| 题名 | 微型多程陶瓷板条激光器技术研究 |
| 作者 | 王岩 |
| 学位类别 | 硕士 |
| 答辩日期 | 2011 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 陈卫标 |
| 关键词 | 多程，微型板条激光器，陶瓷激光器 |
| 其他题名 | Research of multi-pass mini-slab Nd:YAG ceramic laser technology |
| 中文摘要 | 在固体激光技术及其相关领域的发展中，高光束质量的大功率激光输出是现代激光器不断追求的发展目标。因此，本文在深入分析并掌握了Nd:YAG板条激光器关键技术的基础上，重点对以多晶Nd:YAG陶瓷材料为增益介质的光学谐振腔以及微型多程折叠镜结构特性进行了探索研究，取得了显著的进步。研究内容主要包括: 调研Nd:YAG板条激光器、多晶Nd:YAG陶瓷材料及其激光器的发展历史、研究现状以及应用特点。系统地分析了LD泵浦Nd:YAG调Q激光器的速率方程和激光输出特性，给出了激光输出能量、阂值、斜效率、脉冲峰值功率和脉冲宽度等一些参量的表达式。首次研究了基于Nd:YAG透明陶瓷材料的微型多程激光器技术，通过优化设计光学谐振腔，减小板条激光器横向通光口径，减小出射光斑的横纵比等技术措施，达到了提高板条激光器输出光束质量的预期目标。采用五折镜的结构，实现了26W的连续激光输出，光光转换效率为3496，横向和垂向的M，因子分别为1. 6和2. 4。在声光调Q运转模式下，当重复频率为2CIkHz时，得到平均功率为24W的脉冲激光输出，脉宽为33ns. |
| 英文摘要 | In the development of solid-state laser technology and related fields, the incessantly pursued goals of modern lasers are better beam quality and higher output power. Thereby, on the basis of in-depth stud扒ng and"analyzing the Nd:YAG crystal slab laser's key technology, the following dissertation mainly researches on the Nd:YAG ceramic laser media and multi-pass folded mirrors, and made significant progress. The content as follows: We investigated and summarized the history，evolution and characteristics of Nd:YAG slab laser and Nd:YAG ceramic. In addition, we introduced the basic theory, rate equation and laser output characteristics of laser diode pumping Q-switched Nd:YAG laser, as well as the expressions of laser power, threshold, slope efficiency, peak power and pulse width are given. We investigated the multi-pass Nd:YAG ceramic laser technology for the first time. By specially optimizing the parameters of resonant cavity, we reduced the transverse clear aperture and beam aspect ratio of slab laser, finally achieved the goal of improving slab laser beam quality. By using 5-pass folded mirrors, we demonstrated 26 Watt continuous laser output with an M2 factor of 1.6 in the transverse direction and 2.4 in the vertical direction, which gives optical conversion efficiency of 34%. In acousto-optic Q-switch mode, the 24 Watt average output power pulsed laser is obtained at 20 kHz repetitive frequency with pulse width of 33 ns. |
| 语种 | 中文 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16835]  |
| 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 | 王岩. 微型多程陶瓷板条激光器技术研究[D]. 中国科学院上海光学精密机械研究所. 2011. |
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