1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
2. Laboratory of Electric Power Intelligent Sensing Technology and Application, State Grid Smart Grid Research Institute Company Ltd., Beijing, China
3. Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, USA
4. Department of Materials Science and Engineering, Clemson University, Clemson, SC, USA