空间应用kHz电光调Q激光器关键技术研究
文献类型：学位论文
| 作者 | 刘琪 |
| 文献子类 | 硕士 |
| 导师 | 孟俊清 |
| 关键词 | 电光调Q electro-optic Q-switches 全固态激光器 solid state laser 电光调Q驱动器 driver for electro-optic Q-switches |
| 其他题名 | Study of kHz electro-optic Q-switched laser for space applicationgs key technologies |
| 英文摘要 | 随着人类空间技术的不断提升，对于空间载荷的要求也越来越严格。全固态激光器作为一种重要的空间载荷，可用于空间对地观测、深空探测以及空间通信等领域，近几十年来也得到了良好的发展。特别是最近单光子探测技术在空间探测中得以应用后，高重复频率、窄脉冲、高稳定性与光束质量的空间激光器成为了发展的新趋势。 本论文进行了基于空间应用的高重频电光调Q激光器关键技术的研究。论文中首先介绍了研究开展的应用背景与重要意义，并对国内外的空间激光器进行了调研，总结了空间应用的固体激光器在近几十年的进展状况。 针对空间应用的高重复频率窄脉冲固体激光器，介绍了激光器各种调Q方式的特点，对各种方式进行了比较分析，并重点介绍了本文采用的电光调Q的方式；对电光调Q驱动器的原理进行了简单介绍，并对驱动器发展现状做了全面调研，对驱动器电路不同的拓扑连接方式做了介绍；选用了软件Candence/Pspice进行仿真分析，并对适于空间应用的电光调Q驱动器电路进行了分析与仿真优化；制作了输出脉冲电压为2400V，脉冲下降沿在20ns以内的电光调Q驱动器和适于激光器耦合输出方式的脉冲电压为1000V的电光调Q驱动器；进行了热功耗实验与分析，证明了驱动器的实用性与可靠性。 设计出了一种适于空间环境的高复重频率窄脉冲电光调Q固体激光器。激光器采用正交双porro棱镜组成的直线谐振腔结构；用激光二极管侧面泵浦Nd：YAG板条晶体；磷酸钛氧铷晶体（RTP）作为电光调Q开关，并采用偏振耦合输出的方式输出激光；搭载本文设计制作的高重频电光调Q驱动器。实现了激光脉冲重复频率1kHz，平均功率1.15W，脉冲宽度1.3ns，光束质量M2因子为1.20，波长为1064nm的脉冲激光输出。本设计结构合理，功能稳定，为未来的新型空间探测雷达系统提供了光源技术储备。 进行了适用于空间应用的高重频窄脉冲蓝绿激光器的初步研究。在本研究的基础上设计了腔内倍频与腔外倍频的蓝绿激光器。 最后进行了论文的总结，并面对未来的发展需求对课题进行了展望。; With the improving of the space technology, people are more and more strict to the requirement of space load. All solid state laser as an important spatial load, can be used for earth observation, space explorations, and space communications and other fields, also got good development in recent decades. Especially recently single photon detection technology is applied in space exploration, so high repetition frequency, narrow pulse, high stability, high beam quality lasers become a new trend of development. This paper studied the key technologies of the high repetition frequency narrow pulse width electro-optic Q-switched lasers for space application. The application background of spaceborne lasers was reviewed and some successful spaceborne solid-state lasers in the world were introduced, the progress of all-solid-state space lasers in recent decades was summarized. Aimed at high repetition frequency narrow pulse solid lasers, the characteristics of various kinds of Q-switches were introduced. Various methods were Compared and analyzed, the way of electro-optic Q-switches was mainly introduced; The principle of drives for electro-optic Q-switches was introduced, and the development and present situation of drives for electro-optic Q-switches present situation was investigated, the different circuit topologies of drives was introduced; Candence/Pspice was selected to simulat the circuit，and the drives of electro-optic Q-switches for space application was designed，and the circuit was analyzed and simulated. The drives were produced, output pulse voltage is 2400V, pulse falling edge within 20 ns Q drive and the drives output pulse voltage is 1000 V for laser polarization-coupled outputting were produced; Thermal power consumption were analyzed to proving the practicability and reliability. A high frequency, narrow pulse electro-optic Q-switched solid state laser for space application was designed. The lasers adopt ultra-stable double porro prism cavity, using laser diode side pumping, RTP crystal as electro-optical Q-switched switch, and polarization-coupled outputting. The system achieved 1kHz laser pulse repetition frequency, 1.15W average power, 1.3ns pulse width, the beam qulity factor M2 of two direction were 1.20，the output wavelength was 1064nm. The lasers have a compact structure, good performance and can be used as the light source for the new space detection lidar in the furture. A high repetition frequency narrow pulse blue and green laser was studied. Intracavity frequency doubling and cavity frequency doubling of blue-green lasers built on the basis of this study were designed. The last part was the summary of the thesis, and the demand for the development of the future was prospected. |
| 学科主题 | 光学工程 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/31005]  |
| 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 | 刘琪. 空间应用kHz电光调Q激光器关键技术研究[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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