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

Tm,Yb:?GdLa?₂O₃ nano-powder was prepared by a coprecipitation method with polyethylene glycol as a dispersing agent.According to the control variable method,through a series of samples of the powder was determined by X-ray diffraction and scanning electron microscopy. The results show that the optimum conditions for ceramic powders: calcination temperature was 850?;the value of pH is 7; doping mole fraction of La³⁺ is 25%; doping mole fraction of Tm³⁺ is 4%; the Tm,Yb:?GdLa?₂O₃ nano-powder with the around average particle size of 50 nm can be obtained under the optimum conditions. The features of excitation and emission spectra of Tm,Yb:?GdLa?₂O₃ ceramics at room temperature were investigated. The most intense excitation and emission peaks are centered at 360 nm and 454 nm, which are corresponding to the1D2?3H6 and1G4?3H6 level transitions of Tm³⁺.The Tm,Yb:?GdLa?₂O₃ ceramic was synthesized by cold isostatic-vacuum sintering method with TEOS as sintering aids.The ceramic samples was determined by scanning electron microscopy and transmission curve. The results show that the optimum conditions for ceramic: sintering temperature is 1750?; sintering time is 20h.Infrared Spectrum of the power has been tested. The results show that the power with a stable structure crystal phase of Tm,Yb:?GdLa?₂O₃ was verified. The transmittance rate of the sample has been tested.Upconversion Fluorescence Spectrum of the power has been tested. The pump light at a wavelength of980 nm ex-citation. The results show that twin emission peaks of Tm³⁺ were centered at 486nm?blue light?, 660nm?red light?, which are corresponding to the ¹D₂?³H₆ and ³F₂?³H₆ level transitions of Tm³⁺. In addition, the light transition mechanism was also discussed.