| This article discussed the preparation of Nd3+,Yb3+:Gd3Ga5O12 (Nd,Yb:GGG) laser ceramics, which will be provided as a new type of highly efficient laser material.Nd:GGG laser ceramics powder has been prepared by sol-gel method, and the structure and morphology are characterized, the results show that GGG pure phase can be obtained at 1 000℃, and the particles are uniform in size distribution (70-100nm), and It provides anproper method for the preparation of co-doped laser ceramics powder.Ultrafine powder of Nd,Yb:GGG laser ceramics has been prepared by sol-gel method and urea co-precipitation method, and the reaction mechanism and influencing factors in the experiment have been discussed. TG-DTA,XRD,Infrared spectrum,SEM,TEM electron microscopy and electron diffraction have been used to test the properties of the powder. After calcined 5h at 1000℃and 1 200℃respectively, polycrystalline GGG powder with well-distributed,small size and homogenously dispersive is obtained.Fluorescence spectrum of GGG ceramic precursor powder shows that favors a good superposition of the room temperature Nd3+ emission with the Yb3+ absorption in Nd,Yb:GGG ceramics, on electronic transitions. Combined with the cubic crystal structure of Nd,Yb:GGG, this could grant efficient Nd-to-Yb energy transfer by interionic cross [(4F3/2) Nd,(2F7/2)Yb]→[(4I9/2) Nd, (2F5/2)Yb], which is possible to achieve high efficiency laser output.
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