Sm3+ effects in the Tm3+ doped tellurite glass for S-band amplification

Thulium doped Samarium codoped tellurite-tungstate glasses were produced. Luminescence properties in the infrared region were investigated looking to observe improved properties for S-band amplification in the co doped samples. Thulium is well-known by the 3 H 4 - 3 F 4 radiative transition emitting around ~1.47μm, which is a self-terminating transition in tellurite hosts due the longer lifetime of the lower level in relation to the upper level of this transition. Analysis of absorption and emission spectra showed that we could quench the 3F4 level significantly, what improved the intensity of the emission at 1.49μm. However, the state 3 H 4 were also quenched due the cross relaxation process due the absorption bands of Sm 3+ around 1.5μm.