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相干调制成像技术测量高重复频率激光器光学元件热畸变

Measurement of Thermal Distortion of the Optical Element in High Repetition Rate Laser with Coherent Modulation Imaging

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摘要

高功率固体激光器工作在高重复频率时,增益介质因热量的沉积而发生热畸变,导致激光输出波前发生变化。为此,利用相干调制成像技术通过记录单幅衍射光斑实现输出光场的波前测量,获得了放大器工作在1,5,7 Hz频率时光学元件的热畸变相位。实验结果显示,随着工作频率增大,热量向中心区域集中,热沉积效应明显增加了波前变化。

Abstract

When high-power solid laser working in high repetition rate, the laser output wave-front changes due to the thermal distortion, which is caused by the gain medium under the heat deposition. Therefore, the coherent modulation imaging technology is used to realize the measurement of the laser output wave-front from one frame of diffraction intensity recorded. The phases of thermal distortion of the optical element are obtained when the amplifier working in 1, 5, 7 Hz frequency. Experimental results show that thermal distortion effect is significantly increased, the heat is concentrated toward the center region and the phase change increases as the working frequency increases.

补充资料

中图分类号:O436

DOI:

所属栏目:元器件与工程工艺技术

基金项目:中国科学院百人计划(1204341XR0)、惯性约束聚变能源先期关键技术合作研究(2012DFG62040)

收稿日期:2016-05-24

修改稿日期:2016-07-13

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作者单位    点击查看

陶 华:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学, 北京 100049
刘 诚:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
潘兴臣:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学, 北京 100049
黄文发:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
黄庭瑞:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学, 北京 100049
朱健强:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800

联系人作者:陶 华(taohua@siom.ac.cn)

备注:陶 华(1988—),男,博士研究生,主要从事光学测量方面的研究。

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引用该论文

Tao Hua,Liu Cheng,Pan Xingchen,Huang Wenfa,Huang Tingrui,Zhu Jianqiang. Measurement of Thermal Distortion of the Optical Element in High Repetition Rate Laser with Coherent Modulation Imaging[J]. Collection Of theses on high power laser and plasma physics, 2016, 14(1): 1101002

陶 华,刘 诚,潘兴臣,黄文发,黄庭瑞,朱健强。 相干调制成像技术测量高重复频率激光器光学元件热畸变[J]。 高功率激光及等离子体物理研究论文集(专题), 2016, 14(1): 1101002

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