1. Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai, China
2. Key Laboratory for Micro and Nanophotonic Structures (MoE), Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai, China
3. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai, China
4. Department of Electrical Engineering, City University of Hong Kong, Kowloon, China