Open AccessUp-conversion luminescence in Er3+/Yb3+-codoped Gd3Sc2Ga3O12 laser crystals
Author(s) -
罗建乔,
孙敦陆,
张庆礼,
刘文鹏,
谷长江,
吴路生,
殷绍唐
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.7712
Subject(s) - luminescence , materials science , laser , energy transfer , energy conversion efficiency , fluorescence , excitation , absorption (acoustics) , absorption spectroscopy , spectral line , analytical chemistry (journal) , optics , optoelectronics , atomic physics , chemistry , physics , quantum mechanics , astronomy , chromatography , composite material
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+.