激光薄膜损伤中等离子体冲击波特征  

Characteristics of Plasma Shock Waves in Laser-Induced Film Damage

作　　者：苏俊宏[1,2] 吕宁[1] 葛锦蔓[2] 

机构地区：[1]西安工业大学光电工程学院,陕西西安710021 [2]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《中国激光》2016年第12期135-139,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61378050;61205155);科技部国际科技合作项目(2013DFR70620)

摘　　要：在不同位置和激光辐照能量的条件下,采用传声器采集并提取了等离子体冲击波的压强值及其起始时间信息,分析了等离子体冲击波在空气中的传播规律,拟合得到了冲击波声压值与激光辐照能量的关系函数。结果表明,激光等离子体冲击波以球面波形式在空气中进行传播,其声压值与激光辐照能量呈非线性的正相关关系。Under different laser irradiation energies and positions, the pressure value and onset time of laser plasma shock waves are collected and extracted with test microphones, the propagation law of plasma shock waves in air is analyzed, and the relation function between sound pressure value of shock waves and laser irradiation energy is fitted. The results indicate that laser plasma shock waves propagate in the forms of spherical waves and the relationship between their sound pressure values and laser irradiation energy is nonlinear and positive.

关 键 词：薄膜 激光损伤 激光诱导击穿 等离子体冲击波 声谱分析 

分 类 号：O437[机械工程—光学工程]