Enhanced green upconversion luminescence in Yb3+/Tb3+-codoped silica fiber based on glass phase-separated method

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• 作者：Yingbo Chu ; Yu Yang ; Lei Liao ; Yibo Wang ; Nan Zhao ; Zhao Wang…
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：120
• 期：4
• 页码：1315-1322
• 全文大小：892 KB
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• 作者单位：Yingbo Chu (1)
  Yu Yang (1)
  Lei Liao (1)
  Yibo Wang (1)
  Nan Zhao (1)
  Zhao Wang (1)
  Changbo Liu (1)
  Jinggang Peng (1)
  Haiqin Li (1)
  Nengli Dai (1)
  Jinyan Li (1)
  Luyun Yang (1)
  
  1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Optical and Electronic Materials
  Nanotechnology
  Characterization and Evaluation Materials
  Surfaces and Interfaces and Thin Films
  Operating Procedures and Materials Treatment
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630

文摘

We reported on an Yb3+/Tb3+-codoped silica fiber with a large fiber core prepared from nanoporous silica glass based on glass phase-separated method. The measured refractive index profile indicated an excellent homogeneity of the doped active fiber core. Intense green upconversion emission from Tb3+ centered at 543?nm was obtained in the Yb3+/Tb3+-codoped silica fiber under 976-nm excitation. It is suggested that the green upconversion emission is dominated by a two-photon absorption process. It is found that the Al3+ ions as a modifier can facilitate the energy transfer from Yb3+ to Tb3+ in the porous glass fiber. The energy transfer efficiency from Yb3+ to Tb3+ was calculated.