激光技术Issue(5)：636-641,6.DOI:10.7510/jgjs.issn.1001-3806.2013.05.016
脉冲 CO2激光诱导空气等离子体的光谱诊断
Spectroscopic diagnosis of air plasma induced by pulsed CO2 laser
唐建 1左都罗 1杨晨光 1程祖海1
作者信息
- 1. 华中科技大学武汉光电国家实验室，武汉430074
- 折叠
摘要
Abstract
In order to study the evolution of laser-induced plasma and obtain the properties of plasma , transversely excited atmospheric CO 2 laser was focused by a parabolic reflector to generate air breakdown plasma .Based on the imaging spectrometer system and intensified CCD detector , time-space resolution of laser-induced air plasma were investigated and the time evolution spectra and the space resolution spectra of plasma were obtained .Electron temperature of about 4 ×104 K and electron density of 1018 cm-3 were calculated respectively by using the ratio of oxygen line spectrum and continuous spectrum and full width at half maximum of spectral line .The results show high-energy laser-induced plasma spectra radiate the intense continuous spectra outward , comparing with low-energy laser-induced plasma spectra .At the same time , laser-induced air plasma expands outward rapidly with the way of the laser-supported detonation wave .Due to the shielding effect of laser power , laser-induced air plasma shows the behavior of spatial separation .The results are useful for understanding the interaction between plasma and high-energy laser .关键词
激光技术/光谱学/激光诱导等离子体/时间和空间分辨光谱/电子温度和电子密度Key words
laser technique/spectroscopy/laser-induced plasma/spatio-temporal evolution spectroscopy/electron temperature and electron density分类
数理科学引用本文复制引用
唐建,左都罗,杨晨光,程祖海..脉冲 CO2激光诱导空气等离子体的光谱诊断[J].激光技术,2013,(5):636-641,6.
