Preparation And Porperties Characterization Of Er³⁺:YAG And Nd³⁺/Yb³⁺:YAG Laser Ceramic Nanopowder

As the new focusing point of exploring solid laser material-RE:YAG transparent laser ceramic, the synthesis of powder is the basis and key of the transparent ceramics. In this paper, Er³⁺:YAG and Nd³⁺/Yb³⁺:YAG laser ceramic nanopowder and influencing factors have been discussed. TG-DTA, XRD, IR, TEM and spectral analysis have been used to study structure, morphology and spectral properties of nanopowder.The results was shown that YAG pure phase at 900℃can be obtained by sol-gel combustion method, and the particles are uniform in size distribution (60-100nm) with good dispersivity and flowing property. Results was indicated that powder performance was affected by many factors such as component oxide ratio, complex agents, pH value, reactive time and temperature, heat treatment time and temperature and so on.Absorption and fluorescence emission spectra of Er³⁺:YAG and Nd³⁺/Yb³⁺:YAG laser ceramic nanopowder were studied. Er³⁺: YAG powder have achieved ⁴I_11/2→⁴I_13/2 level laser transition of 2.94μm under excitation by 980nm LD. Nd³⁺→Yb³⁺ energy transfer of Nd³⁺ /Yb³⁺:YAG achieved Yb³: ²F_5/2→² F_7/2 emission under excitation by 808nm LD. Visible light of 597, 690, 757nm be observed at Nd³⁺/Yb³⁺:YAG under excitation by 980nm LD.These research provide a new research direction for laser material.