Yong Zhang, Yu He, Jiayang Wu, Ruili Liu, Ciyuan Qiu, Yikai Su. High-extinction-ratio and fabrication-tolerant polarization beam splitter based on grating-assisted contradirectional couplers. In Optical Fiber Communications Conference and Exhibition, OFC 2016, Anaheim, CA, USA, March 20-24, 2016. pages 1-3, IEEE, 2016. [doi]