1. Key Laboratory of In-Fiber Integrated Optics
2. Ministry of Education and College of Science
3. Harbin Engineering University
4. Harbin 150001
5. China
6. College of Materials Science and Chemical Engineering
7. Key Laboratory for Photonic and Electronic Bandgap Materials
8. Ministry of Education
9. School of Physics and Electronic Engineering
10. Harbin Normal University
11. Harbin 150025