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稀土离子掺杂的AlF3基氟化物玻璃

张 龙 张军杰 祁长鸿 林凤英 胡和方

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稀土离子掺杂的AlF3基氟化物玻璃

张 龙, 张军杰, 祁长鸿, 林凤英, 胡和方

RARE EARTH DOPED AlF3-BASED FLOURIDE GLASS

ZHANG LONG, ZHANG JUN-JIE, QI CHANG-HONG, LIN FENG-YING, HU HE-FANG
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  • 在800和970nm LD激发下,分别研究了Er3+单掺和Yb3+,Tm3+共掺的AlF3基(AYF,AZF)玻璃中上转换发光、能量传递和浓度猝灭.在Er3+掺杂的AlF3基玻璃,随着Er3+掺杂量的增加,红光与绿光上转换发光强度比(Ired/Igreen)增加,这被认为与两个Er3+离子
    Energy transfers and upconversion fluorescence spectroscopy in both Er3+ singly doped and Tm3+-Yb3+ co-doped AlF3-based flouride glass,excited at 970nm,are investigated experimentally.In Er3+:AYF glass,the optium Er3+content for 550nm emission is about at 6mol%,which is 12mol% in AZF glass.With the increase of Er3+ content,the intensity ratio of the red emission to the green emission (Ired/Igreen) is increased in AYF and AZF glass,and the red emission intensity in these gass depends on (Pex)1.6.They are mainly due to a cross-relaxation process between two erbium ions,one in the 4S3/2 and the other in the 4I9/2.In Tm3+-Yb3+ co-doped AlF3-based flouride glass,the concentration quenching of Tm3+ in blue at 476nm is stronger than that in infrared light at 793nm,and the optimum content of Tm3+ for 476nm emission is about 0.1mol%,while it is (0.3—5)mol% for 793nm emission.The concentration quenching of Yb3+ to upconvertion fluorescence is also observed.It may be due to the back-energy transfer from the 3F4 level of Tm3+ to the 2F5/2 level of Yb3+.
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出版历程
  • 收稿日期:  1999-11-11
  • 修回日期:  2000-02-18
  • 刊出日期:  2000-04-05

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