工作参数对激光诱导玻璃等离子体特性的影响  

Effects of parameters on spectrum characteristics of laser-induced glass plasma

作　　者：王莉[1,2] 周彧 傅院霞 宫昊[1] 徐吴琪[1] WANG Li;ZHOU Yu;FU Yuan-Xia;GONG Hao;XU Wu-Qing(Faculty of Science,Bengbu College,Bengbu 233030,China;Anhui Province Key Laboratory of Optoelectronic Materials Science and Technology,Wuhu 241000,China)

机构地区：[1]蚌埠学院理学院,蚌埠233030 [2]光电材料科学与技术安徽省重点实验室,芜湖241000

出　　处：《原子与分子物理学报》2020年第4期566-571,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11604003);光电材料科学与技术安徽省重点实验室开放基金(OMST201703);安徽省高校自然科学重点研究项目(KJ2019A0857)。

摘　　要：采用波长532 nm的Nd:YAG纳秒激光器激发诱导空气中的玻璃,由高分辨率的光谱仪和ICCD对等离子体发射光谱采集和实现光电转换.以Si I 288.20 nm、Ca II 393.37 nm两条谱线作为分析线,研究ICCD门延迟,ICCD门宽、聚焦透镜到样品表面的距离(LTSD)对等离子体信号强度和信噪比的影响,确定最优化的实验参数:ICCD门宽1400 ns,ICCD门延迟500 ns,LTSD为84.5 mm.在最优化的实验条件下以Ca元素的六条离子谱线(315.89 nm,317.93 nm,370.60 nm,373.69 nm,393.37 nm,396.85 nm)为分析线,计算得到玻璃等离子体的电子温度和电子密度分别20060 K,8.256×10^16 cm^-3.The glass in the air is excited by a Nd:YAG nanosecond laser with wavelength 532 nm.The collection and photoelectric conversion of the plasma emission spectrum are realized by a high-resolution spectrometer and an ICCD.SiI(288.20 nm)and CaII(393.37 nm)were used as analysis lines to study the effect of ICCD gate delay,ICCD gate width,distance from focus lens to sample surface(LTSD)on plasma signal intensity and signal-to-noise ratio.The optimized experimental parameters are determined:the ICCD gate is 1400 ns wide,the ICCD gate is delayed by 500 ns,and the LTSD is 84.5 mm.Under the optimized experimental conditions,the electron temperature and electron density of glass plasma are calculated by using six ion spectral lines of CaⅡ(315.89 nm,317.93 nm,370.60 nm,373.69 nm,393.37 nm,396.85 nm)as analytical lines.The electron temperature and electron density of glass plasma are calculated at 20060 K and 8.256×10^16 cm^-3,respectively.

关 键 词：激光诱导击穿光谱 玻璃 谱线强度 信噪比 电子温度 电子密度 

分 类 号：O433[机械工程—光学工程] O562[理学—光学]