CHEN Baojiu, KONG Xianggui, QIN WeipingWANG Haiyu, XU Wu, HUANG Shihua. A STUDY ON THE UPCONVERSION OF Tm<sup>3+</sup> AND Yb<sup>3+</sup>CODOPED IN MFT GLASS[J]. Chinese Journal of Luminescence, 1999,20(4): 300-304
CHEN Baojiu, KONG Xianggui, QIN WeipingWANG Haiyu, XU Wu, HUANG Shihua. A STUDY ON THE UPCONVERSION OF Tm<sup>3+</sup> AND Yb<sup>3+</sup>CODOPED IN MFT GLASS[J]. Chinese Journal of Luminescence, 1999,20(4): 300-304DOI:
for IR to visible upconversionwas designed; and the Raman scattering method was used to analysis of structure properties
and the process and properties of blue and red upconversion under 970urn LDexcitation was discussed.The Multi-Fluoride-Telluride glass material co-doped with Tm
3+
and Yb
3+
havebeen designed and prepared by melting method in muffle furnace at 800℃. The glasssample components are 50TeO
2
-14.9PbF
2
-10AIF
3
-10BaF
2
-10BaF
2
-10NaF-0.1Tm
2
O
3
-5Yb
2
O
3
.The Raman shift spectrum was measured with JY-T 800 Raman spectrometer under 488nm of Ar
+
laser. We observe the maximum phonon energy is 755cm
-1
in the studiedglass. Some vibrative models with narrow line width in Raman scattering spectra showthat the micro-crystals presented in the glass sample. The spectra of upconversion luminescence of Tm
3+
by Yb
3+
sensitization in the glass sample were measured with Shimadzu RF-520 fluorescence spectrometer. The very intense blue upconversion luminescence was observed by naked eyes under 970nm LD excitation. We have be prove thatthe blue upconversion luminescence from
1
G
4
-
3
H
6
transition of Tm
3+
with wavelengthof 476.6nm. The wavelength of the red upconversion luminescence originated from
3
F
3
→
3
H
6
and
1
G
4
→
3
H
4
transitions are of Tm
3+
699urn and 663nm
respectively. The bothred upconversion emissions are weaker versus blue upconversion luminescence. A studyon relationship between the LD working current and intensity of red and blue upconversion luminescence was confirmed. The relationship directs that