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Up-conversion luminescence in Er3+/Yb3+-codoped Gd3Sc2Ga3O12 laser crystals

Luo Jian-Qiao Sun Dun-Lu Zhang Qing-Li Liu Wen-Peng Gu Chang-Jiang Wu Lu-Sheng Yin Shao-Tang

Citation:

Up-conversion luminescence in Er3+/Yb3+-codoped Gd3Sc2Ga3O12 laser crystals

Luo Jian-Qiao, Sun Dun-Lu, Zhang Qing-Li, Liu Wen-Peng, Gu Chang-Jiang, Wu Lu-Sheng, Yin Shao-Tang
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  • Er3+/Yb3+:Gd3Sc2Ga3O12 and Er3+:Gd3Sc2Ga3O12 crystals have been grown by Czochralski method. The absorption spectra from 320 to 1700nm and the up-conversion fluorescence spectra from 500 to 750nm of them were investigated at room temperature, respectively. The possible up-conversion luminescence mechanisms in Er3+/Yb3+-codoped crystals and their influences on the 2.8μm laser emission were discussed. Experimental results show that the absorption of Er3+:Gd3Sc2Ga3O12 around 966nm and its bandwidth are remarkably increased by Yb3+ sensitizing. Under 940nm excitation, the up-conversion luminescence intensity of Er3+/Yb3+:Gd3Sc2Ga3O12 is much stronger than that of Er3+:Gd3Sc2Ga3O12. It demonstrates that there exist effective energy transfer processes between Yb3+ and Er3+, and the dominant mechanism of up-conversion may be the energy transfer processes of Yb3+-Er3+ and Er3+-Er3+.
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Publishing process
  • Received Date:  27 May 2008
  • Accepted Date:  10 June 2008
  • Published Online:  05 June 2008

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