Several decades for the studies on luminescence materials doped with rare earth ions were past.The rare earth ions doped inorganic materials have been extensively applied to many fields

such as display techniques

laser medium

and fiber comunication.Most of the rare earth ions were used commercially

like Nd

3+

Er

3+

Ce

3+

and so on.The intense transitions of Tm

3+

are at blue and infrared domain

they are fitting for source of high densities optical storage and infrared communication.For this reason

the blue and infrared emissions are very important and attract many researchers to investigate.Glass materials have different characters with crystals.Glass materials are plastic so that they can be fabricated into fiber.Furthermore

the doping concentration of rare earth ions in glasses can be adjusted in broad range.Therefore

doping Tm

3+

in glass materials is very important to application. Ten gram batches of Tm

3+

doped tellurate glasses 50TeO

2

-10AlF

3

-(20-

x

/2)PbF

2

-10BaF

2

-10NaF-

x

/2Tm

2

O

3

(

x

=0 2

1 6

2

3

4)were weighed and melted in crucibles at 800℃ for 10min.The resulting glass rods were cut and polished for spectra experiments. The absorption spectra was measured by commercial electroform as light source with D330 spectrometer and R955 photomultipler tube

the signals were connected to XY plotter.The emission spectra and the fluorescence decay under 355nm excitation were measured with SPEX-1403 double grating spectrometer

and the raw data was collected and saved by PC. The intensity parameters of Ω

2

=2.83×10

-20

(cm

2

)

Ω

4

=3.21×10

-20

(cm

2

)

Ω

6

=3.96×10

-20

(cm

2

) were obtained from the J-O calculation results based on the absorption spectra. The experimental result of fluorescence decay of Tm

3+

for different concentration samples shows that

the fluorescence decay constant of

1

D

2

-

3

H

4

and

1

G

4

-

3

H

6

transitions decreased with the increasing of Tm

3+

concentration.The experimental results were coincided with Dexiter's theory about cross relaxation energy transfer.The relationship between fluorescence quantum efficiency of

1

D

2

and

1

G

4

and the concentration of Tm

3+

in MFT glasses was discussed.The transfer rate between Tm

3+

ions was calculated for sample with 4% Tm

3+

.We conclude that the cross relaxation luminescence quenches for

1

D

2

of Tm

3+

was induced by dipole dipole interactions.