1. Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, People’s Republic of China
2. Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices, School of Microelectronics, Hubei University, Wuhan 430061, People’s Republic of China
3. Yueyang DALU Laser Technology Co., Ltd., Yueyang 414000, People’s Republic of China