Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

¹ Department of Electrical and Computer Engineering, University of California, Santa Barbara CA 93106, USA

² Department of Engineering, Aarhus University, Aarhus, Denmark

³ Aurrion Inc., Goleta CA 93117, USA

Department of Information Science and Electronics Engineering, Zhejiang University, Hangzhou 310027, China

Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

State Key Laboratory for Modern Optical Instrumentation, Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, Zhejiang University, Hangzhou 310058, China

¹ Fiberhome Telecommunication Technologies Co. Ltd, Wuhan 430074, China

² Accelink Technologies Co. Ltd, Wuhan 430074, China

¹ Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore

² A*STAR Institute for Infocomm Research (I2R), Singapore 138632, Singapore

¹ State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

² Institut National de la Recherche Scientifique - energie, Materiaux et Telecommunications (INRS-EMT) 1650 boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada

³ Microwave Photonics Research Laboratory, School of Electrical Engineering and Computer Science, University of Ottawa, ON K1N 6N5, Canada

Institut d'Electronique Fondamentale, University Paris-Sud, CNRS UMR 8622, Bat. 220, 91405 Orsay Cedex, France

Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA 92093, USA

¹ School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

² Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA

Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China