doped tungsten-tellurite glass (EDWTZn) is prepared
whose host compositions are WO
3
TeO
2
ZnO and Na
2
O.The differential thermal analysis shows that compared with the traditional glasses
the thermal stability of EDWTZn glass is higher.The results analyzed by McCumber theory also show that the peak stimulated emission cross section and the FWHM of EDWTZn glass around 1530nm are 9.52×10
-21
cm
2
and 86nm
respectively.As for the EDWTZn optical fiber amplifier
the results of numerical simulation show that large amplified signals can be obtained with a shorter length of fiber
and about 70nm flat gain band around 1530nm can be provided.