1 Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China
2 Engineering Research Center on Visible Light Communication of Guangdong Province, Department of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China
3 Key Laboratory of Visible Light Communications of Guangzhou, Jinan University, Guangzhou 510632, China
4 Science and Technology on Reliability Physics and Application of Electronic Component Laboratory, China Electronic Product Reliability and Environmental Testing Research Institute, Guangzhou 510610, China
5 e-mail: zhuwg88@163.com