Laser-Induced Breakdown Spectroscopy for Microanalysis Using Submillijoule UV Laser Pulses

2002 ◽  
Vol 56 (6) ◽  
pp. 689-698 ◽  
Author(s):  
G. W. Rieger ◽  
M. Taschuk ◽  
Y. Y. Tsui ◽  
R. Fedosejevs
Keyword(s):  
Laser Pulse ◽  
Laser Pulses ◽  
Laser Induced Breakdown Spectroscopy ◽  
Plasma Emission ◽  
Minor Constituent ◽  
Uv Laser ◽  
Breakdown Spectroscopy ◽  
Low Energies ◽  
Laser Induced Breakdown ◽  
Constituent Elements

This paper presents a study of laser-induced breakdown spectroscopy (LIBS) at low energies using KrF laser pulses of only 50–300 μJ. Very small focal spots with diameters of 5 to 20 μm are employed in order to achieve strong plasma emission. The focused intensities were in the range of 1.6 to 150 GW/cm2. The evolution of the micro-plasma progresses more rapidly in this energy range compared to conventional LIBS using mJ laser pulses. The optimum delay time for the detection of emission from minor constituent elements in aluminum is between 100 and 360 ns after the laser pulse hits the sample. The corresponding limits of detection are in the range of 2 to 450 ppm and are comparable to experiments that have used much higher laser energies. The amount of ablated material is significantly reduced using low laser energies and typical crater diameters are approximately 15–40 μm.

scholarly journals Triple-pulse LIBS: laser-induced breakdown spectroscopy signal enhancement by combination of pre-ablation and re-heating laser pulses

2020 ◽  
Vol 35 (2) ◽  
pp. 293-300 ◽  
Author(s):  
David Prochazka ◽  
Pavel Pořízka ◽  
Jan Novotný ◽  
Aleš Hrdlička ◽  
Karel Novotný ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Pulse Laser ◽  
Laser Pulses ◽  
Signal Enhancement ◽  
Double Pulse ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Double Pulse Laser

The goal of this work is to examine the effect of a third additional laser pulse on orthogonal double-pulse laser-induced breakdown spectroscopy (DP LIBS).

Analysis of Enhanced Laser-Induced Breakdown Spectroscopy with Double Femtosecond Laser Pulses

2015 ◽  
Vol 17 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Jie Shen ◽  
Zhengcai Yang ◽  
Xiaoliang Liu ◽  
Yanchao Shi ◽  
Peixi Zhao ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Determination of carcinogenic fluorine in cigarettes using pulsed UV laser-induced breakdown spectroscopy

2015 ◽  
Vol 54 (17) ◽  
pp. 5560 ◽  
Author(s):  
Mohammed A. Gondal ◽  
Yusuf B. Habibullah ◽  
Luqman E. Oloore ◽  
Mohammed A. Iqbal
Keyword(s):  
Laser Induced Breakdown Spectroscopy ◽  
Uv Laser ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

scholarly journals Feasibility Study on Discrimination of Neo-plastic and Non-Neoplastic Gastric Tissues Using Spark Discharge Assisted Laser Induced Breakdown Spectroscopy

2018 ◽  
Vol 10 (1) ◽  
pp. 64-69 ◽  
Author(s):  
Aida Seifalinezhad ◽  
Maryam Bahreini ◽  
Mohammad Mahdi Hassani Matin ◽  
Seyed Hassan Tavassoli
Keyword(s):  
Light Emission ◽  
In Vitro Study ◽  
Cost Effective ◽  
Laser Pulses ◽  
Spark Discharge ◽  
Plasma Radiation ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Introduction: The present work is a novel in vitro study that evaluated the possibility of diagnosing neoplastic from nonneoplastic gastric tissues using spark discharge assisted laser induced breakdown spectroscopy (SD-LIBS) method. Methods: In these experiments, the low energy laser pulses ablated a tiny amount of tissue surface leading to plasma formation. Then, a spark discharge was applied to plasma in order to intensify the plasma radiation. Light emission from plasma was recorded as spectra which were analyzed. Gastric tissues of 5 people were studied through this method. Results: The SD-LIBS technique had the potential to discriminate normal and cancerous tissues based on the significant differences in the intensities of some particular elements. The comparison of normalized calcium (Ca) and magnesium (Mg) peaks of neoplastic and nonneoplastic gastric tissues could be viewed as a practical measure for tissue discrimination since Ca and Mg peaks in spectra of neoplastic were noticeably higher than nonneoplastic. Conclusion: Considering the identification of gastric cancer, the applied method in these experiments seems quite fast, noninvasive and cost-effective with respect to other conventional methods. The significant increment of specific Ca and Mg lines of neoplastic gastric tissues in comparison to the nonneoplastic ones can be considered as valuable information that might bring about tissue classification. The number of samples in this work, however, was not sufficient for a decisive conclusion and further researches is needed to generalize this idea.

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