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Updated: Mar 18, 2026
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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
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[Research on Temporal and Spatial Evolution of Reheating Double-Pulse Laser-Induced Plasma]
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|July 13, 2016
Summary
Reheating Double Pulse Laser-Induced Breakdown Spectroscopy (DP-LIBS) significantly enhances plasma emission intensity and temperature in alloy steel analysis. The second laser pulse re-excites the plasma, leading to improved signal detection for specific elements.
Area of Science:
- Spectroscopy
- Laser-induced breakdown spectroscopy (LIBS)
Context:
- Investigating emission enhancement mechanisms in reheating Double Pulse Laser-Induced Breakdown Spectroscopy (DP-LIBS).
- Comparing DP-LIBS with single pulse LIBS (SP-LIBS) on alloy steel samples.
Purpose:
- To understand how reheating DP-LIBS improves plasma emission.
- To analyze the temporal and spatial evolution of plasma generated by SP-LIBS and reheating DP-LIBS.
Summary:
- Reheating DP-LIBS resulted in higher plasma temperatures (~2000 K) and increased plasma dimensions compared to SP-LIBS.
- Emission intensity of Fe II and N I lines was enhanced, particularly at distances >0.6 mm from the sample surface.
- The second laser pulse re-excites the plasma, leading to emission enhancement and a larger hot plasma region.
Impact:
- Provides insights into the mechanisms behind emission enhancement in DP-LIBS.
- Demonstrates the effectiveness of reheating DP-LIBS for improved elemental analysis sensitivity.
- Highlights potential for enhanced detection of specific elements in materials analysis.
