期刊
OPTICAL MATERIALS EXPRESS
卷 7, 期 6, 页码 1804-1812出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.7.001804
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资金
- China National Funds for Distinguished Young Scientists [61325024]
- High-level Personnel Special Support Program of Guangdong Province [2014TX01C087]
- Fundamental Research Funds for the Central Universities [2015ZP019]
- China State 863 Hi-tech Program [2014AA041902]
- National Natural Science Foundation of China (NSFC) [51472088, 61535014, 51302086]
- Science and Technology Project of Guangdong [2015B090926010]
Amorphous selenium (a-Se) core fibers with glass cladding have immediately been fabricated using the molten core method. The high aspect ratio of the a-Se core fibers and the presence of the glass cladding surrounding the Se core make it convenient to convert the a-Se core into a polycrystalline structure. It is found that the two-step thermal annealing process allows for the increase of crystal grain size and decrease of the structure defects in the Se core. Therefore, a low propagation loss of 1.5 dB/cm at 1310 nm has been realized for the polycrystalline selenium (c-Se) core optical fibers obtained by the wo-step annealing a-Se core fibers, first at a 80 degrees C low temperature annealing followed by a 207 degrees C high temperature annealing, which is much lower than that reported for c-Se core optical fibers (2.6 dB/cm). (C) 2017 Optical Society of America
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