高能激光多点对称光谱合成技术设计方法研究
毕业论文关键词 光束合成；光束质量；传输效率
毕业设计说明书外文摘要
Title Research on High-power laser beam combiner design
Abstract
Laser has many advantages such as high energy density, good monochromaticity and strong brightness.Because it has a large number of using in military and civilian field, the study of laser technology is also more urgent. The semiconductor laser’s conversion efficiency and life have reached a high level, but caused by the structure of laser beam device,laser quality and the power density is not ideal, it is difficult to get kW level or 10kW level practical high power laser source. In order to solve this problem, the laser beam combiner is the key technology, laser beam combining technology can multiply improve the total power of the laser, so laser beam combiner is a focus in the study of laser technology. This research introduces various kinds of laser beam combining methods and development situation in our country and abroad, after comparison, choose spectral beam combining mode, design more symmetric spectral beam combine.At the same time use experimental simulation to have a real process of spectral beam combining,and with data sorting, compare with the theoretical value,analyze the spectrum, the beam quality, and efficiency of combined beams.
Keywords Laser beam combine ，Laser beam quality , Laser transmission’s efficiency
目 次
1 绪论 1
1.1 研究背景 1
1.2 与本课题相关的各式实验方法 1
2 合束元件及理论介绍 5
2.2 多点对称光谱合束 6
2.3 合束误差因素以及效率 6
3 激光合束设计方案 8
3.2 合束的效率计算 9
4 高能激光合束实验 11
4.1合束系统搭建 11
4.2合束过程中的各项实验记录 13
4.3合束结果分析 15
5 关于合束的一些后续问题 20
结论 21
致谢 22
参考文献 23
1 绪论
1.1 研究背景
最近激光技术的应用越来越多，民用中如激光矫治近视，工业中如激光工业切割，科研上如激光测距等。随着科技的进步，激光技术已经不再是遥不可及的高科技产品。正因为激光技术的应用如此广泛，它在军事领域中的地位也开始迅速发展。激光雷达、激光武器已经逐渐兴起。激光作为较为崭新的科技技术，具有非常大的优势：它不仅快速而且精准，因此它对于军用方面的匹配度也非常高。但无论是民用、工业还是军事领域，激光器的性能如今尚有一些跟不上人们的需要，随着科技进步，我们越来越需要更加高功率并且质量更加完美（以达到快速、精准的应用目的）的高能激光。国内中国科学院上海光学精密机械研究所已获得1.75kW单纤激光输出[1]，但要直接做出功率大至万瓦甚至十万瓦的完美质量直接激光应用光源既需要优越的技术也需要巨大的成本支持，考虑到现实的因素，激光合束技术变得不可或缺。激光合束是一个改善光束质量、增加输出功率、提高功率密度的过程[2]。为了得到高质量的高能光束输出，必须研究激光合束技术。