1. Yanshan University, School of Information Science and Engineering, Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Qinhuangdao, China
2. Yanshan University, College of Science, Hebei Key Laboratory of Microstructure Materials Physics, Qinhuangdao, China
3. Northeastern University, State Key Laboratory of Synthetical Automation for Process Industries, Shenyang, China