Ultrafast Process Characterization of Laser-Induced Damage in Fused Silica Using Pump-Probe Shadow Imaging Techniques

被引：3

作者：

Liu, Zhichao ^{[1
]}

Zhang, Jian ^{[1
]}

Wang, Shengfei ^{[1
]}

Geng, Feng ^{[1
]}

Zhang, Qinghua ^{[1
]}

Cheng, Jian ^{[2
]}

Chen, Mingjun ^{[2
]}

Xu, Qiao ^{[1
]}

机构：

[1] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China

[2] Harbin Inst Technol, Ctr Precis Engn, Harbin 150001, Peoples R China

来源：

MATERIALS | 2024年 / 17卷 / 04期

基金：

中国国家自然科学基金;

关键词：

fused silica; laser-induced damage; ultrafast imaging; TRPP; STRESS WAVES; SURFACE; BREAKDOWN; PARTICLES; DYNAMICS; CRACKS; ABSORPTION; DEPENDENCE; MECHANISM; FLUENCE;

D O I：

10.3390/ma17040837

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study delves into the intricate dynamics of laser-induced damage in fused silica using a time-resolved pump-probe (TRPP) shadowgraph. Three typical ultra-fast processes, laser-induced plasma evolution, shockwave propagation and material fracture splashing, were quantitatively investigated. The results indicate that the diameter of plasma is proportional to the pulse laser energy and increases linearly during the pulse laser duration with an expansion rate of approximately 6 km/s. The maximum shockwave velocity on the air side is 9 km/s, occurring at the end of the pulse duration, and then rapidly decreases due to air resistance, reaching approximately 1 km/s around a 300 ns delay. After hundreds of nanoseconds, there is a distinct particle splashing phenomenon, with the splashing particle speed distribution ranging from 0.15 km/s to 2.0 km/s. The particle sizes of the splashing particles range from 4 mu m to 15 mu m. Additionally, the smaller the delay, the faster the speed of the splashing particles. Overall, TRPP technology provides crucial insights into the temporal evolution of laser-induced damage in fused silica, contributing to a comprehensive understanding essential for optimizing the performance and safety of laser systems.

引用

页数：15

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