不同激光波长对铝的LIBS信号影响实验研究  

Experimental study on the influence of different laser wavelengths on aluminum LIBS signal

作　　者：张利 王春霞[1] 刘云朋 ZHANG Li;WANG Chunxia;LIU Yunpeng(Jiaozuo University,School of Mechanical and Electrical Engineering,Jiaozuo Henan 454000,China)

机构地区：[1]焦作大学机电工程学院,河南焦作454000

出　　处：《激光杂志》2025年第3期199-204,共6页Laser Journal

基　　金：河南省科技计划项目(No.232400411191)。

摘　　要：采用激光诱导击穿光谱(LIBS)对铝样品进行烧蚀,研究1 064 nm和532 nm激光对等离子体发射光谱的影响,对比研究了不同激光波长和能量对光谱信号强度的影响,发现1 064 nm更容易激发非金属元素谱线,而532 nm则更容易激发金属元素原子谱线;研究不同能量和波长对信号稳定性的影响,发现光谱稳定性不仅与波长有关,也与激光能量有关;同时开展了激光波长与光谱能级差之间关系的研究,发现532 nm和1 064 nm产生光谱信号相对强度与其能级差呈负相关。合适选择激光波长及能量可以有效提高信号灵敏度和稳定性。Laser induced breakdown spectroscopy(LIBS) was used to ablate aluminum samples,and the influence of 1 064 nm and 532 nm lasers on plasma emission spectra were studied.The influence of different laser wavelengths and energies on spectral signal intensity were compared,it was found that 1 064 nm was more likely to excite non-metallic element spectral lines,while 532 nm was more likely to excite metallic element atomic spectral lines.The influence of different energies and wavelengths on signal stability were studied,it was found that short wavelength(532 nm) signals have better stability,with an average relative standard deviation(RSD) of 0.72 times that of 1 064 nm lasers.At the same time,the relationship between laser wavelength and spectral energy level difference has been studied,and it was found that the relative intensity of spectral signals generated at 532 nm and 1 064 nm is negatively correlated with their energy level difference.Appropriate selection of laser wavelength and energy can effectively improve signal sensitivity and stability.

关 键 词：光谱学 激光波长 激光诱导击穿光谱 信号稳定性 能级差 

分 类 号：O657.33[理学—分析化学]