Chen Weiwei, Zhang Bohao, Wang Pengjun, Dai Shixun, Liang Wei, Li Hongxiang, Fu Qiang, Li Jun, Li Yan, Dai Tingge, Yu Hui, Yang Jianyi
Opt Express. 2020 Oct 12;28(21):30701-30709. doi: 10.1364/OE.408432.
In this paper, an on-chip silicon polarization beam splitter using a particle-swarm-optimized counter-tapered directional coupler is proposed, designed, and fabricated. The coupling length of the proposed device is only 5 µm. As the waveguide width variation ΔW increases from -20 to 20 nm, the simulated polarization extinction ratio larger than 18.67 dB and the corresponding insertion loss lower than 0.17 dB are achieved. Measured experimental results achieved insertion loss <0.50 dB, TE polarization extinction between 16.68 to 31.87 dB, TM polarization extinction between 17.78 to 31.13 dB, over the wavelength range 1525 to 1600 nm.
本文提出、设计并制作了一种采用粒子群优化的反向锥形定向耦合器的片上硅偏振分束器。所提出器件的耦合长度仅为5μm。随着波导宽度变化量ΔW从-20nm增加到20nm，实现了模拟偏振消光比大于18.67dB且相应插入损耗低于0.17dB。在1525至1600nm波长范围内，实测实验结果实现了插入损耗<0.50dB，TE偏振消光在16.68至31.87dB之间，TM偏振消光在17.78至31.13dB之间。
