1. Shandong Key Laboratory of Optical Communication Science and Technology
2. School of Physics Science and Information Technology
3. Liaocheng University
4. Liaocheng 252059
5. China
6. School of Resource and Environment Engineering
7. Wuhan University of Technology
8. Wuhan 430070
9. School of Physics and Electronic Engineering
10. Linyi University
11. Linyi 276005