陶瓷单晶化制备YAG平面波导结构研究
文献类型：学位论文
| 作者 | 甘啟俊 |
| 文献子类 | 硕士 |
| 导师 | 张龙 |
| 关键词 | YAG激光材料 YAG laser materials 陶瓷单晶化 solid state crystal growth 平面波导 planar waveguide |
| 其他题名 | Research on fabrication of YAG planar waveguide structure via solid state crystal growth |
| 英文摘要 | 固体激光器从1960年被发明以来，已经取得了长足的发展，其输出功率也不断突破新的瓶颈。百千瓦级别的激光器已经实现并且即将投入到军事应用，激光武器已经不再是遥不可及，因此，现在各国都已经加入高功率激光武器的研究行列。对于固体激光器来说，热管理性能和自发辐射放大（ASE）效应是两个根本并且必须解决的问题。为了突破这两个瓶颈问题实现高功率激光输出，各国学者提出了不同的解决方案：薄片激光器、热容激光器、复合结构板条激光器等。而复合结构板条激光器由于其结构灵活多变，可以适应不同的需求条件，因此成为高功率固体激光器中重要的一员。平面波导结构更是由于其独特的光学性质和优异的热管理性能受到大家的青睐。 基于此，本论文选取了平面波导这一复合结构作为研究内容，采用陶瓷单晶化，即高温诱导陶瓷定向生长技术开展研究。 第一章首先阐述了固体激光器的发展历程以及不同构型的固体激光器的原理以及应用。接着，重点阐述研究核心，即平面波导结构的研究现状和原理。随后，介绍了陶瓷单晶化过程并和其他多层结构的键合方式对比。最后，简要介绍YAG体系激光材料，这也是本论文所研究的体系。 第二章重点介绍了对YAG体系激光材料制备的研究，包括YAG、Nd:YAG和Yb:YAG陶瓷和YAG、Yb:YAG晶体的制备和相关表征。获得光学质量优异的YAG体系激光材料，为之后的陶瓷单晶化研究和平面波导结构研究奠定基础。 第三章详细介绍了利用陶瓷单晶化过程制备YAG晶体/YAG陶瓷、YAG晶体/Nd:YAG陶瓷和YAG晶体/Yb:YAG陶瓷三种双层复合结构，并研究了烧结温度、烧结时间和单晶晶面取向对陶瓷单晶化厚度的影响。结果表明，烧结温度和烧结时间与单晶化厚度成正相关，而单晶晶面取向并没有影响。此外还对陶瓷内部晶粒长大、掺杂离子浓度分布、气孔对单晶化过程影响、样品荧光性能以及单晶化后的晶体的取向等问题进行了研究。 第四章则解释了利用陶瓷单晶化过程制备YAG陶瓷/Yb:YAG晶体/YAG陶瓷三层平面波导结构，并对其掺杂离子浓度分布、荧光性质和激光性能进行了表征。通过连续激光实验，实现了最高1.83 W的激光输出。; Since the invention of solid-state laser (SSL) in 1960, researchers have made remarkable progress in this realm, and the output power has increased at a fantastic speed. Lasers with output of 100 kW level has been achieved and is about to apply for military purpose. Laser weapon is no longer far from reach, but a crucial project for countries globally. For SSLs, heat management and amplification of spontaneous emission (ASE) effect are two fundamental topics that hinder its development. Scholars have put forward various solutions: thin-disk lasers, heat capacity lasers, composite structured slab lasers et al. The flexible design of composite structured slab lasers makes it suitable for different purposes and requirements and a vital member in SSL. In this thesis, planar waveguide (PWG), a kind of typical composite structured slab laser, was investigated and solid state crystal growth (SSCG) was applied as the bonding method. In chapter 1, history, mechanism and application of kinds of SSL were illustrated, especially the state of the art of PWG. Followed by introduction of SSCG and comparison of different bonding methods. At last, YAG laser materials were introduced, which is the topic of this thesis. In chapter 2, fabrication of YAG laser materials was explained in detail. YAG, Nd:YAG and Yb:YAG ceramics were synthesized via vacuum sintering and YAG, Yb:YAG single crystal were synthesized via Cz method. In chapter 3, SSCG process was investigated. YAG single crystal/YAG polycrystal, YAG single crystal/Nd:YAG polycrystal and YAG single crystal/Yb:YAG polycrystal were fabricated via optical contact bonding and vacuum sintering. Sintering temperature and sintering time were found to be in positive correlation with thickness of SSCG, while crystal orientation possesses little impact on the SSCG process. Furthermore, abnormal grain growth, doping profile in the bilayer structure, influence of pores on SSCG, characterization of fluorescence properties and the crystal orientation of the grown single crystal were studied in the chapter detailly. In chapter 4, YAG polycrystal/Yb:YAG single crystal/YAG polycrystal trilayer planar waveguide structure was fabricated via SSCG. Doping profile, fluorescence property and laser performance of the sample were investigated comprehensively. And maximum laser output of 1.83 W was achieved in the continuous wave laser test. |
| 学科主题 | 材料学 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/30944]  |
| 专题 | 中国科学院上海光学精密机械研究所 |
| 作者单位 | 中国科学院上海光学精密机械研究所 |
| 推荐引用方式 GB/T 7714 | 甘啟俊. 陶瓷单晶化制备YAG平面波导结构研究[D]. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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