全固态ndyvo4晶体热稳定腔的设计-毕业设计.docVIP

目录 摘要 1 中文摘要 1 ABSTRACT 1 第一章：绪论 3 1.1全固态泵浦激光器的特点 3 1.2全固态Nd:YVO4晶体研究历史和现状 4 第二章：全固态Nd:YO4的优化设计 7 2.1 Nd:YVO4物理学和光学特性 7 一、 Nd:YVO4晶体的吸收和发射谱线 7 二、Nd:YO4晶体各项异性 9 2.2热稳定腔的优化 13 一、光学元件的矩阵描述 13 二、Nd:YVO4晶体激光器热稳定直腔设计 14 三、适于LD端面泵浦四镜谐振腔设计 16 本章小结 21 第三章：Nd:YVO4激光器的实验研究 22 3.1直腔结构的Nd:YVO4的实验研究 22 一、实验装置 22 二、运用MATLAB模拟： 23 三、实验结果和分析： 25 3.2四镜折叠腔Nd:YVO4激光器的实验研究 26 一、实验装置 26 二、运用MATLAB模拟 27 三、实验结果和分析 31 第四章：结论 33 致谢 34 参考文献 35 摘要 中文摘要 高功率激光二极管泵浦固体激光器是近年来国际上发展最快、最有发展潜力的新型激光器之一。随着大功率半导体激光器技术的不断完善和发展，高功率二极管泵浦固体激光器已经成为国内外学者的研究热点，这些研究主要集中在如何有效地提高激光输出功率和改善激光光束质量方面，其中最主要的障碍来自激光晶体的热效应。 在端面泵浦固体激光器中，泵浦光被聚焦到激光晶体中心很小一个区域，会使晶体产生形变，从而形成透镜效应。本篇论文在根据对Nd:YVO4晶体的各项异性、各种光学元件的传输规律和传输矩阵等学习的基础上，对Nd:YVO4晶体的热焦距进行了实验测量。然后把实验结果应用到光学谐振腔设计之中。通过运用MATLAB对激光光学谐振腔进行模拟，降低晶体热透效应的影响，设计出稳定的光学谐振腔，提高激光的输出功率，改善光束质量。 关键字：全固态激光器，热效应，Nd:YVO4晶体，热稳定光学谐振腔，端面泵浦 ABSTRACT High power diode pumping all-solid-state lasers have recently attracted much more interest for their unique merits. With the development of high power diode lasers, high power DPSSL has become one of the main objectives of current research and development activities within the laser community. Research of DPSSL has mainly concentrated on scaling of output power, while remaining of a high spatial beam quality. The main problem hindering scaling of diode-pumped solid-state laser is heat deposition within the laser medium. Large thermal gradient arises from the heat deposition within a very small volume near the pumping facet of the laser crystal in longitudinally pumped system, resulted in the deformation of the crystal produced to form the lens effect. In this paper, based on the learning about the Nd:YVO4 crystal anisotropy ,the transmission of various optical components and transfer matrix, Measured the thermal focal length of the Nd:YVO4 crystal in the experiment. And then, the experimental results applied to the optical resonator design. By using?MATLAB,?to simulate?the laser?optical resonator?to reduce?effect of?heat through?the crystal, des