1. College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, Fujian, PR China
2. Faculty of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049 China
3. Department of Electrical and Computer Engineering, Sungkyunkwan University, Jangan-Gu, Suwon 16419, Gyeonggi-do, South Korea
4. Fujian Prima Optoelectronics Company Ltd., Fuzhou 350000, Fujian, PR China
5. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350116, Fujian, PR China