Judd-Ofelt光谱分析理论

对Judd-Ofelt光谱分析理论(J-O理论)的发展和应用进行了综述。J-O理论用于分析固体中的稀土离子的吸收、发射光谱，可计算它们的跃迁几率、谱线强度、能级寿命、发射截面等。在J-O理论中考虑J混合后，可使理论和实验结果更好地吻合。采用改进的J-O理论，可较好地对Pr3+光谱进行分析。由TPM方法，可用非极化光透射光谱来分析各向异性晶体的光谱性质，并且对样品的加工无特殊定向要求。对于重叠吸收光谱带，拟合J-O参数时可以近似为一个带进行处理。利用荧光寿命也可对J-O参数进行计算。

Judd-Ofelt Spectral Theory

In this article, the development and application of Judd-Ofelt spectral theory(J-O theory) was reviewed briefly. J-O theory was used to analyze the absorption and emission spectra of rare earth ions in solids, and compute their transition probabilities, line strengths, energy lifetimes, emission cross sections, and so on. When J-mixing was considered in J-O theory, the theoretical and experimental results were more consistent. The spectra of Pr 3+ can be analyzed relatively accurately with modified J-O theory. The spectral properties of anisotropic crystal can be analyzed from the unpolarized-light transmission spectrum of a quadratic sample without special-orientation processing. The overlapped absorption bands can be treated as one band approximatively. The J-O parameters can also be calculated with fluorescence lifetimes.