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碲酸盐玻璃由于独特的光学性质在光通讯领域具有潜在的应用价值,如掺铒光纤放大器和非线性光学器件,因而得到广泛的关注。近几年,国内外为了提高碲酸盐玻璃的机械性质和光学性能而采取了玻璃的微晶化处理,希望得到碲酸盐玻璃陶瓷。对几种碲酸盐玻璃系统进行了热力学分析,研究比较了其析晶性能,并结合已见报道的文献论证了有望做出玻璃陶瓷的碲酸盐玻璃系统。 相似文献
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报道了钨碲酸盐玻璃系统TeO2-ZnO-Na2O-WO3 和钨铌碲酸盐玻璃系统TeO2- ZnO-Na2O-Nb2O5-WO3抗析晶热稳定性和拉曼光谱特性. 实验研究了掺杂WO3和Nb2O5对碲酸盐玻璃抗析晶热稳定性和拉曼光谱特性的影响, 并分析讨论了掺杂碲酸盐玻璃拉曼谱带展宽机制. 结果表明, 掺杂WO3和Nb2O5较大地提高了碲酸盐玻璃的抗析晶热稳定性, 钨铌碲酸盐玻璃最大抗析晶热稳定性ΔT达154℃. 拉曼光谱研究表明,WO3和Nb2O5的加入使碲酸盐玻璃在921和862cm-1附近出现特征谱带, 导致拉曼光谱中高频移区从550cm-1延伸扩展到950cm-1, 从而有效地拓宽了碲酸盐玻璃的拉曼带宽, 钨铌碲酸盐玻璃最大拉曼光谱半高宽可达355cm-1. 实验研究表明,钨铌碲酸盐玻璃是宽带拉曼光纤放大器的候选材料之一. 相似文献
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研究了Tm3 /Yb3 共掺碲酸盐玻璃的Raman光谱、红外光谱和上转换发光光谱,分析了OH-对Tm3 上转换发光的影响。结果表明,氧氯碲酸盐玻璃的声子能量高于氧氟碲酸盐玻璃的声子能量,但是Tm3 /Yb3 共掺氧氟碲酸盐玻璃的上转换发光强度高于Tm3 /Yb3 共掺氧氯碲酸盐玻璃。分析认为这主要是由于OH-的影响,在氧氟碲酸盐玻璃中OH-的浓度较低,导致Tm3 的荧光寿命高,从而提高Tm3 的上转换发光。在一定程度上,OH-对Tm3 上转换发光的影响大于声子能量对Tm3 上转换发光的影响。研究结果有助于进一步提高Tm3 的发光效率。 相似文献
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制备了TeO2-BaO(Li2O,Na2O)-La2O3掺铒碲酸盐玻璃系统,测量玻璃的密度、折射率和DSC曲线,以及玻璃的吸收光谱和荧光光谱.由测得的密度和折射率等参数,应用Judd-Ofelt理论和McCumber理论,计算出碲酸盐玻璃的各光学性能参数与受激发射截面.且从测得热稳定性能较好的TBLE3荧光发射谱图中得到该碲酸盐玻璃荧光半高宽(FWHM)为~60nm,σepeak×FHWM值高达~600,明显大于掺铒硅酸盐玻璃和磷酸盐玻璃,表明该种碲酸盐玻璃是光纤发大器用的理想基质材料. 相似文献
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报道了钨碲酸盐玻璃系统TeO2-ZnO-Na2O-WO3 和钨铌碲酸盐玻璃系统TeO2- ZnO-Na2O-Nb2O5-WO3抗析晶热稳定性和拉曼光谱特性. 实验研究了掺杂WO3和Nb2O5对碲酸盐玻璃抗析晶热稳定性和拉曼光谱特性的影响, 并分析讨论了掺杂碲酸盐玻璃拉曼谱带展宽机制. 结果表明, 掺杂WO3和Nb2O5较大地提高了碲酸盐玻璃的抗析晶热稳定性, 钨铌碲酸盐玻璃最大抗析晶热稳定性ΔT达154℃. 拉曼光谱研究表明,WO3和Nb2O5的加入使碲酸盐玻璃在921和862cm-1附近出现特征谱带, 导致拉曼光谱中高频移区从550cm-1延伸扩展到950cm-1, 从而有效地拓宽了碲酸盐玻璃的拉曼带宽, 钨铌碲酸盐玻璃最大拉曼光谱半高宽可达355cm-1. 实验研究表明,钨铌碲酸盐玻璃是宽带拉曼光纤放大器的候选材料之一. 相似文献
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Nd:碲酸盐玻璃的光谱和激光性质 总被引:2,自引:0,他引:2
对比了各种激光玻璃的光谱性质,指出碲酸盐玻璃是一咱理想的激光介质,并资产在室温下实现了钛宝石激光器泵浦了Nd:碲酸盐块体玻璃的激光发射,激光阈值4.20mJ,斜率效率14.7%。 相似文献
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TeO2-Nb2O5系统玻璃的成玻性能研究 总被引:2,自引:0,他引:2
TeO2是一种线性和非线性光学性能优良、但无法单独形成玻璃的重金属氧化物玻璃系统,Nb2O5的引入有利于获得均匀而稳定的碲酸盐系统玻璃.研究发现,Nb2O5的引入会改变TeO2-Nb2O5系统玻璃中Te4 、Nb5 的配位数,进而对玻璃的结构和成玻能力、稳定性以及析晶性能均产生明显的影响.含有20-30wt%Nb2O5的碲酸盐系统玻璃表现出较好的综合品质. 相似文献
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Junjie ZHANG Shixun DAI Shiqing XU Guonian WANG Liyan ZHANG Lili HUShanghai Institute of Optics Fine Mechanics Chinese Academy of Sciences P. O. Box - Shanghai China 《材料科学技术学报》2004,20(5):527-530
In this work, a new TeO2-BaO-BaF2-La2O3-LaF3 oxyfluorotellurite glass system is investigated. Differential thermal analysis (DTA) and structural analysis by Raman scattering spectra are reported on the glasses. The DTA results indicated that an increase of fluoride content in the glasses decreases the glass transition temperature (Tg) and increases the crystallization onset temperature (Tx). As a result the 70TeO2·20BaF2·10LaF3 glass showed a large Hruby's parameter, possessing excellent thermal stability. Changes in glass network structure with fluoride content are discussed based on the Raman scattering spectra of glasses. The glass network structures in the 70TeO2·(20-x)BaO·xBaF2·(10-y)La2O3·y1 aF3 glasses are basically composed of both Te(O, F)4 and Te(O, F)3 units, but the Te(O, F)4/Te(O, F)3 ratio in the glass becomes higher with increasing fluoride content. This may be considered one of the reasons why the 70TeO2·20BaF2·10LaF3 glass exhibits excellent thermal stability. 相似文献
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\(\hbox {TeO}_{2}\)-based glasses with a general formula \(65\hbox {TeO}_{2}{-}5\hbox {BaF}_{2}{-}30\hbox {ZnF}_{2}\) (TBZ) (in mol%) were prepared by usual melt quenching technique. Three mol% of europium (Eu) or erbium (Er) were added to the prepared glass at the expense of \(\hbox {TeO}_{2}\). Raman, photoluminescence (PL), UV–visible absorption studies were carried out on the glass samples. Raman spectra of the undoped and doped glasses were analysed using the peak shift and the intensity variation along with full width at half-maximum (FWHM). It was found that Eu-doped TBZ glass has a greater tendency towards depolymerizing the glass matrix by influencing the conversion of \(\hbox {TeO}_{4}\) to \(\hbox {TeO}_{3}\) units compared to Er-doped and undoped glasses. PL spectra of the glass samples show emission due to different possible transitions. Position of the peak of the de-convoluted spectra shows the position of the particular Stark component and the FWHM is a measure of the inhomogeneous broadening. The UV–visible absorption spectra are used to calculate the optical density and to determine the band edge of the glass samples by fitting to the Mott equation. It is seen that Eu-doped TBZ glass has a lesser bandgap than that of Er-doped glass. 相似文献
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Preparation, characterization by X-ray diffraction, differential scanning calorimetry, X-ray photoelectron spectroscopy (XPS), Raman and Fourier transform–infrared (FT–IR) spectroscopy and electrical conductivity studies have been carried out on the yAg2O · (1–y) [xWO3·(1–x) TeO2] glass system. The compositional variation of the glass transition temperature and the calculated oxygen packing density values have been correlated. The conductivity at ambient temperature shows two maxima for the compositions corresponding to y = 0.30 and 0.40 at x = 0.2 and 0.4, respectively. The observed conductivity enhancement is about an order of magnitude and it is correlated to the structural modifications due to the WO3 incorporation into the TeO2 glass network. From the XPS spectra, the binding energies (BEs) of the Ag 3d, Te 3d, W 4f and O 1s core-levels have been determined. The O 1s spectrum is found to consist of two peaks due to the presence of Te–eqOax–Te, W–O–W, W–O, Te = O, Te–O–1 and W–O–1 oxygen species. The tungsten ions appear to exist in 5+ and 6+ oxidation states in these glasses. The proportion of the reduced tungsten ion is found to decrease with an increase in the WO3 concentration, while that of the Te–eqOax–Te species decreases as x increases. The FT–IR and Raman spectra of these samples reveal that the glass network consists of TeO4, TeO3, WO4 and WO6 polyhedra. 相似文献
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Crystallization behavior of the glass system AlF3-MgF2-CaF2-SrF2-BaF2-YFa-TeO2 (AMCSBY-TeO2) was studied by the nonisothermal method using differential thermal analysis. The activation energy E and Avrami exponent g were determined by nonisothermal method. It is found that the value of E varies with increasing TeO2 and reaches a minimum at 10 mol fraction TeO2, while g decreases from 3.65 to 1.78 with the addition of TeO2. X-ray diffraction shows that Ba2TeaOs, MgTe205, and SrTeOa phase formed when the glasses were reheated. The addition of TeO2 changes the crystallization mechanism and improves the stability of the fluoroaluminate glass. 相似文献
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Jiacheng LP Shunguang LI Hefang HU Fuxi GANShanghai Institute of Optics Fine Mechanics Chinese Academy of Sciences P.O.Box - Shanghai China 《材料科学技术学报》2004,20(2):139-142
The YbS /Er3 doped TeO2-WO3-ZnO glasses were prepared. The absorption spectra, emission spectra and fluorescence lifetime of Era at 1.5μm, excited by 970 nm were measured. The influence of Er2Oa, Yb2Oa and Ohcontents on emission properties of Era at 1.5 μm was investigated. The optimum doping concentrations for Era and Yba is around 3.34× 1020 ions/cma and 6.63×1020 ions/cma, respectively. The peak emission cross section is 0.83~0.87 pm2. With the increasing concentration of Yba , the FWHM of Era emission at 1.5 μm in the glass increases from 77 nm to 83 nm. The results show that Yba /Era doped meO2-Woa-ZnO glasses are promising candidate for Era -doped broadband optical amplifier. 相似文献
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Dorina Rusu 《Materials Research Bulletin》2008,43(7):1724-1730
xFe2O3·(100 − x)[Bi2O3·CdO] system with 0 ≤ x ≤ 50 mol% was prepared and investigated by X-ray diffraction, density, FT-IR and Raman spectroscopies. The XRD patterns confirm the formation of a vitreous structure for x < 35 mol% Fe2O3. The evolution of density and molar volume with the addition and increasing of iron content indicates structural changes in the structure of Bi2O3·CdO glass matrix. The FT-IR spectrum of the glass matrix reveals a structure realized from BiO3 pyramidal and BiO6 octahedral units. With the addition of iron the structure proposed by the glass matrix is changing by the appearance of FeO4 units. Also the existence of FeO6 units cannot be excluded. The Raman spectra suggest a structure build from BiO6 octahedral units. By Raman scattering the presence of structural units characteristic to Fe2O3 was not directly observed but the evolution of the spectra is dependent of the iron content. 相似文献
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在研制的Er3+/Ce3+共掺低声子能量碲酸盐玻璃(TeO2-Bi2O3-TiO2)中,分别引入高声子能量WO3、SiO2和B2O3氧化物组分,测试了玻璃样品400~1700 nm范围内的吸收光谱、1.53μm波段荧光谱、Er3+离子荧光寿命和拉曼光谱,结合McCumber理论计算了Er3+离子光谱参数.结果表明:高声子能量氧化物组分的引入,能使声子参与的Er3+/Ce3+离子间能量传递过程变得更为有效,增加了Er3+离子亚稳态能级4I13/2上粒子数积累,从而增强1.53μm波段荧光发射.另外,高声子能量氧化物组分的引入还可以增加荧光半高宽(FWHM)和带宽品质因子(σe×FWHM).研究结果对于获取具有优异光谱特性的掺Er3+光纤放大器(EDFA)的玻璃基质具有实际意义. 相似文献
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The glass-forming region of the BiO1.5—PbO—CuO system has been determined by the melt-quenching technique. The glass transition temperatures, Tg, and the first crystallization peak temperatures, Tx1, are around 240°C and 285°C, respectively. The glass structure consists of [BiO3] and [BiO6] units, and the conversion between these polyhedra mainly depends on the CuO and PbO content. The covalent characteristic in the infrared absorption spectra of the [PbOn] pyramidal units becomes significant when the glass contains more PbO. 相似文献