腔内双压电变形镜光强分布优化

董理治; 雷翔; 刘文劲; 杨平; 晏虎; 许冰

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腔内双压电变形镜光强分布优化

1.
中国科学院光电技术研究所, 自适应光学研究室,成都 61 0209;
2.
中国科学院自适应光学重点实验室, 成都 61 0209;
3.
中国科学院研究生院,北京 1 00084

详细信息

通讯作者:
董理治

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- 文章访问数: 1443
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- 被引次数: 0
出版历程
- 刊出日期: 2012-07-15

Optimization of beam intensity distributions with intracavity bimorph deformable mirror

1.
Laboratory on Adaptive Optics,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;
2.
Key Laboratory on Adaptive Optics,Chinese Academy of Sciences,Chengdu 610209,China;
3.
Graduate University of Chinese Academy of Sciences,Beijing 100084,China

摘要

摘要: 报道了把20单元双压电变形镜作为闪光氪灯泵浦的Nd:YAG激光器的腔镜，优化激光器输出光束远场强度分布的实验结果。变形镜由随机并行梯度下降算法控制，以相机采集到的激光束远场环围能量作为算法的评价指标，控制双压电变形镜的面形向远场能量分布更加集中的方向变化。结果表明：系统在20 s内将远场光斑中的多个亮斑校正为单个亮斑，峰值光强与优化前相比提高了5倍；在腔镜倾斜较大时，实验系统将激光器的输出功率由0.006~0.051 W提升至0.330 W，验证了实验系统的有效性。
- 双压电变形镜 /
- 固体激光器 /
- 自适应光学 /
- 随机并行梯度下降算法
Abstract: An intracavity adaptive optics system is presented for optimizing beam intensity profiles of an flashlamp-pumped Nd:YAG laser. The rear mirror of the laser is replaced by a 20-element bimorph deformable mirror controlled by a stochastic parallel gradient decent algorithm aiming at achieving more concentrated power distribution in the far-field. Experimental results demonstrate that this system effectively transforms the far-field intensity distribution with multiple lobes into a single bright lobe within only about 20 s, and the peak intensity is improved up to 6 times. The output power can be increased from 0.006-0.051 W to 0.330 W when large misalignment exists. The effectiveness of the proposed system is demonstrated by the above experimental results.
- bimorph deformable mirror /
- solid-state laser /
- adaptive optics /
- stochastic parallel gradient decent algorithm