Design and optimization of polarimetric independent 3D edge coupler with high coupling tolerance

Shengtao Yu; Xiaoyu Li; Chengqun Gui

doi:10.1117/12.2689860

31 July 2023 Design and optimization of polarimetric independent 3D edge coupler with high coupling tolerance

Shengtao Yu, Xiaoyu Li, Chengqun Gui

Proceedings Volume 12747, Third International Conference on Optics and Image Processing (ICOIP 2023); 127470C (2023) https://doi.org/10.1117/12.2689860
Event: Third International Conference on Optics and Image Processing (ICOIP 2023), 2023, Hangzhou, China

Abstract

In this study, a three-dimensional edge coupler is designed, which is composed of a semi-elliptical wedged structure and a straight waveguide. 3D FDTD is used to calculate the alignment tolerance and coupling efficiency of the designed 3D edge coupler. Simulation results show the coupling performance of the edge coupler with a semi-elliptical cross section is closely related to the length of the major axis and the minor axis of the ellipse. In 1550 nm band TE and TM modes, the coupling efficiency of semi-elliptical edge couplers at the optimal coupling position is 84.93% and 79.80%, respectively. According to the simulation results, the 1dB coupling tolerance of the coupler is 4-5 µm.

Citation Download Citation

Shengtao Yu, Xiaoyu Li, and Chengqun Gui "Design and optimization of polarimetric independent 3D edge coupler with high coupling tolerance", Proc. SPIE 12747, Third International Conference on Optics and Image Processing (ICOIP 2023), 127470C (31 July 2023); https://doi.org/10.1117/12.2689860

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