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采用哈特曼-夏克(Hartmann-Shack)波前传感器分析了腔内扰动对无源正支共焦腔调腔光模式的影响,用模式法进行了波前复原计算。引入等量扰动,腔内凹镜对于腔模的影响大于凸镜;且对于大菲涅耳数非稳腔,腔内倾斜扰动量与输出光束中查涅克(Zernike)倾斜像差系数具有较好线性关系。建立了基于哈特曼-夏克波前传感器进行腔外探测,控制腔内凹镜的低阶像差校正系统,比较了在不同腔内扰动状态下对倾斜像差的控制结果。实验表明,对于腔内扰动频率较低或者准静态的情况,控制系统对腔内倾斜像差的校正具有较好的效果。
The Hartmann-Shack wavefront sensor was used to analyze the effect of intracavity perturbation on the optical cavity mode of passive forward-branch confocal cavity, and the mode reconstruction was used to calculate the wavefront. The introduction of the same amount of perturbation causes the concave cavity mirror to have a greater influence on the cavity modes than the convex mirror. For large Fresnel unstable cavities, the amount of tilt disturbance in the cavity is significantly different from the Zernike tilt aberration coefficient in the output beam Good linear relationship. A low-order aberration correction system based on Hartmann-Shack wavefront sensor for extracavitary detection and control of concave mirrors in the cavity was established. The control results of tilt aberration under different cavity interferences were compared. Experiments show that the control system has good effect on the correction of intracavity tilt aberration for low or quasi-static cavity disturbance.