1Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University, Guangzhou 510632, China
2Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China
3Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
4School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
5State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China