1. Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, People's Republic of China
2. National Demonstration Center for Experimental Physics Education, Harbin Engineering University, Harbin 150001, People's Republic of China
3. Laboratory of Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
4. Photonics Research Center, Guilin University of Electronics Technology, Guilin 541004, People's Republic of China