摘要
High-performance ultra-compact polarization splitter-rotators(PSRs)are designed and experimentally demonstrated,using dual etching and a tapered asymmetrical directional coupler.First,two novel PSRs are designed with nanowire and subwavelength grating cross-port waveguides and verified in simulations.Then,one of the two PSRs is fabricated.Experiment results reveal that the extinction ratio is higher than 28 dB or 32 dB at 1550 nm for the launched fundamental transverse magnetic or the transverse electric modes,while the corresponding insertion loss and polarization conversion loss are 0.33 dB and 0.18 dB,respectively.
作者
Changjian Xie
Xihua Zou
Fang Zou
Yong Zhang
解长健;邹喜华;邹放;张永(Center for Information Photonics and Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China;State Key Laboratory of Advanced Optical Communication Systems and Networks,Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
基金
supported by the National Key Research and Development Program of China(No.2019YFB2203600)。
