Compact polarization beam splitter in silicon photonics

Boxia Yan; Mou Bai; Yan Qi; Yanwei Wang; Zhe Han; Yuanyuan Fan; Yu Wang

doi:10.1117/12.2645039

23 January 2023 Compact polarization beam splitter in silicon photonics

Boxia Yan, Mou Bai, Yan Qi, Yanwei Wang, Zhe Han, Yuanyuan Fan, Yu Wang

Proceedings Volume 12556, AOPC 2022: Optoelectronics and Nanophotonics; 125560H (2023) https://doi.org/10.1117/12.2645039
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Based on the asymmetric directional coupler, a polarization beam splitter based on silicon on Insulator (SOI) platform is designed for the wavelength range of 1500nm-1600nm in optical communication in this letter. The asymmetric directional coupler is composed of a regular strip shape waveguide and a sub-wavelength grating waveguide. The influence of the grating period, grating depth, and duty cycle on its polarization characteristics is analyzed. The simulation results show that the polarization extinction ratio (PER) of TE polarization is 20-23 dB and the insertion loss (IL) is 0.01-0.04dB, in the wavelength range of 1500–1600nm, while the PER of TM polarization is 15-26 dB and the IL is 0.3-0.6dB. Especially, the PER and IL are 21 dB (26 dB) and 0.31 dB (0.26 dB) for TE (TM) at the wavelength of 1550 nm. Moreover, the minimum feature size of this device is 25 μm2 . It can be effectively used in semiconductor photoelectronic devices.

Citation Download Citation

Boxia Yan, Mou Bai, Yan Qi, Yanwei Wang, Zhe Han, Yuanyuan Fan, and Yu Wang "Compact polarization beam splitter in silicon photonics", Proc. SPIE 12556, AOPC 2022: Optoelectronics and Nanophotonics, 125560H (23 January 2023); https://doi.org/10.1117/12.2645039

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