1. Key Laboratory of In-Fiber Integrated Optics
2. Ministry Education of China
3. and College of Physics and Opotoelectronic Engineering
4. Harbin Engineering University
5. Harbin 150001
6. State Key Laboratory of Rare Earth Resource Utilization
7. Changchun Institute of Applied Chemistry
8. Chinese Academy of Sciences
9. Changchun 130022
10. P. R. China