新型掺镱激光玻璃的研究
文献类型：学位论文
| 作者 | 戴世勋 |
| 学位类别 | 硕士 |
| 答辩日期 | 1999 |
| 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 | Yb~(3+)激光玻璃 掺镱磷酸盐和硼酸盐玻璃 光谱特性 |
| 中文摘要 | 本工作重点研究了Yb~(3+):磷酸盐和Yb~(3+):硼酸盐二个系统的玻璃形成区、析晶性能、吸收光谱和荧光寿命特性，旨在寻找合适的掺镱基质玻璃，以期最终获得高受激发射截面、长荧光寿命、物理化学性能好的可供实用的掺镱激光玻璃。本文分为序言、文献综述、理论基础、实验、结果与讨论和结论六个部分。本文首先概述了掺镱激光玻璃的研究进展，介绍了掺镱激光玻璃的理论基础，并通过全面系统的实验研究取得了以下主要进展和结果：(1) 首先探明了P_2O_5-BaO-Nb_2O_5 三元系统的玻璃形成区，给出了该三元系统玻璃形成范围。发现该系统在网络形成体P_2O_5仅为20%, Nb_2O_5为30%，BaO为50%的成分点(质量分数，以下同)仍成玻璃。讨论了Nb_2O_5在系统中的作用以及部分玻璃的着色问题。认为在该系统中Nb_2O_5的作用介于网络形成体和中间体之间。玻璃着色的原因是Nd~(5+)被还原。并在此基础上研究了Yb~(3+):P_2O_5-BaO-Nb_2O_5玻璃的光谱性质，发现Nb_2O_5含量高的Yb~(3+)玻璃受激发射截面大，当Nb_2O_5=30mol%时，Yb~(3+)：P_2O_5-BaO-Nb_2O_5玻璃的受激发射截面可达0.94pm~2。(2) 研究了二价离子对Yb~(3+): P_2O_5-MO (M= Mg~(2+)、Ca~(2+)、Sr~(2+)、Ba~(2+)、Zn~(2+))磷酸盐玻璃的光谱性质的影响，发现Yb~(3+): P_2O_5-ZnO系统吸收积分截面最大。(3) 探明了B_2O_3-ZnO-Nb_2O_5、B_2O_3-ZnO-Ta_2O_5及B_2O_3-BaO-La_2O_3三元系统玻璃形成区。详细研究了Yb~(3+):硼酸盐玻璃的吸收光谱和荧光光谱，计算了Yb:硼酸盐玻璃光谱参数，讨论了网络修饰体种类、B_2O_3含量和高价离子La~(3+)、Ti~(4+)、Nb~(5+)、Ta~(5+)氧化物的引入，对掺镱硼酸盐玻璃光谱性质的影响，通过两种不同的方法对其受激发射截面σ进行计算，并对结果进行了比较和分析。结果表明Yb~(3+)硼酸盐玻璃中掺入适量的高价离子氧化物可以明显提高其积分吸收强度和受激发射截面。掺镱B_2O_3-ZnO系统玻璃的受激发射截面大于掺镱B_2O_3-BaO系统玻璃。对于具有简单二能级的Yb~(3+)玻璃，倒易法更适合用来计算其受激发射截面。Yb~(3+)玻璃的受激发射截面主要取决于积分吸收强度。(4) 系统研究了影响Yb~(3+)玻璃荧光寿命的因素。认为OH~-、玻璃形成体、网络修饰体、高价离子氧化物、Yb~(3+)离子浓度都会影响Yb~(3+)玻璃荧光寿命。其中OH~-对荧光寿命的影响占主要地位。研究发现在Yb~(3+):磷酸盐和Yb~(3+):B_2O_3-BaO玻璃中，Yb_2O_3浓度低于15%(重量比)时没有浓度猝灭。Yb~(3+):B_2O_3-ZnO玻璃易发生浓度猝灭。Yb~(3+): B_2O_5-BaO和Yb~(3+)：B_2O_5-ZnO玻璃在3.1um附近的吸收系数与荧光寿命倒数均存在线性关系。在B_2O_5-ZnO玻璃中Yb~(3+)荧光寿命对OH~-要比在B_2O_5-BaO玻璃中敏感。(5) 初步探索出一套制造Yb~(3+):硼酸盐玻璃工艺。能成功制成体积为 100ml，光学均匀性好、高掺杂浓度(Yb_2O_3重量比为15%左右)、荧光寿命为0.9ms的Yb~(3+)：硼酸盐玻璃。 |
| 英文摘要 | In order to get practical Yb~(3+)-doped laser glasses which have longer fluorescence lifetime、higher cross section for stimulated emission、lower non-linear refractive index、good chemical physical properties, we investigated mainly about Yb~(3+): borate glass and Yb~(3+): phosphate glass on their glass formation ranges、thermal stability、absorption spectra and fluorescent spectra. In this dissertation, Yb~(3+): borate glass and Yb~(3+): phosphate glass were systemically studied. Some valuable results were obtained: (1) The ternary P_2O_5-BaO-Nb_2O_5 glasses were synthesized and glass formation ranges of P_2O_5-BaO-P_2O_5 system was investigated for the first time. It is found in this ternary system glass can be formed even when network former P_2O_5 is 20%. The effect of Nb_2O_5 on glass formation and colorless of glass is discussed. Nb_2O_5 is an intermediate oxide. In Yb~(3+):P_2O_5-BaO-Nb_2O_5 glasses, the cross section for stimulated emission increased with Nb_2O_5 content. When Nb_2O_5 content equal to 30 mol%, the cross section for stimulated emission is 0.94pm~2. (2) The effect of alkaline earth ions such as Mg~(2+)、Ca~(2+)、Ba~(2+)、, etc on the spectra properties of Yb~(3+):P_2O_5-MO glasses were investigated. The cross section for stimulated emission of Yb~(3+):P_2O_5-ZnO is much larger. (3) Found out glass formation ranges of B_2O_3-ZnO-Nb_2O_5、B_2O_3-ZnO-Ta_2O_5、B_2O_3-BaO-La_2O_3 systems. The absorption and fluorescent properties of Yb~(3+) borate glasses were measured. The integrated absorption cross section and stimulated emission cross section of Yb~(3+) borate glasses have been calculated. The effect of B_2O_3 content, glass modifiers (Zno and BaO) and high valency cations (Ti~(4+), La~(3+), Ta~(5+) and Nb~(5+)) on the integrated absorption cross section and stimulated emission cross section of ytterbium borate glasses was studied. Two methods were used to evaluate the stimulated emission cross section of ytterbium borate glasses. It is found reciprocity method is more appropriate for the calculation of stimulated emission cross section of ytterbium laser glasses. We also discussed the effect of OH~- content on the fluorescence of lifetime of Yb~(3+) ion in borate glasses. (4) The effect of OH~- content, glass formers, glass modifiers, high valency cations on the fluorescent lifetime of Yb~(3+) were studied in details. OH~- content has a great negative impact on Fluorescence lifetimes of Yb~(3+) ion in borate glass. No concentration quenching was observed in Yb~(3+):B_2O_3-BaO glasses even the doping concentration is as high as 15 weight percent, while concentration quenching was observed in Yb~(3+):B_2O_3-ZnO. We also found the linear relationship between absorption coefficient at 3. 1um and reciprocal of lifetime in both B_2O_3-BaO and B_2O_3-ZnO system. The fluorescence lifetimes of B_2O_3-ZnO system are more vulnerable to be affected by OH~- than these of B_2O_3-BaO system. (5) Formed primarily a set of technology for producing Yb~(3+)-doped borate glasses. We can make a big volume (100ml)、homogeneous、high doping concentration (Yb_2O_3 content equal to 15 weight per)、long fluorescent lifetime(close to 0.9ms) Yb~(3+)-doped borate glasses. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16492]  |
| 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 | 戴世勋. 新型掺镱激光玻璃的研究[D]. 中国科学院上海光学精密机械研究所. 1999. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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