【作者】 郑耀辉；

【导师】 张宽收； 彭堃墀；

【作者基本信息】 山西大学 ， 光学工程， 2004， 硕士

【摘要】 全固体化激光器是一种优良的新型光源，在工业、科研、军事等领域发挥着越来越大的作用，一直是近年来激光领域研究的热点之一。激光二极管端面泵浦的固体激光器具有效率高、谱线窄、寿命长、结构简单、使用方便等优点，特别是采用环行谐振腔内加光学单向器构成的单频激光器，由于频率稳定，使其成为许多高水平量子光学实验的主要光源。本论文围绕全固态单频蓝，绿，红外激光器进行了一系列实验研究工作。 1) 设计完成了全固化单频蓝光激光器。首先，我们对增益介质的性质和非线性晶体BBO和LBO的一些性质进行了比较，选取Nd：YAG作为增益介质，LBO作为倍频晶体。理论上分析了激光器设计中的一些参数值，如增益介质长度、模式交叠率、最佳倍频条件，并根据理论分析结果设计了谐振腔。测量了输出激光偏振方向随泵浦光偏振方向变化的关系曲线，得出用线偏振光泵浦时输出激光的偏振度大约为8：1，加Ⅰ类位相匹配的倍频晶体后，基频光的偏振度大于150：1。根据这个结论，无需在腔内插入起偏器，基频光就能偏振运转。在此基础上，我们在实验上设计完成了全固化单频蓝光激光器。在2.4W泵浦功率下，最大单频蓝光输出功率为12mW，光．光转化效率为0.5％，实测的蓝光功率稳定性优于±1.5％，自由运转时的频率漂移小于±22MHz（1分钟），输出蓝光的光束质量接近衍射极限，腰斑不对称度为1.06。 2) 实验上得到了高效全固化单频Nd：YVO₄激光器。实验上测量了激光器的内腔损耗，并计算得到在泵浦功率等于2.2W时，最佳输出耦合透射率T_opt=5.2％。我们用透射率T=4.9％的镜片作为输出镜，当泵浦功率等于2.2W时，最大单频红外激光输出为1W，斜效率为54.1％。 3)试制了整体腔瓦级连续单频绿光激光器，获得1.3W稳定的单频绿光输出，单频绿光激光器的长期功率稳定度小于±1.5％（3小时）。更多还原

【Abstract】 All-Solid-State laser is an advantage lamp-house.It has many important applications and potential commercial value in many fields,such as industry, scientific research, military.So it’s always the research focus of laser field.diode end-pumped solid-state laser has many merits.including high efficiency,long lifetime,high frequency stability,narrow line width,compact configuration,convenient for use et al,which made her a necessity in many high level quantum optics experiments.In this thesis,A series of experiment research was done with regard to blue laser,green laser and infrared laser.1.) Designing and completing the all-solid-state blue laser of single-frequency operation. Firstly,We analyze the character of Nd:YAG,BBO and LBO,For Nd:YAG crystal and select the Nd:YAG as the gain medium and LBO as doubling-frequency crystal.ln the theory, Analyzing the parameter of the gain medium length ,the ratio of the pump- and laser-beam waists.Based on the above analysis, We design the resonance cavity. In the experiment, We make the curve of the relation of the output light’s polarization direction and pump light’s polarization direction.and the result is 8:1 of the output light’s polarization rate, when the pump light is linear polarization. Using the above analysis. We design the blue laser of single-frequency operation. When the power of pumping light equals to 2.4W,The outputting power is 12mW of blue laser and 13mW of infrared light, M2 of the laser beam is 1.02 in x direction and 1.14 in y direction and asymmetry is 1.062 only to the astigmation of the ring cavity, the intensity fluctuations and frequency shift of the laser output is less than ±1.5% and better than ±5.4MHz,respetively,when the laser is free running.2.)In the base of the optimum the cavity parameter. We gain the high efficient Nd:YVO4 laser of single-frequency operation. Measuring the intracavity loss of laser.In the theory ,We analyze the relation of output power and input power of the different transmission rate of output mirror.Using the experiment validated the theory result. The experiment result accord with the theory’s.When the transmission rate of output mirror equal to 4.9 percent.The output power is 1W. The slope efficiency is 54.1%.3.)Designing and completing the CW YVO4/KTP laser of the whole cavity with watt level. And obtaining the 1.3W green laser of single-frequency operation, the fluctuations of the laser’s power is less than ±1.5%(3 hour),when the laser is free running.更多还原