Institution: | a Department of Electronic Information Science and Technology, Yibin University, Yibin 644007, China b College of Electronic Engineering, Sichuan Normal University, Chengdu 610066, China c Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China d State Key Laboratory of Laser Technology (Huazhong University of Science and Technology), Wuhan 630074, China |