大气压非平衡等离子体诊断:电场诱导二次谐波
Research progress of electric field induced second harmonic in atmospheric pressure non-equilibrium plasma
王博 1晋绍珲 2谭昕怡 3卢新培4
作者信息
- 1. 集成电路与微系统全国重点实验室,重庆 401332;中电科奥义健康科技有限公司,北京 100043
- 2. 南京电子技术研究所,江苏 南京 210039;华中科技大学电气与电子工程学院,湖北 武汉 430074
- 3. 中电科奥义健康科技有限公司,北京 100043
- 4. 华中科技大学电气与电子工程学院,湖北 武汉 430074
- 折叠
摘要
电场诱导二次谐波作为一种非侵入式、时间分辨率高达纳秒甚至飞秒量级的测量方法在大气压非平衡等离子的电场诊断中得到广泛关注.基于二次谐波产生的原理,对其适用性进行了讨论.针对纳秒和飞秒激光器在该应用中的特点,搭建了对应的诊断系统.通过使用纳秒激光器测量电场,获得了更高的时间分辨率,并通过平行板电极产生的均匀电场对系统进行标定,获得二次谐波信号强度与电场强度平方的定量关系.基于该定量关系,最终获得大气压等离子体不同位置的瞬态电场.
Abstract
The electric-field-induced second-harmonic(E-FISH),as a non-invasive measurement method with high time resolution of nanosecond or even femtosecond,has received extensive attention in the diagnosis field of non-equilibrium plasma at atmospheric pressure.Based on the principle of second harmonic generation,the applicability of E-FISH was discussed.According to the characteristics of nanosecond and femtosecond lasers in this application,the corresponding diagnostic system was built.A higher temporal resolution was obtained by using nanosecond laser to measure the electric field.The system was calibrated by the uniform electric field generated by parallel plate electrodes,and the quantitative relationship between the second harmonic signal intensity and the square of the electric field intensity was obtained.Meanwhile,the transient electric fields at different positions of the atmospheric pressure plasma were obtained based on the quantitative relationship.
关键词
电场诱导二次谐波/非侵入式/大气压非平衡等离子/纳秒激光器/飞秒激光器Key words
electric-field-induced second-harmonic/non-intrusive/atmospheric pressure non-equilibrium plasma/nanosecond laser/femtosecond laser引用本文复制引用
基金项目
国家重点研发计划(2021YFE0114700)
国家自然科学基金(51625701)
出版年
2024
NETL
NSTL
万方数据