Preparation And Performance Study Of Tm³⁺,Yb³⁺ Co-doped Lutetium Gadolinium Oxide Transparent Laser Ceramic

Tm,Yb:?Gd Lu?₂O₃ ceramic powders were prepared via citric acid-gel combustion method with polyethylene glycol as a dispersing agent.Tm,Yb:?GdLu?₂O₃ ceramic was synthesized by cold isostatic-vacuum sintering method.The ceramic powders were characterized by X-ray diffraction and scanning electron microscopy.The results show that the optimum conditions for ceramic powders: calcination temperature is 1000?;the value of pH is 6;the Lu³⁺ doped mole fraction of 25%;the Tm³⁺ doped mole fraction of 4%;the Yb³⁺ doped mole fraction of 5%.The results show that the nano-powder with the around average particle size of 50 nm can be obtained.The ceramic was characterized by scanning electron microscopy and the results show that the optimum conditions for ceramic: sintering temperature is 1800?;sintering time is 20h;add ethyl silicate;double sided polishing.The average transmittance of ceramic in a visable bond is 71.3% and the average transmittance in a mid-infrared bond is 70.7%.The structure of ceramic powders was characterized by X-ray diffraction.The results show that powders belong to cubic phase.The spectrum property of sample was measured and the analysis of results indicate that the sample has fluorescence peaks of blue and red lights located at 484 nm and 658 nm,which are respectively owing to the ¹G₄?³H₆ and ¹G₄?³F₄ level transitions of Tm³⁺.The luminous intensity of the sample with the different mole fraction of doping Tm³⁺ and Yb³⁺ was investigated.The results show that Tm³⁺ doped mole fractions of 4% and Yb³⁺ doped mole fractions of 5% were obtained.And furthermore the light transition mechanism was also studied.