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Effects of Nb2O5 on thermal stability and optical properties of Er3+-doped tellurite glasses 下载免费PDF全文
Er3+-doped tellurite glasses with molar compositions of
xNb2O5-(14.7-x)Na2O--10ZnO--5K2O--10GeO2--
60TeO2--0.3Er2O3
(x=0, 3, 5, 7 and 9) have been investigated for developing 1.5~μm
fibre and planar amplifiers. The effects of Nb2O5 on the thermal stability
and optical properties of Er3+-doped tellurite glasses have been discussed.
It is noted that the incorporation of Nb2O5 (x=5) increases the thermal
stability of tellurite glasses significantly. Er3+-doped niobium tellurite
glasses exhibit a large stimulated emission cross-section (7.2\times 10-21-
10.7×10-21~cm2 and the gain bandwidth, FWHM×\sigmae^{\rm peak} (274\times 10-28 - 480×10-28~cm3), which are
significantly higher than that of silicate and phosphate glasses. In addition, the
intensity of upconversion luminescence of the Er3+-doped niobium tellurite
glasses decreases rapidly with increasing Nb2O5 content. As a result,
Er3+-doped niobium tellurite glasses might be a potential candidate for
developing laser or optical amplifier devices. 相似文献
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稀土发光材料在固体白光LED照明中的应用 总被引:25,自引:0,他引:25
固体白光发光二极管将成为21世纪新一代的节能光源. 要实现白光发射的重要途径之一是利用稀土发光材料的荧光转换技术, 把InGaN半导体管芯发射的460 nm蓝光或400 nm近紫外光转换成白光. 分别就这两种管芯报道了我们研制的发射蓝、绿、黄、红等不同颜色的稀土发光材料: YAG:Ce, Ca1-xSrxS:Eu^2+, Ga2S3:Eu^2+, MGa2S4:Eu^2+(M=Ca, Sr, Ba), SrGa^2+xS4+y:Eu^2+, (Ca1-xSrx)Se:Eu^2+, SrLaGa3S6O:Eu^2+, (M1, M2)10(PO4)6X2, (M1=Ca, Sr, Ba; M2=Eu, Mn; X=F, Cl, Br), NaEu0.92Sm0.08(MoO4)2, 并报道了由它们制成的白光发光二极管的色坐标、相关色温和显色指数等参数. 相似文献
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在还原气氛保护下利用高温固相法合成了化学组分为(M1,M2)10(PO4)6X2(M1=Ca,Sr,Ba;M2=Eu,Mn;X=F,Cl,Br)的可被紫光激发的蓝光、绿光和红光荧光粉,制备了紫光LED芯片+蓝光荧光粉+YAG荧光粉的二基色白光LED;紫光LED芯片+蓝光荧光粉+红光荧光粉的二基色白光LED,以及紫光LED芯片+蓝光荧光粉+绿光荧光粉+红光荧光粉的三基色白光LED。测试了所有制备的白光LED在不同的直流电驱动下的色度坐标、相关色温和显色指数。 相似文献
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