【作者】 张治国；

【导师】 熊木地； 金玉奇；

【作者基本信息】 大连海事大学 ， 电子与通信工程， 2011， 硕士

【摘要】 为了解决高能激光器输出光束的光束质量由于受热透镜效应影响而引起的随时间蜕变问题,研究了一种主动光学元件的结构,只使用一个驱动器使反射镜的曲率产生可控制的改变,用以补偿高能激光器中增益介质或光学元件因热效应而产生的球差。通过理论计算和有限元分析的方法对该结构进行数值分析,按照真实机械结构建立三维模型,针对不同参数的光学元件和机械结构进行有限元分析,并把有限元分析结果与理论计算结果进行对比。按照模型参数加工制造了实验装置,使用干涉仪对实验装置在不同力作用下的变形情况进行测量,把实验测量数据与有限元分析结果进行对比。通过理论计算、有限元分析和实验研究验证,三者结果能很好的吻合,通过实验也证明这种结构能够使反射镜产生微小变形,通过精确控制驱动器,可以使反射镜产生所需要的曲率变化。通过使用光学理论推导出使用该结构补偿热透镜效应引起的输出光束球差项的补偿公式,结果表明,这种主动光学元件可以用于谐振腔内补偿高能激光器中热效应产生的球差项的影响。更多还原

【Abstract】 In order to resolve the output beam of high energy laser beam quality due to thermal lensing effect transformation problems arising over time, studied the structure of an active optical components, use only one drive change in curvature of the mirror can be controlled, or compensation in high energy laser gain media resulting from thermal effects of spherical aberration optical components. Through theoretical calculations and finite element analysis method for numerical analysis of the structure, in accordance with the establishment of three dimensional model real-world mechanical structure for different parameters of optical elements and mechanical structures for finite element analysis and theoretical calculation of finite element analysis with the results for comparison. In accordance with the model parameters experimental equipment for processing and manufacturing, using Interferometer experimental apparatus to measure the deformation under different force, finite element analysis of measurement data and the results compared. Through calculation, finite element analysis and experimental study on verification, three results are very good anastomosis, by experiments prove the structure to make mirror micro-deformation, by precisely controlling the drive, can make mirrors of curvature required changes. Inferred by using the theory of optical structure using compensating thermal lens effect caused by the output beam of spherical aberration compensation formula, results show that this active optical element can be used for high energy laser resonant cavity compensation of thermal effect in spherical aberration effects.更多还原