1. Key Laboratory for Photonic and Electronic Bandgap Materials
2. Ministry of Education
3. School of Physics and Electronic Engineering
4. Harbin Normal University
5. Harbin 150025
6. Institute of Opto-electronic Materials and Technology
7. South China Normal University
8. Guangzhou
9. PR China
10. Key Laboratory of In-Fiber Integrated Optics
11. Ministry of Education and College of Science
12. Harbin Engineering University
13. Harbin 150001
14. School of Materials Science and Engineering
15. Harbin Institute of Technology
16. P. R. China