摘要
The energy migration interaction parameter CDD in high concentration Nd3＋ doped YAG laser crystal was estimated using the Yokota-Tanimoto（Y-T） model and the spectral overlap model（SOM） of Kushida, respectively.Firstly, the experimental luminescence decay curves of 4F3/2 state of Nd3＋ ions in YAG laser crystal at room temperature for 2.0at.% and 3.0at.% Nd3＋ concentrations reported by Mao were fitted successfully using the Y-T model, and the parameter CDD was obtained to be 1.50×10-39 cm6/s.Secondly, the parameter CDD was directly calculated using the spectral overlap model（SOM） of Kushida;CDD was calculated to be 2.73×10-39 cm6/s.By comparing the energy migration interaction parameter CDD with the energy transfer interaction parameter CDA（1.794×10-40 cm6/s）, it was concluded that the energy migration rate between Nd3＋ ions in YAG laser crystal was about 11 times larger than the energy transfer rate, and that energy migration played a very important role in high concentration Nd3＋-doped YAG laser crystal.
The energy migration interaction parameter CDD in high concentration Nd3＋ doped YAG laser crystal was estimated using the Yokota-Tanimoto（Y-T） model and the spectral overlap model（SOM） of Kushida, respectively.Firstly, the experimental luminescence decay curves of 4F3/2 state of Nd3＋ ions in YAG laser crystal at room temperature for 2.0at.% and 3.0at.% Nd3＋ concentrations reported by Mao were fitted successfully using the Y-T model, and the parameter CDD was obtained to be 1.50×10-39 cm6/s.Secondly, the parameter CDD was directly calculated using the spectral overlap model（SOM） of Kushida;CDD was calculated to be 2.73×10-39 cm6/s.By comparing the energy migration interaction parameter CDD with the energy transfer interaction parameter CDA（1.794×10-40 cm6/s）, it was concluded that the energy migration rate between Nd3＋ ions in YAG laser crystal was about 11 times larger than the energy transfer rate, and that energy migration played a very important role in high concentration Nd3＋-doped YAG laser crystal.
基金
supported by the Scientific Project of Jiangxi Education Department of China ([2007]330)
Scientific Project of Jiujiang University (05KJ01)
