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Chinese Physics, 2001, Vol. 10(1): 58-64    DOI: 10.1088/1009-1963/10/1/313
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev  

FLUORESCENCE MECHANISMS OF Tm3+- AND Yb3+/Tm3+ DOPED AlF3-BASED FLUORIDE GLASS

Zhang Long (张龙), Zhang Jun-jie (张军杰), Hu He-fang (胡和方), Lin Feng-ying (林凤英)
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract  A complete set of spectroscopic parameters, including Judd-Ofelt parameters, radiative transition probabilities, radiative lifetime, branching ratios and integrated absorption cross section, have been calculated for Tm3+- doped fluoroaluminate (AYF) glass, based on the measured absorption spectra. The mechanism of Tm3+→Tm3+ and Yb3+ $\Leftrightarrow$ Tm3+ energy transfers and fluorescence properties have been investigated in both Tm3+ single-doped and Yb3+/Tm3+ double-doped AYF glasses. The cross-relaxation process, 3F4+3H6→23H4, is proved, which makes the optimum Tm3+ concentration of 1.77μm fluorescence (3H43H6) much higher than 1.45μm fluorescence (3F43H4) in Tm3+:AYF glasses. In Yb3+/Tm3+:AYF glasses, a stronger concentration quenching is found for the 476nm emission than that for the 797nm emission, and is discussed under the 970nm-excitation.
Keywords:  fluoroaluminate glass      Judd-Ofelt analysis      energy transfer      rare earth  
Received:  23 March 2000      Revised:  21 August 2000      Accepted manuscript online: 
PACS:  78.55.Qr (Amorphous materials; glasses and other disordered solids)  
  78.40.-q (Absorption and reflection spectra: visible and ultraviolet)  

Cite this article: 

Zhang Long (张龙), Zhang Jun-jie (张军杰), Hu He-fang (胡和方), Lin Feng-ying (林凤英) FLUORESCENCE MECHANISMS OF Tm3+- AND Yb3+/Tm3+ DOPED AlF3-BASED FLUORIDE GLASS 2001 Chinese Physics 10 58

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