Open AccessRARE EARTH DOPED AlF3-BASED FLOURIDE GLASS
Author(s) -
Long Zhang,
Junjie Zhang,
Qi Chang-Hong,
Fang Lin,
Haoran Hu
Publication year - 2000
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.49.1620
Subject(s) - photon upconversion , materials science , analytical chemistry (journal) , doping , excited state , quenching (fluorescence) , ion , emission intensity , fluorescence , emission spectrum , thulium , atomic physics , optics , chemistry , spectral line , physics , optoelectronics , organic chemistry , chromatography , astronomy
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 Er3content 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 (ex)1.6.They are mainly due to a cross-relaxation process between two erbium ions,one in the 43/2 and the other in the 49/2.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 34 level of Tm3 to the 25/2 level of Yb3.