Department of Optics, Shandong University, Jinan 250100, China

Center for Broadband Optical Networking Technology,Shanghai Jiao Tong University, Shanghai 200030, China

The State Key Laboratory of Precision Measurement Technology and Instrument,Dept.of Precision Instruments, Tsinghua University, Beijing 100084, China

¹ Institute of Modern Optics, Nankai University, Tianjin 300071, China

² Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong

³ Department of Electronic Engineering and Applied Physics Aston University, Birmingham B4 7ET, U. K.

Key Laboratory of the Atmospheric Optics, Institute of Optics & Electronics,The Chinese Academy of Sciences, Chengdu 610209, China

¹ Department of Physics,Yantai Teachers′ University,Yantai 264025,China

² Department of Electrical and Electronic Engineering, University College London,UK

State Key Laboratory of Applied Optics, Changchun Institute of Optics,Fine Mechanics and Physics, The Chinese Academy of Sciences, Changchun 130022, China

Center of Photon Technology, Nankai University, Tianjin 300071, China

Department of Physics, Xiangtan University, Hunan 411105, China

Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences, Shanghai 201800, China

Department of Physics, Soochow University, Suzhou 215006, China

Physics Department, Sichuan University, Chengdu 610064, China

The Dept. of Electronic Engineering, Xiamen University, Xiamen 361005, China

Laser Life Science Institute, South China Normal University, Guangzhou 510631, China

¹ Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China

² Department of Physics, Xuzhou Normal University, Xuzhou 221009, China