【作者】 白杨；

【导师】 侯洵； 白晋涛；

【作者基本信息】 西北大学 ， 光学， 2004， 硕士

【摘要】 本文第一章介绍了半导体激光（LD）泵浦全固态绿光激光器的主要特性、优点、应用领域及国内外发展现状。 第二章分析了固体激光器的工作原理，以四能级系统为模型，从与空间相关的速率方程出发，研究了泵浦激光和振荡激光的空间分布、阈值功率、输出功率与斜效率、LD端面泵浦固体激光器的输入输出特性及各空间变量对输出特性的影响，并讨论了腔内二次谐波产生理论。 第三章从分析激光晶体的热透镜效应出发，对单端泵浦激光晶体进行了分析，建立了符合工作条件下激光系统的热温场模型，通过热传导方程及晶体的边界条件，利用半解析热分析方法得出了晶体内部温度场的半解析解，并对实例进行了计算，分析了各种参量对温度场分布的影响。 第四章研究了大功率半导体激光与激光晶体之间的耦合系统。利用矩阵光学方法，分别推导了高斯光束经双平凸镜耦合简和自聚焦微透镜两种耦合系统聚焦后的束腰宽度和像距的计算公式。 第五章分析了Nd：YVO₄和LBO晶体的光学特性。立足于激光器的产品化，基于谐振腔的像散补偿和热稳定性的设计思想，采用大功率LD单端泵浦Nd：YVO₄晶体，具有高光损伤阈值的Ⅰ类非临界相位匹配LBO晶体腔内倍频方案，应用ABCD定律和腔结构模拟软件CDA设计并优化了一组腔参数。利用AutoCAD和UG产品机械设计软件实现了对激光器的外型和腔结构及元件的机械部分图纸设计，最后完成了最大功率9.9W的水冷532nm连续绿光激光器和最大功率6.4W的半导体冷却532nm连续绿光激光器产品的研制与开发。 第六章为本论文的总结和展望。更多还原

【Abstract】 In the first chapter of this paper, diode-end-pumped all-solid-state laser’s main features and advantages, its field of application as well as the present development as home and abroad is introduced.In the second chapter, the operating principle of solid-state laser is analyzed. Based on the model of four-level system and with the space-related rate equations, the space distribution of laser beam and pump beam, the threshold pump power, the output power, the slope efficiency, the input-output characteristic and the effect of space variables on the output character are studied. Also, the introcavity second harmonic generation (SHG) theory is discussed.In the third chapter, by the analysis of the thermal lens effect of laser crystal, single-end-pumped laser crystal is analyzed and a thermal model suited for particular operating circumstance is founded. By the use of equation of heat conduction and with the boundary conditions, the half analytic solution of thermal field in the laser crystal is obtained through half-analytic thermal analysis, and a practical example is calculated together with analysis of the effect of some parameters on the distribution of thermal field.In the fourth chapter, the coupling system between the fiber-coupled-output high power semiconductor laser acting as the pumping source and laser crystal is studied. By the method of matrix optics, the waist width and imaging distance of Gauss beam through the self-focusing micro lens system and the double plan convex lens coupling system are deduced.In the fifth chapter, the optical characteristics of Nd:YVO4 and LBO are studied. Grounding on the purpose of industrialization of laser, based on the thought of astigmatism compensation and thermal stability of the cavity, we employed high power LD to pump Nd:YVO4 crystal and used the introcavity frequency doubling with type 1 noncritical phase-match LBO crystal, which has high damage threshold. The cavity parameters are optimized by the use of ABCD theory and the resonatorstructure CAD software. The external form of laser, the cavity structure and the mechanical components are designed by mechanism drawing software AutoCAD and UG. There is a water-cooled CW 532nm green laser with the maximum output power of 9.9 W, along with a semiconductor-cooled CW 532nm green laser with the maximum output power of 6.4 W are developed.The sixth chapter is the summarization and prospect of the paper.更多还原