1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China
2. Hebei Key Laboratory of Advanced Laser Technology and Equipment, Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China
3. Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia
4. China Jiliang University, College of Optical and Electronics and Information Engineering, Tianjin 300401, China