Design of polarization-insensitive 2 x 2 multimode interference coupler based on double strip silicon nitride waveguides

OPTICS COMMUNICATIONS

卷:410

Article

Yang, Huimin¹  Zheng, Pengfei¹  Liu, Panpan¹  Hu, Guohua¹  Yun, Binfeng¹  Cui, Yiping¹ 

[1] Southeast Univ, Adv Photon Ctr, Nanjing 210096, Jiangsu, Peoples R China

关键词: Polarization-insensitive;    Multimode interference coupler;    Double strip silicon nitride waveguides;   

DOI  :  10.1016/j.optcom.2017.11.003

来源: Elsevier

【 摘 要 】

A polarization-insensitive 2 x 2 multimode interference coupler based on double strip silicon nitride waveguides is proposed and optimized by using the three-dimensional finite difference time domain method. By optimizing the device's structure parameters in detail, polarization independent excess loss of -0.32dB is obtained, and negligible output uniformities of -0.02dB and -0.03dB could be achieved for the TE and TM mode, respectively. The optimized polarization-insensitive 2 x 2 multimode interference coupler could be served as a building block on the double strip silicon nitride waveguides platform. (c) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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