Intracavity transverse modes controlled by a genetic algorithm based on Zernike mode coefficients.
Intracavity transverse modes controlled by a genetic algorithm based on Zernike mode coefficients.
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DOI：
10.1364/oe.15.017051
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发表时间：
2007-12
期刊：
影响因子：
3.8
通讯作者：
Ping Yang;M. Ao;Yuan Liu;Bing Xu;Wen-han Jiang
中科院分区：
文献类型：
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作者：
Ping Yang;M. Ao;Yuan Liu;Bing Xu;Wen-han Jiang
在实验室建立了一套用于控制半导体激光泵浦Nd：YAG固体激光器模式分布的自适应光学系统。采用遗传算法对作为固体激光器后反射镜的19单元压电变形镜（DM）进行控制。为了提高系统的收敛速度，遗传算法优化的前10阶泽尼克模式系数，而不是优化19个电压的DM。推导了19个电压与前10阶Zernike模系数之间的变换矩阵。对比数值结果表明，基于优化Zernike模系数的自适应光学系统的收敛速度和校正性能远优于基于优化电压的自适应光学系统。此外，实验结果表明，该AO系统可以成功地改变TEM（10），TEM（11）和TEM（20）横模到TEM（00）模式。
A new adaptive optics (AO) system for controlling the mode profile of a diode-laser-pumped Nd:YAG solid laser has been set up in our laboratory. A 19-element piezoelectric deformable mirror (DM), which is used as the rear mirror of the solid-state laser, is controlled by a genetic algorithm (GA). To improve the system convergence rate, the GA optimizes the first 10 orders of Zernike mode coefficients rather than optimize 19 voltages on the DM. The transform matrix between the 19 voltages and the first 10 orders of Zernike mode coefficients is deduced. Comparative numerical results show that the convergence speed and the correction performance of the AO system based on optimizing Zernike mode coefficients is far better than that of optimizing voltages. Moreover, experimental results showed that this AO system could change TEM(10), TEM(11), and TEM(20) transverse modes into a TEM(00) mode successfully.