1. State
Key Laboratory of High Power Semiconductor Lasers, School of Science, Changchun University of Science and Technology, 7089 Wei-Xing Road, Changchun 130022, People’s Republic of China
2. Department
of Electrical and Electronic Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, People’s Republic of China
3. Changchun
Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, People’s Republic of China