Author Affiliations

Yingjie Liu,¹ Xi Wang,¹ Yong Yao,¹ Jiangbing Du,² Qinghai Song,¹ and Ke Xu^1,*

¹Dept. Electronic Information Engineering, Harbin Institute of Technology, Shenzhen, 518055, China.

²State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China

^*Corresponding author: kxu@hit.edu.cn