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Updated: May 30, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Development of a nanosecond discharge-enhanced laser plasma spectroscopy
Weidong Zhou1, Kexue Li, Xiafen Li
1The Institute of Information Optics, Zhejiang Normal University, Jinhua, 321004, China. wdzhou@zjnu.cn
Abstract:
A nanosecond pulse discharge circuit is developed and used to enhance the optical emission of laser plasma. An intense discharge spark was observed with a peak discharge current of 1.9 kA and a peak power of 6.5 MW. The main electric energy deposition only lasted for ∼40 ns. An intense optical emission was observed. The line intensity of plasma emission was greatly increased along with an improved signal-to-noise ratio, in comparison with that using a microsecond pulse discharge circuit. From the measured spectra, electron temperature and electron number density were estimated. The mechanism of the optical emission enhancement was briefly discussed.
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