An efficient compact edge coupler based on double-stage structure

Shangbin Sun; Yuanxiang Chen; Jia Fu; Shangjing Lin; Hu Zhu; Liping Sun; Jianguo Yu

doi:10.1117/12.2644213

9 September 2022 An efficient compact edge coupler based on double-stage structure

Shangbin Sun, Yuanxiang Chen, Jia Fu, Shangjing Lin, Hu Zhu, Liping Sun, Jianguo Yu

Proceedings Volume 12328, Second International Conference on Optics and Image Processing (ICOIP 2022); 1232808 (2022) https://doi.org/10.1117/12.2644213
Event: Second International Conference on Optics and Image Processing (ICOIP 2022), 2022, Taian, China

Abstract

With the increasing integration of optical devices, optical integration technology is becoming more and more important. In this paper, we propose double-stage end coupler based on SiO₂. The double stage taper structure greatly shortens the size of the coupler and ensures a high coupling efficiency. In this paper, we take an arrayed waveguide grating output waveguide and a ridge waveguide of photodetector as application scenarios, the cross-sectional areas of the two are 4.5× 4.5 um and 2×1.04 um respectively. Then, the coupler parameters are designed. By adding couplers, we can improve the coupling efficiency from 73.3% to 96.4%. At the same time, the length of the proposed coupler is only 900um. In addition, the model also has wider operation bandwidth, lower polarization dependence loss and larger alignment error tolerance. The coupling efficiency of the model in the 1270 - 1350 nm band is higher than 94.8%. At the same time, the polarization dependence loss is only 0.35dB, and the alignment error tolerance of 1 dB is more than 1500 nm, which ensures the model can be well applied to the field of photonic integration.

Citation Download Citation

Shangbin Sun, Yuanxiang Chen, Jia Fu, Shangjing Lin, Hu Zhu, Liping Sun, and Jianguo Yu "An efficient compact edge coupler based on double-stage structure", Proc. SPIE 12328, Second International Conference on Optics and Image Processing (ICOIP 2022), 1232808 (9 September 2022); https://doi.org/10.1117/12.2644213

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KEYWORDS

Waveguides

Tolerancing

Polarization

Diffraction gratings

Single mode fibers

Manufacturing

Photodetectors

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