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  • Received: Apr. 9, 2015

    Accepted: Jun. 30, 2015

    Posted: Jan. 23, 2019

    Published Online: Sep. 14, 2018

    The Author Email: Junbo Yang (

    DOI: 10.3788/COL201513.091301

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    Jingjing Zhang, Junbo Yang, Huanyu Lu, Wenjun Wu, Jie Huang, Shengli Chang. Polarization-independent grating coupler based on silicon-on-insulator[J]. Chinese Optics Letters, 2015, 13(9): 091301

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Chinese Optics Letters, Vol. 13, Issue 9, 091301 (2015)

Polarization-independent grating coupler based on silicon-on-insulator

Jingjing Zhang1, Junbo Yang1,2,*, Huanyu Lu1,3, Wenjun Wu1, Jie Huang1, and Shengli Chang1

Author Affiliations

  • 1Center of Material Science, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory on Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China
  • 3University of Electronic Science and Technology of China, Chengdu 610054, China


A novel and simple polarization independent grating couplers is designed and analyzed here, in which the TE polarization and the TM polarization light can be simultaneously coupled into a silicon waveguide along the same direction with high coupling efficiency. For the polarization-insensitive grating coupler, the coupling efficiencies of two orthogonal polarizations light are more than 60% at 1550 nm wavelength based on our optimized design parameters including grating period, etching height, filling factor, and so on. For TE mode the maximum efficiency is 72% with more than 30 nm 1 dB bandwidth, simultaneously, for TM mode the maximum efficiency is 75.15% with 40 nm 1 dB bandwidth. Their corresponding wavelength difference between two polarizations’ coupling peaks is demonstrated to be 35 nm. Polarization independent grating coupler designed here can be widely used in optical communication and optical information processing.

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