【作者】 张翔； 蔡青； 向安平；

【Author】 ZHANG Xiang, CAI Qing, XIANG An-ping (Department of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China)

【机构】 成都信息工程学院光电技术系；

【摘要】 在腔内失调理论分析基础上,实验研究了无源虚共焦非稳腔失调前、后输出光束波前像差特性。结果表明,用Hartmann-Shack波前传感器进行探测,并用模式法进行波前重构可以较好反映输出光束波前像差,虚共焦腔耦合输出调腔光的波前Zernike像差主要集中在前15阶,其中比较显著的像差有离焦Z3、低阶像散Z4和Z5、以及球差Z10。且腔内倾斜扰动对光束强度分布有显著的影响,可能引起某些Zernike高阶像差如离焦、慧差和像散的增加,但首先带来的是Zernike倾斜像差的增大。因此在作腔内像差补偿时,应首先考虑腔内倾斜像差的补偿。更多还原

【Abstract】 The wavefront aberration of laser can be detected accurately by Hartmann-Shack (H-S) wavefront sensor. The effect of intracavity perturbation on mode structure properties of the passive confocal unstable resonator has been experimentally researched by adopting Hartmann-Shack method on the basis of wavefront reconstruction theory. The results show that the wavefront aberration is concentrated in the frontal 15 ranks of Zernike aberration, mainly including the defocus Z3, the low-order astigmatism Z4 and Z5, and the spherical aberration Z10. Intracavity tilted aberration remarkably affects the intensity distribution of output beam, but only a small tilted perturbation will not obviously augment the high-order aberrations of phase properties. The defocus, coma aberration and astigmatism will all be brought, and also tilt aberration is the main component when a bigger intracavity perturbation is introduced into the resonator by resonator mirrors. When adaptive optical elements such as deformable mirrors are adopted for intracavity aberration correction, the correction for tilt aberration should be considered at first.更多还原