1. Chinese Academy of Sciences, Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Bolan Avenue, Jinjiang, Fujian Province 362200, China
2. Peking University, State Key Laboratory of Advanced Optical Communication Systems and Networks, No. 5 Yiheyuan Road, Beijing 100871, China
3. Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fuzhou, Fujian 350007, China