Optical intensity analyses of Er3+:YAlO3

被引：0
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作者：
Sardar, Dhiraj K. [1 ]
Chandrasekharan, Sreerenjini [1 ]
Nash, Kelly L. [1 ]
Gruber, John B. [1 ]
机构：
[1] Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249-0697, United States
来源：
Journal of Applied Physics | 2008年 / 104卷 / 02期
关键词：
Analyses of the optical absorption and emission intensities are performed on Er3+ ions doped into yttrium orthoaluminate YAlO3 to assess this material as a laser source. The Judd-Ofelt model is applied to the room temperature absorption intensities of Er3+ in YAlO3 to obtain the phenomenological intensity parameters: Ω2=1. 06 10-20 cm2 Ω4=1.9610-20 cm2; and Ω6 =1.4010-20 cm2. The intensity parameters are used to determine the radiative decay rates and branching ratios of the Er3+ transitions from the upper multiplet manifolds to the corresponding lower-lying multiplet manifolds 2S+1LJ of Er3+ in YAlO3. Using the radiative decay rates; radiative lifetimes of 13 excited states have been determined. The room temperature fluorescence lifetime of the Er3+4S3/2 → 4I15/2 transition is measured to be 0.43 ms. Values of emission cross section and peak emission cross section have been obtained for the Er3+4I13/2 → 4I15/2 and 4S3/2 → 4I15/2 intermanifold transitions. The detailed structure observed in the manifold-to-manifold transitions allows us to identify the Stark splitting of the individual manifolds. © 2008 American Institute of Physics;
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