掺Ho3+碲酸盐玻璃陶瓷中红外光谱性质的研究
文献类型：学位论文
| 作者 | 邢朝君 |
| 学位类别 | 硕士 |
| 答辩日期 | 2016 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 廖梅松 |
| 关键词 | 2~3μm发光 碲酸盐玻璃陶瓷 Ho3+ Ho3+/Yb3+共掺 中红外光 |
| 其他题名 | The study on mid-infrared fluorescence performance of Ho3+-doped tellurite glass-ceramic |
| 中文摘要 | 2~3 μm 波段的中红外激光对国防和社会经济建设有十分重要的作用。激光 材料的研究在激光技术的发展过程中具有十分重要的地位。透明的玻璃陶瓷兼备 了玻璃和晶体的优点，是一种新型光学材料。本文主要研究了 Ho3+离子掺杂透 明碲酸盐玻璃陶瓷2~3 μm 波段的发光性能。 第一章叙述了玻璃陶瓷的研究进展，介绍了Ho3+离子2~3 μm 发光的原理， 并提出了论文的研究思路。 第二章介绍了碲酸盐玻璃陶瓷的制备方法、分析方法、光谱理论计算等。 第三章研究了透明碲酸盐玻璃陶瓷的结构、机械性质、及2 和3 μm 发光性 质。用XRD 和TEM 分析样品中晶体的尺寸、晶格常数。由Raman 光谱可知， 热处理后样品的结构发生明显变化。J-O 理论计算显示晶化后Ho3+离子?2 减小， 表明部分Ho3+离子进入了晶体。在640 nm LD 泵浦下，玻璃陶瓷的2 μm 荧光强 度明显增加，荧光峰劈裂更加明显，同时实现了有效的3 μm 荧光输出，且玻璃 陶瓷样品的荧光强度明显增加。这可能是 Ho3+离子进入晶相、高的荧光分支比 (20.5 %)和低的氢氧根基团含量。在1950 nm 掺铥激光器泵浦下，在3 μm 区域 内检测到宽带荧光光谱，并且玻璃陶瓷荧光强度增加、荧光峰变窄、荧光峰的 stark 劈裂明显。这些变化归因于部分Ho3+离子进入了晶体。 第四章研究了 Ho3+/Yb3+共掺碲酸盐玻璃陶瓷的光谱性质及能量传递机理。 在980 nm LD 泵浦下，探测到Ho3+离子的上转换发光、1.2 μm 发光、2 μm 发光 和2.9 μm 发光，证实了Yb3+离子能有效的敏化Ho3+离子。与玻璃相比，玻璃陶 瓷的发光强度都略有增加，并且1.2 μm、2 μm 和2.9 μm 发光的峰值发生了明显 移动，这可能是 Ho3+离子进入纳米晶引起的。利用声子边带理论估算了 Yb3+— Yb3+和Yb3+—Ho3+之间能量传递参数。Yb3+→Ho3+的能量传递是由单声子和双声 子共同协助完成。其中，双声子发射辅助占主要地位，贡献率约占99.48%。 |
| 英文摘要 | The lasers around 2~3 μm play an important role in national defense and socio-economic construction. The study of laser materials has important action in development of laser. Combining the advantages of glass and nanocrystal, the transparent glass-ceramic is consider as a novel excellent optical material. In this paper, the 2~3 μm luminescence properties of Ho3+ ions in the transparent tellurite glass-ceramic were studied. In chapter 1, we reviewed the research progress of transparent glass-ceramic. Additionally, we introduced the luminescence principle of Ho3+ ions in 2~3 μm, then came up with the ideas of article. In chapter 2, the preparation methods of GC, property test, and the theoretical calculation were introduced. In chapter 3, the nominal component of glass was 70TeO2–15Nb2O5–15K2O. The structural, mechanical properties and 2~3 μm luminescence properties were investigated. The crystal sizes, lattice constants were studied by XRD and TEM. From the Raman spectrum, the structure of glass-ceramic changed. According to the J-O theory, the ?2 of Ho3+ ions reduced after crystallization, because of a portion of Ho3+ ions into nanocrystal. The 2 μm and 3 μm emission in tellurite glass-ceramic was obtained excited by 640 nm LD. The 2 μm emission intensity increased obviously. The 2 μm emission spectrum of glass-ceramic exhibited more remarkable Stark split peaks because of Ho3+ ions into the nanocrystals. At the same time, the efficient 3 μm emission was achieved, and the 3 μm emission intensity increased clearly, due to the Ho3+ ions into the crystal, the high fluorescence branching ratio and low OH—ions content. The 3 μm fluorescence was obtained excited by 1950 nm Tm3+ doped fiber laser by chance. After crystallization, the fluorescence intensity increased, and the fluorescence peaks narrowed and split into several peaks. All these phenomenon were ascribed to a portion of Ho3+ ions embedded into the nanocrystals. In chapter 4, the spectroscopic properties and energy transfer mechanism in the Ho3+/Yb3+ doped transparent tellurite glass ceramic were studied. The up-conversion, 1.2 μm, 2 μm and 2.9μm fluorescence were achieved in Ho3+/Yb3+ doped transparent tellurite GC excited by 980 nm LD, demonstrating the occurrence of ET from Yb3+ to Ho3+. Compared with the glass, the fluorescence in GC increased slightly. The maximum fluorescence peaks in 1.2, 2 and 2.9μm were shifted, indicating that part of Ho3+ ions entered into nanocrystals. The microscopic parameters of ET processes between Yb3+ and Ho3+ ions were evaluated using phonon sideband theory. The Yb3+ →Ho3+ forward ET is dominant, and mainly assisted by two-phonon emission with the contribution rate of 99.48%. 1.2 μm, 2 μm and 2.9μm fluorescence were achieved in Ho3+/Yb3+ doped transparent tellurite GC excited by 980 nm LD, demonstrating the occurrence of ET from Yb3+ to Ho3+. Compared with the glass, the fluorescence in GC increased slightly. The maximum fluorescence peaks in 1.2, 2 and 2.9μm were shifted, indicating that part of |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/17026]  |
| 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 | 邢朝君. 掺Ho3+碲酸盐玻璃陶瓷中红外光谱性质的研究[D]. 中国科学院上海光学精密机械研究所. 2016. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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