Polarization-independent silicon photonic grating coupler for large spatial light spots

doi:10.1088/1674-1056/abbc00

中国物理B ›› 2021, Vol. 30 ›› Issue (2): 24206-0.doi: 10.1088/1674-1056/abbc00

收稿日期:2020-07-13 修回日期:2020-08-24 接受日期:2020-09-28 出版日期:2021-01-18 发布日期:2021-01-18

Polarization-independent silicon photonic grating coupler for large spatial light spots

Lijun Yang(杨丽君)†, Xiaoyan Hu(胡小燕), Bin Li(李斌), and Jing Cao(曹静)

Information Science Academy of China Electronics Technology Group Corporation, Beijing 100086, China

Received:2020-07-13 Revised:2020-08-24 Accepted:2020-09-28 Online:2021-01-18 Published:2021-01-18
Contact: ^†Corresponding author. E-mail: ylj14@tsinghua.org.cn
Supported by:
Project supported by the National High Technology Research and Development Program of China (Grant No. 18-H863-04-ZD-006-007-01).

摘要/Abstract

Abstract: We design and demonstrate a one-dimensional grating coupler with a low polarization-dependent loss (PDL) for large spatial light spots. Based on current fabrication conditions, we first utilize genetic algorithms to find the optimal grating structure including the distributions of duty and periods, making the effective refractive index of transverse electric mode the same as that of transverse magnetic mode. The designed grating coupler is fabricated on the common silicon-on-insulator platform and the PDL is measured to be within 0.41 dB covering the C-band.

Key words: silicon photonics, grating coupler, polarization-dependent loss

中图分类号: (Integrated optics)

42.82.-m

42.82.Et (Waveguides, couplers, and arrays) 42.79.Dj (Gratings) 42.25.Ja (Polarization)

. [J]. 中国物理B, 2021, 30(2): 24206-0.

Lijun Yang(杨丽君), Xiaoyan Hu(胡小燕), Bin Li(李斌), and Jing Cao(曹静). Polarization-independent silicon photonic grating coupler for large spatial light spots[J]. Chin. Phys. B, 2021, 30(2): 24206-0.

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Polarization-independent silicon photonic grating coupler for large spatial light spots

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