ANISOTROPY OF OPTICAL ABSORPTION INTENSITY IN Tm3+ DOPED YVO4 CRYSTALS
Lin Xiu-hua (林秀华), Jiang Bing-xi (江炳熙)
Department of Physics, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China; State Key Laboratory for Infrared Physics, Chinese Academy of Sciences, Shanghai 200083, China
Abstract Seven absorption group-bands (1D2, 1G4, 3F2, 3F3, 3H4, 3H5, 3F4) of Tm3+ in YVO4 single crystals have been observed in the orientation absorption spectra recorded in the spectral range from 200 to 4000 nm at 300K. The integrated absorption cross section for each group-band was accurately evaluated. On the assumption that the anisotropy of this uni-axial crystal is small, the Judd-Ofelt theory was extended for the calculation of 4f-4f transition intensities of Tm3+ in YVO4. Two sets of phenomenological intensity parameters were derived from a least-squares-fit procedure. For c-axis cut sample we have $\varOmega$2=10.18 (10-20cm2), $\varOmega$4=1.96 (10-20cm2), $\varOmega$6=0.75 (10-20cm2).For a-axis cut sample we have $\varOmega$2=8.20 (10-20cm2), $\varOmega$4=2.47 (10-20cm2), $\varOmega$6=0.91 (10-20cm2). The anisotropy of the optical absorption intensities of Tm3+:YVO4 was theoretically analyzed in detail.
Received: 28 January 2000
Accepted manuscript online:
Fund: Project supported by the State Key Laboratory for Infrared Physics, Chinese Academy of Sciences (Grant No. 980409), and the Natural Science Foundation Committee of Fujian Province, China (Grant No. E97001), the State Key Laboratory for Physical Chemistry
Cite this article:
Lin Xiu-hua (林秀华), Jiang Bing-xi (江炳熙) ANISOTROPY OF OPTICAL ABSORPTION INTENSITY IN Tm3+ DOPED YVO4 CRYSTALS 2000 Chinese Physics 9 689
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