Spectroscopic Properties Of Rare Earth Doped Tellurite Glass

Mid infrared laser has a wide range of applications in military,medical,environmental protection and remote sensing fields due to its good atmospheric penetration,biological tissue absorption and eye safety.In recent years,with the development and deepening of laser applications,the research on 1?m and 2?m laser materials is increasing,especially the high-performance laser materials of tellurite glass in laser field.In this paper,the research status of tellurite glass as laser gain working material is summarized,and the main research contents of this paper are put forward.Two groups of tellurite glass substrates with different formulations were designed.The thermal stability,structure and composition of the glass matrix were characterized and analyzed.The two kinds of glasses prepared in this paper were designed as 65TeO₂-15ZnO-20La₂O₃and60TeO₂-10ZnO-15La₂O₃-15Ba F₂.The?t of both glasses were higher than 145?,and there was no crystallization tendency.Therefore,they were good rare earth doped matrix materials.The wide band emission of Tm³⁺in tellurite glass(??=264nm),the energy transfer in Tm³⁺Ho³⁺co-doped tellurite glass,and the broadening of half maximum width(264nm?352nm)of Tm³⁺Ho³⁺co-doped tellurite glass were studied.It is confirmed that Tm³⁺can promote the absorption of pump light at 790 nm for Ho³⁺and provide a wider choice of pump source for its 2?m emission.The energy transfer process of rare earth ions and the improvement of luminescence properties of Nd³⁺including fluorescence lifetime,quantum efficiency,half height and width of luminescence are analyzed by using Nd³⁺Yb³⁺co-doped in 1?m emission band.And 1?m laser emission is obtained by building a resonator cavity.