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Spectroscopic properties and Judd-Ofelt theory analysis of La, Nd codoped Y2O3 high refractivity transparent ceramics

Huang Yi-Hua Jiang Dong-Liang Zhang Jing-Xian Lin Qing-Ling

Spectroscopic properties and Judd-Ofelt theory analysis of La, Nd codoped Y2O3 high refractivity transparent ceramics

Huang Yi-Hua, Jiang Dong-Liang, Zhang Jing-Xian, Lin Qing-Ling
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  • Received Date:  19 November 2008
  • Accepted Date:  22 April 2009
  • Published Online:  15 January 2010

Spectroscopic properties and Judd-Ofelt theory analysis of La, Nd codoped Y2O3 high refractivity transparent ceramics

  • 1. (1)中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海 200050; (2)中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海 200050;中国科学院研究生院,北京 100049

Abstract: Nd,La:Y2O3 nanocrystalline powder was prepared by co-precipitation method. The transparent ceramic was fabricated by vacuum sintering at 1700℃ for 4 h in vacuum. Transparent polycrystalline ceramics with uniform lanthanum distribution was obtained. The grain size was around 22 μm. No pores were found in the grain and grain boundary. The absorption spectrum and the fluorescence spectrum of the sample were measured. The highest absorption peak is centered at 821 nm and the absorption cross section is 43×10-24 m2 The main emission peak is at 1078 nm, and the fluorescence lifetime is 0287 ms. The Judd-Ofelt intensity parameter Ωλ(λ=2,4,6), spontaneous transition probability, radiative lifetime and fluorescence branching ratio of Nd3+ were calculated by Judd-Ofelt theory. The calculated emission cross section of 4F3/2→4I11/2 transition is 20×10-24 m2 It was found that the addition of La ion can change the crystalline field of yttria, which helps to obtain suitable solid laser materials.

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