Research On Preparation And Optical Properties Of Rare Earth Ion Doped Glass

Rare earth elements have a unique electron shell structure.The special structure makes them have many characteristics in the optical field.The diversity of energy level transitions makes them have good fluorescence characteristics,and different structures make the fluorescence characteristics of rare earth elements diverse.At present,rare earth ion-doped glasses with excellent optical properties have important development prospects in the fields of fiber lasers,fiber amplifiers,and solar cells.The 2?5?m mid-infrared fiber laser has a wide range of applications in the fields of communication,environmental monitoring,medical treatment,and national defense and military.The research of fiber laser is inseparable from the use of rare earth ion-doped glass.Luminescent glass is mainly used as the luminous center of the gain medium,and the choice of matrix material is also one of the key contents of the research.Therefore,research on the luminescence properties of rare earth ion doped glasses has long been an important topic for researchers from all over the world.In this context,this topic uses the traditional melting annealing process,selects the appropriate rare earth ion luminescence center,combines the advantages of germanate and tellurite with low phonon energy and good thermal stability of silicate,and uses it as the matrix material for preparation of rare earth doped glass.After rationally designing the formula,the preparation and research of luminescent glass are completed.Combining practical application requirements and some problems that need to be solved,the rare earth-doped luminescent glass for mid-infrared fiber lasers is selectively studied systematically.Through the energy transfer between rare earth ions,the rare earth ion doped glass Mid-infrared luminescence.The specific contents of this paper are as follows:1.Research on mid-infrared broadband fluorescence of Yb³⁺/Ho³⁺co-doped silicate-germanate glassUsing SiO₂-Ge O₂-Ca O-Nb₂O₅-Li₂CO₃-Na₂O as the matrix material,the Yb³⁺/Ho³⁺co-doped silicate-germanate glass with excellent thermally stable and optical properties was prepared by the conventional melt quenching method.The thermal performance parameter?T(134°C)>100°C shows that,compared with Yb³⁺/Ho³⁺co-doped germanate glass and Er³⁺doped tellurite glass,Yb³⁺/Ho³⁺co-doped silicate-germanate glass has better performance of the crystallization resistance and thermodynamic properties.When excited by a 980nm laser diode(LD),2.0?m emission was successfully obtained,and its half-maximum width(FWHM)was 203nm.The results show that the proper amount of Yb³⁺ion can significantly increase the emission intensity of 2.0?m,and the potential luminescence mechanism can be obtained based on the fluorescence spectrum.Therefore,the ideal thermal performance and the fluorescence emission intensity of 2.0?m indicate that Yb³⁺/Ho³⁺co-doped silicate-germanate glass is promising for mid-infrared fiber lasers and fiber amplifiers.2.Research on of Yb³⁺/Er³⁺/Ho³⁺triple-doped tellurite glass for mid-infrared fiber lasersUsing TeO₂-ZnO-La₂O₃-Li₂CO₃-Nb₂O₅ as the precursor material,the Yb³⁺/Er³⁺/Ho³⁺triple-doped tellurite glass with excellent mid-infrared fluorescence emission was prepared by the traditional melting quenching method.The thermal stability of the precursor was analyzed by DSC test,and?T(110?)showed that it has good thermodynamic properties.An X-ray diffractometer was used to detect the structure of the three-doped glass sample,and the glass system has good crystallization resistance.Under the excitation of the 980nm LD pump light source,the mid-infrared fluorescence emission in the 2.0?m and 4.1?m bands was successfully obtained,and the FWHM corresponding to the 2.0?m band was 175nm,and the FWHM corresponding to the 4.1?m band was 321nm.With the increase of Yb³⁺concentration,both 2.0?m and 4.1?m fluorescence emission were enhanced.At the same time,the fluorescence lifetimes at 2.0?m and 4.1?m were tested,?(2000nm)=4.72ms,?(4100nm)=4.26ms.The results show that Yb³⁺/Er³⁺/Ho³⁺triple-doped tellurite glass is an ideal material for mid-infrared fiber lasers.