon-on-insulator

中图分类号:  (Waveguides, couplers, and arrays)

  • 42.82.Et
42.79.Dj (Gratings) 42.79.Wc (Optical coatings)