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Comparative study of spectroscopic properties of Er^3+/Yb^3+-codoped tellurite glass and fibres under 980nm excitation* 下载免费PDF全文
A tellurite fibre of TeO_{2}-ZnO-La_{2}O_{3}-Li_{2}O glass codoped with 20000 ppm ytterbium and 5000 ppm erbium was fabricated by the suction casting and rod-in-tube technologies. The absorption spectrum of Er^{3+}/Yb^{3+} -codoped bulk glass has been measured. From the Judd-Ofelt intensity parameters, the spontaneous emission probability and radiative lifetime τ_{rad} of Er^{3+}:{}^{4}I_{13/2}→{}^{4}I_{15/2} transition for the bulk glass have been calculated. The emission fluorescence spectra and lifetimes around 1.5μm, and subsequent upconversion fluorescence in the range of 500-700nm were measured in fibres and compared with those in bulk glass. The changes in amplified spontaneous emission with fibre length and pumping power was also measured. It was found that the emission spectrum from erbium in fibres is almost twice as broad as the corresponding spectrum in bulk glass when pumped at 980nm. 相似文献
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Er3+-doped heavy metal borosilicate glasses were prepared using conventional melting and quenching method. The emission spectra of 4I13/2 → 4I15/2 transition were observed upon excitation at 974 nm and the lifetime of 4I13/2 level of Er3+ was measured. Based on these data, the fluorescence properties of Er3+ are investigated on the emission and gain characteristics at the 1.5 μm bands. In particular, the effect of relative heavy metal content on fluorescence properties is discussed. 相似文献
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掺铒碲基光纤放大器最新研究进展 总被引:1,自引:0,他引:1
掺铒碲基光纤放大器(EDTFA)由于能同时在C L波段(1530-1610nm)或L波段(1580-1620nm)对光信号进行有效的放大,目前已成为通信领域内竞相开发的一种新型宽带光纤放大器,为此简单介绍了该放大器的研究历程,综述了其最新研究进展和应用情况。 相似文献
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测量了不同Yb3+ 离子掺杂浓度下 ,Er3+ /Yb3+ 共掺SiO2 Al2 O3 La2O3玻璃的吸收光谱、荧光光谱和Yb3+离子2 F5/ 2 的能级寿命 ,应用迈克康伯 (McCumber)理论计算了Er3+ 的受激发射截面σemi,讨论了Yb3+ 离子浓度对其自身吸收性质、Er3+ 离子发光性质 ,以及Yb3+ →Er3+ 能量传递效率 (η)的影响 ,初步探明该基质玻璃中Yb3+ 离子掺杂数浓度的最佳范围为 3 .94× 1 0 2 0 cm- 3至 5 .92× 1 0 2 0 cm- 3,在此掺杂范围内 ,Yb3+ 离子的最大吸收系数为9.8cm- 1 ,Er3+ 的峰值发射截面和Yb3+ →Er3+ 能量传递效率 (η)分别为 0 64× 1 0 - 2 4 m2 和 92 %。 相似文献
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测试了不同掺杂浓度和不同厚度下Yb3+磷酸盐玻璃的吸收光谱、荧光光谱和荧 光寿命,计算了积分吸收截面、吸收截面、受激发射截面、自发辐射寿命以及荧光有效线宽等光谱参数,讨论了荧光俘获效应对Yb3+磷酸盐玻璃光谱性质的影响.结果表明荧光俘 获效应随样品厚度和掺杂浓度的增加而增大.由于荧光俘获效应的存在使得测量的Yb3+磷酸盐玻璃荧光寿命明显长于计算的荧光寿命,在0.2mol%Yb2O3低掺 杂浓度下
关键词:
荧光俘获
掺镱磷酸盐玻璃
荧光光谱 相似文献
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用于WDM系统的掺稀土玻璃光纤 总被引:2,自引:0,他引:2
作为新的光纤放大器增益介质,掺稀土玻璃光纤近年来在WDM传输系统中发展迅速。在介绍了玻璃光纤用作光纤放大器增益媒质优点的基础上,综述了目前掺稀土玻璃光纤研究的要点、种类、性能及其应用实例。 相似文献
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Multi—Rare—Earth Ions Codoped Tellurite Glasses for Potential Dual Wavelength Fibre—Optic Amplifiers 下载免费PDF全文
A novel co-doping method of multi-rare-earth (RE) ions was demonstrated in tellurite glasses for fibe amplifiers.Fluorescence emissions at both 1.53 and 1.63μm communication windows were firstly observed from Er^3 /Yb^3 /Tm^3 -codoped tellurite glasses under a single wavelength pumping at 980nm.The full width at half maximum of fluorescence at 1.53 and 1.63μm are 55nm and 50nm,respectively.This codoping method of three RE ions could be applied to other low photon energy glasses,which would be possibly used for potential dual wavelength fibre-optic amplifiers to broaden the communication windows. 相似文献
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We have prepared Er^3 -doped borotellurite glasses using conventional melting and quenching method.The absorption spectrum analysis is performed on the basis of Judd-Ofelt theory.The effects of B2O3 on the spectroscopic parameters such as intersity parameters,line strengths of electric-dipole transitions,and sopontaneous emission probability are discussed. 相似文献
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