千瓦级全光纤化光纤激光器实验及工程化研究
文献类型：学位论文
| 作者 | 代守军 |
| 学位类别 | 硕士 |
| 答辩日期 | 2013 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 何兵 |
| 关键词 | 激光器 光纤激光 全光纤 原理样机 |
| 其他题名 | Experimental research and engineering study on kW level all-fiber fiber lasers |
| 中文摘要 | 高功率光纤激光器具有转换效率高、结构紧凑、散热性能好、光束质量好、易于实现高功率激光输出等优点，可广泛应用于国防军事、材料加工、医疗以及科学研究等领域。全光纤化结构光纤激光器利用全光纤器件(光纤合束器和光栅)取代光学镜片，减小了光学界面，提高了光纤激光器的稳定性和可靠性。本论文主要对千瓦级全光纤化光纤激光器进行详细实验及工程化研究。 第一章综述光纤激光器的基本原理及特点、发展历史和发展趋势。介绍高功率双包层光纤激光器在工业、军事、医疗中的典型应用和应用前景。并展望高功率光纤激光器的发展前景。 第二章对连续波高功率光纤激光器中的热效应进行理论和实验研究，对仅由于涂覆层的热损伤引起的功率极限给出理论模拟，并对千瓦级光纤激光器中无源光纤与增益光纤熔点冷却进行理论与实验研究。测量光纤与不同结构热沉之间的接触热阻，并提出有效的散热方案。 第三章提出光纤涂覆层剥除，光纤切割及光纤端面清洁的原则和方法。分析双包层光纤内包层及纤芯偏移对光纤熔接的影响，根据分析结果，针对主振荡功率放大（MOPA）全光纤化光纤激光系统中关键熔接点，提出合理的光纤熔接方案。 第四章对千瓦级全光纤化光纤激光器进行实验及工程化研究。使用第二章提到的新型散热技术及第三章提到的光纤熔接方案，基于主振荡功率放大（MOPA）结构，搭建了1080 nm 1 kW全光纤激光器原理样机、1080 nm 1 kW高效率全光纤激光器原理样机和1080 nm 1.5 kW全光纤激光器实验平台及原理样机。 |
| 英文摘要 | High power fiber lasers have many advantages such as high conversion efficiency, compact structure, good heat dissipation, good beam quality and easy to achieve high power laser output, and they can be widely used in defense and military affairs, material processing, medical and scientific research and so on. The all-fiber lasers employ fiber components, such as fiber combiners and fiber gratings, to replace the bulk optical components and reduce the optical interface. Thus, the all-fiber lasers are more compact and reliable novel lasers. In this thesis, all-fiber high-power fiber lasers technology is researched experimentally and engineeringly in detail. In the first chapter, the principle, characteristic, the history, current status, and future prospects of rare-earth doped fiber lasers is introduced. The typical applications and developing prospects of high-power fiber lasers are reviewed. In the second chapter, we study the thermal effects in high power CW fiber lasers, and the maximum output power of fiber lasers limited by the thermal degradation of coatings is theoretically simulated. Theoretical and experimental study of splice points cooling in kW level CW fiber lasers is has been done. Thermal contact resistance between the fiber and its different heat sink are measured separately and efficient cooling method is proposed. In the third chapter, the principle and method of fiber stripping, cleaving and end face cleaning are presented. The influence of the double-clad fiber inner-cladding and core axial deviation on fiber splicing is theoretically analyzed. Based on the analysis of the results, in the master oscillator power amplifier (MOPA) system, a reasonable method to splice the key points is proposed. In the fourth chapter, the kW level all-fiber laser is studied experimentally and engineeringly. By using the new cooling technology in the second chapter and the fiber splicing method in the third chapter, based on the master oscillator power amplifier (MOPA) architecture, a 1080 nm, 1 kW laser prototype, a high efficiency 1080 nm, 1 kW laser prototype and a 1080 nm, 1.5 kW all-fiber laser experimental platform and prototype are obtained. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16764]  |
| 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 | 代守军. 千瓦级全光纤化光纤激光器实验及工程化研究[D]. 中国科学院上海光学精密机械研究所. 2013. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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