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多脉冲激光诱导熔石英体损伤的时间分辨研究

Time-Resolved Investigation of Multiple-Pulse Laser-Induced Bulk Damage in Fused Silica

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摘要

利用时间分辨激光光度计实时测量纳秒脉冲激光诱导熔石英体损伤过程中的透射、反射和散射变化量;通过在同一区域多次动态测量直至损伤产生,获得了多脉冲累积破坏的时间分辨过程。结果表明:在损伤出现前的脉冲辐照过程中,熔石英透过率已明显下降,后向反射率同步上升,甚至可达70%;后向反射率的上升量与透过率的损失量几乎相同;在多脉冲辐照过程中,只要脉冲辐照中出现后向反射,就会产生损伤;受激布里渊散射对多脉冲诱导熔石英体损伤具有促进作用。

Abstract

In this study, a time-resolved laser photometer was applied to measure the real-time variations in transmission, reflection, and scattering during the nanosecond laser irradiation of bulk fused silica. The time-resolved process of multi-pulse accumulative damage can be obtained via the multiple dynamic measurements in a single region till the damage occurs. The results show that the transmission considerably decreases during the pulse irradiation process prior to the occurrence of damage, and the backward reflectivity simultaneously increases, even up to 70%. The increase in the backward reflectivity is almost equal to the decrease in the transmission. The statistical analysis results show that as long as there exists backward reflection during multi-pulse irradiation, damage can occur. Stimulated Brillouin scattering promotes the multi-pulse-induced damage in bulk fused silica.

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DOI:10.3788/CJL201946.0803001

所属栏目:材料与薄膜

基金项目:国家重点研发计划;

收稿日期:2018-12-26

修改稿日期:2019-02-18

网络出版日期:2019-08-01

作者单位    点击查看

曹珍:中国科学院上海光学精密机械研究所精密光学制造与检测中心, 上海 201800中国科学院大学材料与光电研究中心, 北京 100049
贺洪波:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
胡国行:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
赵元安:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
邵建达:中国科学院上海光学精密机械研究所精密光学制造与检测中心, 上海 201800中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800

联系人作者:贺洪波(hbhe@siom.ac.cn); 胡国行(hbhe@siom.ac.cn);

备注:国家重点研发计划;

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引用该论文

Cao Zhen,He Hongbo,Hu Guohang,Zhao Yuanan,Shao Jianda. Time-Resolved Investigation of Multiple-Pulse Laser-Induced Bulk Damage in Fused Silica[J]. Chinese Journal of Lasers, 2019, 46(8): 0803001

曹珍,贺洪波,胡国行,赵元安,邵建达. 多脉冲激光诱导熔石英体损伤的时间分辨研究[J]. 中国激光, 2019, 46(8): 0803001

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