期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 541, 期 -, 页码 323-327出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.06.092
关键词
Oxyfluoride glass ceramic; Ho3+ ions; Optical amplifiers; Infrared
资金
- National Science Foundation of China [51125005, U0934001]
- Department of Education of Guangdong Province [cxzd1011]
- Chinese Scholarship Council
Nanocrystalline LaF3 germanate glass ceramics were prepared and used as host for optically active Ho3+ ions. LaF3 crystallites precipitate by internal nucleation with sizes in the range of 7-17 nm. During crystallization, Ho3+ is incorporated into the fluoride lattice on La3+ sites, leading to reduced probability of multiphonon relaxation and, hence, significantly enhanced emissions within 1300-1440 and 14001550 nm wavelength range. Excited state absorption spectra, stimulated emission spectra and spectral gain coefficients of the (S-5(2), F-5(4)) -> I-5(5) transition indicate suitability of the material for E-band optical amplification. (C) 2012 Elsevier B. V. All rights reserved.
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