Compact and broadband polarization rotator based on stair-shaped waveguide assisted by subwavelength gratings

Chenbin Zhang; Fuling Zhang; Minfeng Jin; Ding Ding; Zhongzhi Lin; Hui Zhang; Xiangning Chen

doi:10.1117/12.2575349

10 October 2020 Compact and broadband polarization rotator based on stair-shaped waveguide assisted by subwavelength gratings

Chenbin Zhang, Fuling Zhang, Minfeng Jin, Ding Ding, Zhongzhi Lin, Hui Zhang, Xiangning Chen

Author Affiliations +

Proceedings Volume 11547, Optoelectronic Devices and Integration IX; 115471Q (2020) https://doi.org/10.1117/12.2575349
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

We propose a compact ultra-broadband silicon-on-insulator polarization rotator. The conversion area of the polarizer rotator is a stair-shaped waveguide, where the middle step is partially replaced by a sub-wavelength grating. The length of the conversion region of the polarization rotator is only 3.36 µm. For TM-TE and TE-TM working cases, the insertion loss is less than 0.9 dB, the polarization conversion efficiency reached 99%, and the polarization extinction ratio is greater than 20 dB, in an ultra-broad wavelength range of 1260 nm to 1740 nm, which covers O-, E-, S-, C-, L-, and Ubands.

Conference Presentation

Citation Download Citation

Chenbin Zhang, Fuling Zhang, Minfeng Jin, Ding Ding, Zhongzhi Lin, Hui Zhang, and Xiangning Chen "Compact and broadband polarization rotator based on stair-shaped waveguide assisted by subwavelength gratings", Proc. SPIE 11547, Optoelectronic Devices and Integration IX, 115471Q (10 October 2020); https://doi.org/10.1117/12.2575349

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