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960线光谱合束光栅的热畸变分析

Thermal Distortion of 960-Line Spectral Beam Combining Grating

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摘要

前期通过实验和理论研究了960线合束光栅在不同功率密度激光辐照下的表面热畸变及远场光束质量,认为基底受热膨胀是导致合束光栅面形质量和光束质量下降的主要原因,但没有对合束光栅表面热量沉积和远场光束质量如何改善进行分析。通过模型改进分析了合束光栅在不同辐照功率密度下的表面温度、热畸变以及远场光束质量的变化,而且计算分析了基底厚度对合束光栅表面温度、热畸变以及远场光束质量的影响,并得出结论:增加基底厚度有利于提高合束光栅的功率耐受性以及衍射光斑的远场光束质量。

Abstract

In our previous work, the surface thermal distortion and far-field beam quality of 960-line spectral beam combining grating, which is irradiated by laser with different power densities, are studied by experiment and theory. The conclusion is that the thermal expansion of the substrate is the main cause of the distortion of the grating surface and the decrease of the beam quality. However, the improvement of grating surface heat deposition and the far-field beam quality are not considered. In this paper, the surface temperature, thermal distortion of grating and far-field beam quality at different irradiation power densities are analyzed with the improved model. The influences of the substrate thickness on the temperature, thermal distortion and far-field beam quality of the spectral beam combining grating are also calculated and analyzed. The conclusion is that the increase of substrate thickness can improve the power tolerance of beam combining gratings and the far-field beam quality of diffraction spots.

Newport宣传-MKS新实验室计划
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中图分类号:TB131

DOI:10.3788/aos201838.0505002

所属栏目:衍射与光栅

基金项目:国家自然科学基金(11604352,10704079,11604352)、固体激光技术重点实验室基金(61424040104162404002)

收稿日期:2017-10-10

修改稿日期:2017-12-13

网络出版日期:--

作者单位    点击查看

徐姣:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800中国科学院大学, 北京 100049
陈俊明:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800中国科学院大学, 北京 100049
陈鹏:中国科学院大学, 北京 100049
王勇禄:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800
张益彬:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800
孔钒宇:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800
晋云霞:中国科学院上海光学精密机械研究所高能激光材料重点实验室, 上海 201800

联系人作者:晋云霞(yxjin@siom.ac.cn)

备注:徐姣(1994-),男,博士研究生,主要从事光谱合束光栅热畸变方面的研究。E-mail: xujiao@siom.ac.cn

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引用该论文

Xu Jiao,Chen Junming,Chen Peng,Wang Yonglu,Zhang Yibin,Kong Fanyu,Jin Yunxia,Shao Jianda. Thermal Distortion of 960-Line Spectral Beam Combining Grating[J]. Acta Optica Sinica, 2018, 38(5): 0505002

徐姣,陈俊明,陈鹏,王勇禄,张益彬,孔钒宇,晋云霞. 960线光谱合束光栅的热畸变分析[J]. 光学学报, 2018, 38(5): 0505002

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