1 Key Laboratory of Optical Fibre Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, China.
2 National Laboratory of Solid State Microstructures and, School of Electronic Science and Engineering, School of Physics and College of Engineering and Applied Sciences, Nanjing University, Nanjing, China.
3 Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA.
4 Key Laboratory for Micro-Nano Optoelectronic Devices (Education Ministry of China), School of Physics and Electronics, Hunan University, Changsha, China.
5 Research Centre for Optical Fibre Sensing, Zhejiang Laboratory, Hangzhou, China.
6 National Laboratory of Solid State Microstructures and, School of Electronic Science and Engineering, School of Physics and College of Engineering and Applied Sciences, Nanjing University, Nanjing, China. xiezhenda@nju.edu.cn.
7 Key Laboratory of Optical Fibre Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, China. yjrao@uestc.edu.cn.
8 Research Centre for Optical Fibre Sensing, Zhejiang Laboratory, Hangzhou, China. yjrao@uestc.edu.cn.
9 Key Laboratory of Optical Fibre Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, China. yaobaicheng@uestc.edu.cn.