Yb：铅锌镧碲酸盐玻璃的热学、光谱和激光性质

研究了摩尔组分为70TeO2-(20-x)ZnO-xPbO-5La2O3-2.5K2O-2．5Na2O(x=0，5，10，15，20)的新型多元铅锌镧碲酸盐激光玻璃，外掺Yb2O3为玻璃摩尔组分的1％，测试了试样的物理性质及吸收光谱、荧光光谱和荧光寿命，计算了Yb^3+的吸收截面、受激发射截面、荧光有效线宽等光谱参数，结果表明：该系列玻璃都具有良好的热学稳定性((Tx-Tg)>195℃，高于TZN玻璃(118℃))；当X=15时，样品具有较好的光谱性质：高的受激发射截面(1．25pm^2)、长的荧光寿命(

掺铒碲酸盐玻璃中的浓度猝灭机理研究

测试了掺铒碲酸盐玻璃在不同掺杂浓度下的荧光特性．根据Dexter能量转移理论计算了Er^3+在碲酸盐玻璃中发生浓度猝灭的临界距离R0及Er^3+间相互作用参数CEr-Er，并与其他基质玻璃中CEr-Er数值进行了比较．最后建立了Er^3+基于OH^-作为猝灭中心下碲酸盐玻璃中的浓度猝灭模型．

掺铒氟（卤）磷碲酸盐玻璃的上转换发光性能研究

研究了掺铒氟（卤）磷碲酸盐玻璃的吸收光谱和上转换荧光光谱，探讨了Er^2＋在氟（卤）磷碲酸盐玻璃中的上转换发光机理．在975nm激光二极管抽运下产生强烈的上转换红光及绿光。且红光的发光强度要远远大于绿光．以PbCl2取代PbF2后，红光的发光强度下降，而绿光却没有明显变化；以ZnCl2取代ZnF2达5mol％时，红光和绿光的发光强度均明显增大．

铒离子浓度对掺Er^3＋碲酸盐玻璃的Judd-Ofelt理论参数的影响

制备了四种不同铒离子掺杂浓度的碲酸盐玻璃，通过测定吸收光谱计算了吸收谱线的振子强度，根据Judd-Ofelt理论计算了不同浓度下Er^3＋离子发光光谱的强度参数Ω（i=2，4，6），计算了自发辐射电偶和磁偶跃迁概率、辐射寿命、荧光分支比等参数，讨论了Er^3＋离子浓度变化对以上这些参数的影响。测试了Er^3＋：^4I13／2→^4I15／2跃迁对应的荧光光谱和Er^3＋：^4I13／2能级荧光寿命。最后应用McCumber理论计算了玻璃中Er^3＋：^4I13／2→^4I15／2跃迁对应的受激发射截面大小

新型掺铒离子氧氟碲酸盐玻璃的光谱性质

探求新的具有优良的热学和光学性能的基质玻璃系统，是获得具有宽带宽和增益平坦的掺Er^3＋光纤放大器（EDFA）的一种有效途径。制备了一种新型氧氟碲酸盐玻璃TeO2-BaF2-LaF3，并对其热学性能和光学性质进行了测试。应用乍得-奥菲尔特（Judd-Ofelt）理论计算了Er^3＋离子的J-O理论参量和荧光寿命r。探讨了氟化物的引入对碲酸盐玻璃结构的改变的影响，并分析了其对玻璃的热学性质和光学性质的影响。实验发现，获得的氧氟碲酸盐玻璃具有优良的热学稳定性（△T=156.6C），宽的荧光半峰全宽（72nm）

碲酸盐玻璃化学稳定性的研究

利用全谱直读电感耦合等离子体原子发射光谱仪(ICP—AES)定量分析了TeO2-ZnO系统玻璃的化学稳定性，并从TeO2-ZnO系统玻璃的结构与价键理论的角度分析了水对该系统玻璃的侵蚀机理。实验结果表明，水对该玻璃系统的侵蚀过程属于连续性溶解过程，且获得该系统玻璃化学稳定性较理想组分。

掺铒碲-钨-钠玻璃基质的光谱性质研究

制备了用于离子交换法制备光波导器件的掺铒碲-钨-钠玻璃基质。应用扎得-奥菲而特(Judd—Ofelt)理论计算了玻璃样品的三个强度参量，由强度参量计算了Er^3+离子的自发跃迁几率、荧光分支比等光谱参量；应用麦克库玻(McCumber)理论，计算了Er^3+离子在1．5μm的受激发射截面，荧光测试发现Er^3+离子的荧光半峰全宽可达65nm。比较了Er^3+离子在不同玻璃基质中的光谱特性。结果表明，Er^3+离子在碲-钨-钠玻璃中具有较高的受激发射截面和较宽的荧光半峰全宽，可以用于宽带光波导器件的制备。

含Nb2O5碲酸盐玻璃的热力学稳定性和光谱性质

在掺铒碲酸盐玻璃中加入Nb2O5以提高其热力学稳定性，测试了4种掺铒碲酸盐玻璃的热力学稳定性参数及其吸收光谱、荧光光谱．应用Judd-Ofelt理论计算了玻璃的强度参数Ω(Ω2=(5．99～10．38)×10^-20cm^2，Ω4=(1．91～2．67)×10^-20cm^2，Ω=(0．92～1．28)×10～cm^2)，应用McCumher理论计算了受激发射截面．比较了不同组成对碲酸盐热力学稳定性和光谱性质的影响．实验结果表明，0．70TeO2-0．15Zn0—0．05BaO—0．10Nh2O5玻璃具有

掺铒碲酸盐玻璃的热力学稳定性和光谱性质的研究

分析了掺Er^3+碲酸盐玻璃的热力学稳定性能，研究了掺Er^3+碲酸盐玻璃的吸收和荧光光谱性质；应用Judd-Ofelt理论计算了碲酸盐玻璃中Er^3+离子的强度参数Ω(Ω2=4．79×10^-20cm^2,Ω4=1．52×10^-20cm^2，Ω6=0．66×10^-20cm^2)，计算了离子的自发跃迁几率，荧光分支比；应用McCumber理论计算了Er^3+的受激发射截面(σe=10．40×10^-21cm^2)、Er^3+离子^4I13／2→^4I15／2发射谱的荧光半高宽(FWHM=65．5nm)

掺铒碲钨酸盐玻璃及其平面波导

研制了一种用于宽带波导放大器的掺铒碲钨酸盐激光玻璃材料，对玻璃热稳定性、光谱性质进行了表征，并在其上采用离子交换法制作了平面光波导．掺铒碲钨酸盐玻璃的转变温度Tg和析品开始温度Tx分别为377．1和488．5℃；荧光半高宽为52nm；应用McCumber理论，计算得出Er^3+离子4I13／2→^4I15／2跃迁在峰值波长1532nm的受激发射截面为0．91×10^-20cm^2．不同条件下制作了在632．8nm处多模的平面光波导，通过拟合得到Ag^+离子在300℃的有效扩散系数De为2．82×10^-1

一种新型掺铒碲酸盐玻璃的光谱性质研究

研究了一种新型掺Er^3+碲酸盐玻璃的光谱性质；应用Judd-Ofelt理论计算了碲酸盐玻璃中Er^3+离子的强度参数Ω(Ω2=4．79×10^-20cm^2，Ω4=1．52×10^-20cm^2，Ω6=0．66×10^-20cm^2)，计算了离子的自发跃迁概率，荧光分支比；应用McCumber理论计算了Er^3+的受激发射截面(σe=10．40×10^-21cm^2)，Er^3+离子^4I13/2→^4I15/2发射谱的荧光半高宽(FWHM=65．5nm)及各能级的荧光寿命(^4I13/2能级为τrad

不同玻璃组分对掺铒碲酸盐玻璃 光谱性质的影响

Series of tellurite glasses were prepared by traditional melting method, the glass composition were changed and the different effects of glass modifier oxides(alkali metals and alkaline earth metal oxides) and glass intermediate (Y2O3, GeO2, Nb2O5, WO3) on the optical and spectroscopic properties of Er³⁺ doped tellurite glass were researched and compared. The infrared transmitting spectra, absorption spectra and fluorescence spectra were tested, the results showed that Nb2O5 and WO3 in the glass act as part of the body's role in the formation of the network, caused the reduction of transmitting range in infrared wavelength, which decrease the transmitting properties of tellurite glass. The introduction of high valence cationic ions, WO3 especially, can increase the FWHM of Er³⁺ for the increased polarization effect. With the decreasing of cationic field of glass modifier ions, the ion filed of the environment around Er³⁺ increased, subsequently, the role of ligand field polarization effect reduced, which makes the luminescence lifetime increase, and on the contrary the FWHM decrease monotonously.

一种宽带拉曼放大碲酸盐玻璃的拉曼散射特性

The flattening and broadening effects of Ga2O3, GeO2, P2O5 in TeO2-BaCO3-SrCO3- Nb2O5 (TBSN) glass system were studied. The results showed that P2O5 can broaden the vibration band in Raman spectra and Ga2O3, GeO2 can flatten the spectra compared with TBSN glass. And also, they can extend the main vibration band and decrease the vibration intensity of 730 cm^-1 and 780 cm^-1 nonbridging oxygen connected with Te. They also make for the decrease of flatness in 600-870 cm^-1 vibration band and GeO2 has larger effect than Ga2O3 in weakening the vibration of nonbridging oxygen.

Novel erbium-doped TeO2-based oxysulfide glasses: thermal and spectroscopic properties

Er3+-doped TeO2-based oxysulfide glasses have been prepared in argon atmosphere in carbon crucibles. The thermal analysis and spectroscopic properties of Er (3+) have been considered in terms of sulfide influence. As a function of composition, we have principally measured optical absorption, spontaneous emission and lifetime measurements. Judd-Ofelt theory was introduced to calculate bandwidth and emission cross-section. The results show the product FVMM x sigma(c) increase from 476.8 8 to 635.04 10(-21) cm(2) nm evidently with the addition of 10 mol% PbS into tellurite glass, which indicates a perfect effect on spectra property of Er3+ ions. (C) 2004 Elsevier B.V. All rights reserved.

Effect of F- ions on physical and spectroscopic properties of Yb3+-doped TeO2-based glasses

The effects of F- ions on physical and spectroscopic properties of the Yb3+ in tellurite glass system are investigated. The results show that the glass system takes on good thermal stability with the content of ZnF2 lower than 15 mol%, both the emission cross-section and the fluorescence lifetime of Yb3+ ions increase evidently which indicate that such oxyfluoride tellurite glass system is a promising laser host matrix for high power generation. FT-IR spectra were used to analyze the effect of F- ions on the structure of tellurite glasses and OH- groups in this glass system. Analysis demonstrates that addition of fluoride decreases the symmetry of the structure of tellurite glasses which increases the emission cross-section and removes the OH- groups, and which improves the measured fluorescence lifetime of Yb3+ ions. (c) 2004 Elsevier B.V. All rights reserved.