| 题名 | 大功率LDA的光束整形与光纤耦合输出 |
| 作者 | 石鹏 |
| 学位类别 | 硕士 |
| 答辩日期 | 2000 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 陆雨田 |
| 关键词 | 激光光束整形 激光二极管列阵 拉格朗日不变量 |
| 中文摘要 | 本论文利用拉格朗日不变量的原理，从理论上分析了对大功率激光二极管线列阵器件输出的线状激光进行整形的关键、可行性和设计思路：用特定的器件将线状激光光束进行分割、旋转以及重排列，从而实现半导体激光 的光束重组，使它在快方向和慢方向上的拉格朗日不变量接近。这之后，就可以用常规的光学器件如透镜、棱镜等将它聚焦成一个很小的角分布均匀的光斑，并耦合进光纤，以实现灵活的运用。我们的线光束不足形的核心器件-微片棱镜堆，可以实现所需的光束重排列。为了验证微片棱镜堆的整形效果，并对微片棱镜堆的设计提供指导，用光线追迹法对微片棱镜堆的整形过程进行了计算机模拟。通过模拟程序，分析了微片棱镜的大小、特性和激光束的发散等因素对整形结果的影响。最后，在理论研究与实验研究的基础上，设计并制作了微片棱镜堆光束整形器，及15W 和 30W 的光纤耦合输出半忖体激光器模块。本论文的创新点有两个：1. 用微片棱镜堆实现LDA光束整形和光纤耦合输出。2. 用计算机模拟研究整形过程和指导参数设计。 |
| 英文摘要 | In this thesis, analyzed with Lagrange invariant, it is evaluated that what's the key and feasibility for beam-shaping of high power laser diode array (LDA) and how to design a beam shaper. The answer is to find out a proper approach to equalize the Lagrange invariants in fast and slow directions of a LDA by dividing, rotating and repositioning the laser beam. The rearranged beam can be focused to a very small spot with uniform divergence by some regular optics such as lens. It can also be coupled into a fiber for flexible usage. We designed a micro-prism stack to complete this rearrangement. To simulate the process and guide the design of micro-prism stack, a program is written by means of ray tracing. With it, the factors, such as the size and character of micro-prism, the divergences of laser beam and so on, which may influence the efficiency is discussed. Think about the theoretical analysis and experimental results, the beam shaper using micro-prism stack and two fiber coupled LDA modules, which may output 15W and 25W laser, are demonstrated. There are two primary innovations in this thesis: 1. Using micro-prism stack to perform the beam-shaping of LDA and fiber coupling. 2. Computer simulation for the process of beam's rearrangement and guiding the design. |
| 语种 | 中文 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16552]  |
| 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 | 石鹏. 大功率LDA的光束整形与光纤耦合输出[D]. 中国科学院上海光学精密机械研究所. 2000. |
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