The Er

3+

doped tellurite up-conversion laser materials have been attracted much attention due to the applications in areas such as optoelectronics

optic-communication

and color display.The up-conversion emission efficiency of tellurite glasses is low

because of the multi-phonon relaxation.A simpler way of removing the OH

-

from the glass during melting is to add a metal-fluoride to the batch and the fluoride will liberate hydrogen species from the melt.However

this process is effective in the dry air.In the humid atmosphere

water in the air can be reacted with fluoride to make the oxyfluoride tellutite glass with the residual OH

-

.So the oxyfluoride tellurite glasses prepared in different air have different OH

-

concentration.The oxyfluoride tellurite glasses with different OH

-

concentration were prepared in dry air and in humid atmosphere.The Judd-Ofelt intensity parameters and the total spontaneous emissions probabilities A

ij

(branching)ratios β

ij

and radiative lifetimes of the major emitting states of the Er

3+

ion were determined from the absorption spectrum and Judd-Ofelt theory.The OH

-

concentration of oxyfluoride tellurite glasses was studied by the Fourier transform infrared(FTIR)absorption spectra.The effect of OH

-

on green up-conversion luminescence in the Er

3+

-doped oxyfluoride tellurite glasses was studied by fluorescence decay curves and up-conversion luminescence spectra.The OH

-

concentration of oxyfluoride tellurite glass prepared in dry air is 0.017×10

-20

cm

-3

15 times lower than that of glass prepared in humid atmosphere(0.25×10

-20

cm

-3

).The Er

3+

ion

4

S

3/2

level lifetime of glass with lower OH

-

concentration is 60 μs increasing 40% than that of glass with(higher)OH

-

concentration

and the 543 nm emission intensity increases 2.4 times.The up-conversion luminescence of Er

3+

doped oxyfluoride tellurite glasses prepared in removing the OH

-

process has a great improvement.