期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 38, 页码 9335-9339出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.07.030
关键词
Optical amplification; Quantum dots; Infrared luminescence
资金
- Natural Science Foundation of Guangdong Province [1045106410104887]
- National Natural Science Foundation of China [51072060, 50872123]
- State Key Laboratory of Precision Spectroscopy
- CAS Key Laboratory of Renewable Energy and Gas Hydrate [KLREGHy007k6]
- Fundamental Research Funds for the Central Universities [2011ZB0001]
- UIRT of Guangdong Province [S1010561040]
Silicate glasses containing PbS quantum dots (QDs) with narrow size distribution were prepared through heat treatment. Transmission electron microscopy (TEM) results show that spherical PbS QDs are densely dispersed in the glassy matrix. Using ZnS-PbO to replace PbS as precursor of PbS QDs, the size distribution of PbS QDs in glasses becomes more uniform. Tunable infrared luminescence from 1100 to 2200 nm has been obtained by controlling the glassy matrix and preparation parameters. Obvious optical amplification at communication windows of 1.55 mu m and 1.33 mu m is probed, and the PbS QDs doped glasses using ZnS-PbO as precursor exhibit larger optical amplification. The PbS QDs doped glasses with intense optical amplification are considered to be promising candidate as gain medium for broadband fiber amplifier and tunable fiber laser. (C) 2011 Elsevier B.V. All rights reserved.
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