%0 Journal Article
%T Mid-infrared Luminescence Properties of Tm~(3+) and Ho~(3+) Co-doped Fluorogermanate Glasses<br>Tm~(3+)和Ho~(3+)双掺氟锗酸盐玻璃的中红外发光性质
%A WANG Yong-chao
%A XIA Hai-ping
%A LIN Qiong-fei
%A ZHANG Jian-li
%A ZHANG Qin-yuan
%A <br>王勇超
%A 夏海平
%A 林琼斐
%A 章践立
%A 张勤远
%J 光子学报
%D 2010
%I 
%X Fluorogermanate glasses with the compositions of 65GeO_2-12AlF_3-10BaF_2-8Li_2O-5La_2O_3 codoped with Tm~(3+) and Ho~(3+) ions are fabricated by conventional melting method.According to the Judd-Ofelt theory,the J-O strength parameters(Ω_2,Ω_4,Ω_6)of Ho~(3+) are calculated,by which the radiative transition probabilities,fluorescence branching ratios and radiative lifetimes are obtained.According to McCumber theory,the absorption and emission cross-sections corresponding to the ~3H_6→~3F_4 transition of Tm~(3+) and the ~5I_8→~5I_7 transition of Ho~(3+)(at 2.0 μm)are obtained,and respective gain cross section spectra are computed as a function of population inversion.With 808 nm LD excitation,the cross-relaxation process of Tm~(3+) and infrared emission spectra of Tm~(3+) sensitized Ho~(3+) ions are studied.The results indicate that the energy transfer efficiency of Tm~(3+)(3F_4)→Ho~(3+)(5I_7)ions is enhanced and the infrared fluorescence intensity at ～2.0 μm is increased as the Ho~(3+) co-doped into glass.
%K Tm3+
%K Ho3+ doubly-doped<br>Tm3+
%K Ho3+双掺
%K 锗酸盐氟氧化物玻璃
%K 红外发射光谱
%K 能量转移
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=BC3532A5F94AA3FD680BBBAD93B9DE98&yid=140ECF96957D60B2&vid=7C3A4C1EE6A45749&iid=0B39A22176CE99FB&sid=F50A8B5513721E1C&eid=AF507FDD66D991DA&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=6