1 Heilongjiang Provincial Key Laboratory of Optoelectronics and Laser Technology, Heilongjiang Institute of Technology, Harbin 150050, China
2 School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China
3 School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, China
4 The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China
5 College of Sciences, Harbin University of Science and Technology, Harbin 150080, China
6 National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
7 Key Laboratory of Engineering Dielectric and Applications, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China
8 e-mail: Yingjieyj@163.com
9 e-mail: ZhiweiLV@hebut.edu.cn