中国激光, 2019, 46 (9): 0911003, 网络出版: 2019-09-10
溶液中Ba元素的水下单脉冲与正交双脉冲LIBS的比较研究 
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Comparative Study of Underwater Single Pulse and Orthogonal Double Pulse Laser-Induced Breakdown Spectroscopy of Barium Element in Solution
图 & 表
图 1. 水下正交DP-LIBS实验装置图
Fig. 1. Schematic of experimental setup for underwater orthogonal DP-LIBS
图 3. 采集延时对SP-LIBS的影响。(a)不同采集延时下的SP-LIBS;(b) SP-LIBS谱线强度与SNR随采集延时的变化
Fig. 3. Effect of acquisition delay time on SP-LIBS. (a) Spectra of SP-LIBS at different acquisition delay time; (b) intensity and SNR of Ba II 455.4 nm as a function of acquisition delay time in SP-LIBS
图 4. 采集延时对DP-LIBS的影响。(a)不同采集延时下的DP-LIBS;(b) DP-LIBS谱线强度与SNR随采集延时的变化
Fig. 4. Effect of acquisition delay time on DP-LIBS. (a) Spectra of DP-LIBS at different acquisition delay time; (b) intensity and SNR of Ba II 455.4 nm as a function of acquisition delay time in DP-LIBS
图 5. 双脉冲激光焦点相对位置示意图(图中1st 箭头表示第一束激光,2nd箭头表示第二束激光)
Fig. 5. Schematic of relative position of two laser foci (1st arrow represents first laser beam, 2nd arrow represents second laser beam)
图 6. 两束激光焦点相对位置ΔX对DP-LIBS的影响。(a)不同ΔX对应的DP-LIBS的光谱图;(b) Ba元素谱线强度随ΔX的变化
Fig. 6. Effect of relative position of two laser foci on DP-LIBS. (a) Spectra of DP-LIBS corresponding to different ΔX; (b) intensity of Ba II 455.4 nm as a function of ΔX
图 7. Ba元素谱线强度随单脉冲激光能量的变化
Fig. 7. Intensity of Ba II 455.4 nm as a function of laser energy in SP-LIBS
图 8. Ba元素谱线强度随双脉冲E1的变化
Fig. 8. Intensity of Ba II 455.4 nm as a function of first laser energy in DP-LIBS
图 9. E2对DP-LIBS的影响。(a)不同的E2对应的DP-LIBS光谱图;(b) Ba元素谱线强度随双脉冲E2的变化
Fig. 9. Effect of the second laser energy on DP-LIBS. (a) Spectra of DP-LIBS corresponding to different second laser energies; (b) intensity of Ba II 455.4 nm as a function of the second laser energy in DP-LIBS
图 10. 优化条件下的LIBS光谱图。(a) SP-LIBS;(b) DP-LIBS
Fig. 10. LIBS spectra obtained under optimized experimental conditions. (a) SP-LIBS; (b) DP-LIBS
图 11. 水下SP-LIBS与DP-LIBS(td=1.2 μs)
Fig. 11. Spectra of underwater SP-LIBS and DP-LIBS (td=1.2 μs)
李文平, 周卫东. 溶液中Ba元素的水下单脉冲与正交双脉冲LIBS的比较研究[J]. 中国激光, 2019, 46(9): 0911003. Li Wenping, Zhou Weidong. Comparative Study of Underwater Single Pulse and Orthogonal Double Pulse Laser-Induced Breakdown Spectroscopy of Barium Element in Solution[J]. Chinese Journal of Lasers, 2019, 46(9): 0911003.
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