Zhan Jiahao, Brock Joseph, Veilleux Sylvain, Dagenais Mario
Opt Express. 2021 May 10;29(10):14476-14485. doi: 10.1364/OE.420499.
We present the design and experimental results of a novel polarization beam splitter (PBS) with a high polarization extinction ratio (PER) made on a SiN platform. The PBS is composed of two identical polarization-independent multi-mode interferometers and two identical apodized Bragg gratings. The operating principle of this device is based on the fact that the TE and TM stopbands of the grating are centered at different wavelengths. The reflected and transmitted light from the gratings are routed to separate output ports by the two-MMI configuration. The experimental results show that a PER of > 30 dB is achieved over a bandwidth of 22 nm, with an insertion loss of ∼ 1.1 dB. The total length of the device is ∼ 820 µm.
我们展示了一种在氮化硅平台上制作的具有高偏振消光比（PER）的新型偏振分束器（PBS）的设计和实验结果。该偏振分束器由两个相同的偏振无关多模干涉仪和两个相同的变迹布拉格光栅组成。该器件的工作原理基于光栅的TE和TM阻带中心波长不同这一事实。光栅的反射光和透射光通过双多模干涉仪配置被路由到不同的输出端口。实验结果表明，在22 nm带宽内实现了大于30 dB的偏振消光比，插入损耗约为1.1 dB。该器件的总长度约为820 µm。
