1. School of Precision Instruments and Opto‐Electronics Engineering Tianjin University Tianjin China
2. Tianjin Optical Fiber Sensing Engineering Center Institute of Optical Fiber Sensing of Tianjin University Tianjin China
3. Key Laboratory of Opto‐electronics Information Technology (Tianjin University), Ministry of Education Tianjin China
4. Nanjing Forssmann Medical Technology Co. Nanjing Jiangsu China