Abstract
A compact and broadband polarization beam splitter (PBS) for the silicon-based cross-slot waveguides (CSWs) is proposed by utilizing a cascaded asymmetrical evanescent coupling system composed of two CSWs and a horizontal slot waveguide (HSW) between them. By optimizing the width of the HSW, an asymmetrical directional coupler which can efficiently separate the TE and TM modes is constructed. Numerical results show that a short PBS of ~17.4μm with an insertion loss of 0.16 (0.37) dB, extinction ratio (ER) of 29.5 (24.2) dB for TM (TE) mode is achieved at 1.55 ȝm, and its bandwidth can be enlarged to ~90 nm for ER > 18 dB (TE).
© 2018 The Author(s)
PDF ArticleMore Like This
Shijie Gong, Jifang Qiu, Ye Tian, Yan Li, Xiaobin Hong, and Jian Wu
s1943 Conference on Lasers and Electro-Optics/Pacific Rim (CLEO/PR) 2017
Ning Zhao, Yu He, Ciyuan Qiu, Yong Zhang, and Yikai Su
Su2A.132 Asia Communications and Photonics Conference (ACP) 2018
Yuxi Fang, Changjing Bao, Zhonghan Wang, Yan-ge Liu, Bo Liu, Hao Huang, Yongxiong Ren, Zhongqi Pan, and Yang Yue
C12H_3 Conference on Lasers and Electro-Optics/Pacific Rim (CLEO/PR) 2020