掺铒铝硅酸盐和低硅钙铝硅酸盐玻璃的光谱性质研究
文献类型：学位论文
| 作者 | 张德宝 |
| 学位类别 | 博士 |
| 答辩日期 | 2005 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 胡丽丽 |
| 关键词 | Er3＋共掺 铝硅酸盐 玻璃 光谱性质 |
| 其他题名 | Spectroscopic Properties of Er~(3+)-doped Aluminosilicate Glasses and Low Silica Calcium Aluminosilicate Glasses |
| 中文摘要 | 现代光通信对集成有源器件的需求以及固体激光器的小型化、集成化发展趋势驱动了掺饵集成波导（光纤、平而）放大器以及微片激光器的发展：为了在较短的激光介质中获得足够高的增益，波导放大器以及激光器的基质材料必须是高浓度稀土离子掺杂。然而高浓度掺杂往往会引起强烈的浓度淬灭，这是目前影响玻璃基放大器发展的主要障碍。因此寻求低浓度淬灭的高浓度稀土离子掺杂的玻璃系统是目前发展玻璃基波导放大器介质材料的一个重要课题。本论文主要是围绕研究掺饵铝硅酸盐和低硅钙铝硅酸盐玻璃的光谱性质，希望通过玻璃组分的优化，制备工艺的改进，实现饵玻璃光谱性质和性能的优化。本文首先在引言中概括了掺饵铝硅酸盐和低硅钙铝硅酸盐玻璃的研究目的和意义，随后在文献综述中简单地介绍了掺饵玻璃的物理荃础和几种常用的稀土掺杂激光玻璃研究进展。同时介绍了平而光波导放大器的制作方法和进展，在此基础上确定了本文的研究思路。在论文的第二章，介绍了实验方法，包括玻璃的制爷，各种性质的测试手段等。论文第三章重点研究了用于LD泵浦的Yb3＋、Er3+共掺铝硅酸盐玻璃的光谱性质。探讨了玻璃中E产离子浓度以及Yb3+离子浓度和玻璃成分对玻璃中州离子光谱性质的影响。研究发现，在掺Yb3+和Er3+离子浓度均为1.56*1020/cm3时，玻璃的综合光谱性质最佳。在低Er3+掺杂浓度下，OH-离子浓度对荧光寿命的影响不明显；Er3＋掺杂浓度高时，荧光寿命受OH-离子浓度的影响较大，Er3+离子与OH基团的相互作用参数可以与掺饵磷酸盐玻璃的相当。当E尸＋离子掺杂浓度高达3.5*1020cm-3时经脱水处理后，Er3+荧光寿命可达6ms以上。在第三章的第三节研究了Er3+离子浓度对荧光上转换的影响，利用F6rster-Dexter模型对ZrO2-La2O3-Al2O3-SiO2玻璃中由实验拟合的上转换因子C改I，和理论计算出的上转换因子Cel进行了分析，Cel和Cexp随Er3+离子浓度增大而增大，Cel和Cexp随Br3＋离子浓度的变化趋势一致。第四章对经过引入Na或F改性的铝硅酸盐玻璃中的Er3+离子的光谱性质进行了研究。掺Er3＋的Na2O-Al2O3-SiO2玻璃中，随Na2O含量的增加，玻璃中非桥氧离子增加，造成玻璃结构及Er3＋离子配位场的变化，导致J-O参数ΩI（f＝2，4，6）减小。由于Ω6的减少，Er3＋离子1533nm的吸收截面和荧光半高宽、Er3+离子认3／2能级的自发辐射几率也随Na2O含量的增加而减小，由于玻璃网络结构随Na20含量的增加而疏松，降低了Er3＋离子1533mn发光的浓度淬灭效应，增加了Er3+离子的荧光寿命。在AIF3-Al2O3-SiO2玻璃中，随着Er3+离子浓度的增加，Ωt参数（Ω2，Ω2，Ω6）都在减小；受激发射截面减小；荧光强度先增加然后迅速变小。Er3+最佳离子浓度在3-5*1020ions／cm3。随着Yb3＋敏化离子浓度的增加，玻璃样品的荧光强度也在逐渐增大。Yb3＋离子浓度的变化对氟铝硅玻璃的。t（t＝2，4，6）参数基本没有影响，Ω2、Ω4和Ω6分别保持在6.5*10-20cm-2、1.8只10-20cm2和0.8*10-20cm2左右。第五章主要对低硅钙铝硅酸盐玻璃的光学带隙和光谱性质的Er3+离子浓度效应进行了研究。研究结果表明，在低硅钙铝硅酸盐玻璃中，随着MgO取代CaO和La2O3，吸收边向短波长方向移动；光学带隙（Eopt）增大，同时Urbach能量⊿E的值也增大。影响辐射几率的主要因素是OH-基与Er3+离子的相互作用导致的无辐射跃迁；随着Er3+离子浓度的增大，低硅钙铝硅酸盐玻璃的荧光半高宽增大，积分吸收截面和峰值吸收截而都有减小的趋势，而月．都是在Er3+离子浓度较低时变化趋势快，到了较高浓度后减小的趋势变缓。此外，随着Er3+离子浓度的增大，Ω2和Ω4减小，而Ω6变大。MgO取代CaO或添加La2Ω3后，Ω2、Ω4和Ω6同时变大。最后是本论文的结论部分，概括了全文的主要研究结果。 |
| 英文摘要 | The Erbium-doped glass waveguide amplifier and microchip laser are very attractive because their emission wavelength is the standard telecommunication wavelength of 1.5um and eye-safe region. For either integrated waveguide amplifier or microchip laser application, the rare earth ion concentration in the host glasses must be high enough to ensure sufficient gain in short active length. However, the appearance of concentration quenching and devitrification at high RE concentrations in most glass systems has been the major obstacle in this area. In this thesis, the work is focused on the spectroscopic properties of erbium doped aluminosilicate glasses. The composition of glass is optimized and the technique is improved in order to achieve the optimal spectroscopic properties. The purpose and significance on investigation of erbium doped aluminosilicate glass are stressed in the introduction part. Following is.the description of theoretical foundation of Er3+ doped materials, the development trend of laser glasses and planar waveguide amplifier and the idea of this dissertation is also presented. In second chapter the experiment methods are introduced. They include glass preparation procedures and spectroscopic property measurements. In chapter three, the spectroscopic properties of LD-pumped Yb/Er and Er-doped aluminosilicate glasses were investigated. The effect of Yb3+ and Er3+ concentrations and glasses compositions on spectroscopic properties of erbium ions was discussed. It was found that the spectroscopic properties of aluminosilicate glasses is the best when Yb3+ and Er3+ concentrations are both of 1.56 X 102%m3. The influence of OH on fluorescence lifetime is not obvious at the low Er + concentration but it becomes severe in the high Er3+ concentration. The effect of Er3+ concentration on upconversion fluorescence of erbium doped aluminosilicate glasses was studied in the third section. The FOrster-Dexter model is used to analyze the 4Ij3/2 upconversion coefficient of ZrO2-La2O3-Al2O3~SiC>2 glass. With increase of Er3+ concentration, both experimental upconversion coefficient Cexp and theoretical upconversion coefficient Cci increase. In the chapter four, the effect of Na20 or AIF3 on the spectroscopic properties and up-conversion of the highly Er-doped aluminosilicate glasses was studied. The J-0 parameters of erbium aluminosilicate glasses have been calculated from the measured absorption spectra. The oscillator strength, spontaneous emission probability, quantum efficiency and up-conversion coefficient of Er3+ have been calculated from the measured fluorescent lifetime and the calculated J-0 parameters. The spectroscopic properties of Yb.Er-codoped low silica calcium aluminosilicate glasses have been studies in the chapter five. The optical band gap and effect of Ei"2O3 concentration on spectroscopic properties of low silica calcium aluminosilicate glasses were investigated. It was found with the substituting MgO for CaO content and the adding of La2O3, the absorption edge shifts towards shorter wavelength. The optical band gap (Eopt) increases and Urbach energy All value increases. The main factor of restricting radiative probability is the non-radiative transition that is ascribed to the inter-reaction between OH group and Er + ions. With the increase of Er3+ concentration, the FWHM(Full width at half maxium) increases but the absorption crosssection decreases. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15393]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 张德宝. 掺铒铝硅酸盐和低硅钙铝硅酸盐玻璃的光谱性质研究[D]. 中国科学院上海光学精密机械研究所. 2005. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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