Asymmetric directional couplers based on silicon nanophotonic waveguides and applications  

作　　者：Daoxin DAI Shipeng WANG 

机构地区：[1]State Key Laboratory for Modem Optical Instrumentation, Centre for Optical and Electromagnetic Research,Zhejiang Provincial Key Laboratory for Sensing Technologies, Zhejiang University, Hangzhou 310058, China

出　　处：《Frontiers of Optoelectronics》2016年第3期450-465,共16页光电子前沿（英文版）

基　　金：Acknowledgements We thank Dr. Jian Wang, Dr. Pengxin Chen, Dr. Xiaowei Guan, Dr. Fei Lou, Prof. Lech Wosinski, Dr. Di Liang, Prof. John Bowers, Dr. Yaocheng Shi, Prof. Sailing He, et al for their contributions and the support from the National Natural Science Foundation of China （NSFC） （Grant Nos. 11374263, 6141101056, 61422510）, the Doctoral Fund of Ministry of Education of China （No. 20120101110094）, and the Fundamental Research Funds for the Central Universities.

摘　　要：Directional couplers （DCs） have been playing an important role as a basic element for realizing power exchange. Previously most work was focused on symmetric DCs and little work was reported for asymmetric directional couplers （ADCs）. In recently years, silicon nanophotonie waveguides with ultra-high index contrast and ultra-small cross section have been developed very well and it has been shown that ADCs based on silicon-oninsulator （SOI） nanophotonic waveguides have some unique ability for polarization-selective coupling as well as mode-selective coupling, which are respectively very important for polarization-related systems and mode-division-mulitplexing systems. In this paper, a review is given for the recent progresses on silicon-based ADCs and the applications for power splitting, polarization beam splitting, as well as mode conversion/（de）multiplexing.Directional couplers （DCs） have been playing an important role as a basic element for realizing power exchange. Previously most work was focused on symmetric DCs and little work was reported for asymmetric directional couplers （ADCs）. In recently years, silicon nanophotonie waveguides with ultra-high index contrast and ultra-small cross section have been developed very well and it has been shown that ADCs based on silicon-oninsulator （SOI） nanophotonic waveguides have some unique ability for polarization-selective coupling as well as mode-selective coupling, which are respectively very important for polarization-related systems and mode-division-mulitplexing systems. In this paper, a review is given for the recent progresses on silicon-based ADCs and the applications for power splitting, polarization beam splitting, as well as mode conversion/（de）multiplexing.

关 键 词：silicon photonics asymmetric directional couplers （ADCs） polarization-division multiplexing （PDM） mode-division multiplexing （MDM） polarization beam splitter （PBSs） 

分 类 号：TN622[电子电信—电路与系统] TN25