Huazhong University of Science and Technology

Rongxing Yi

Xiaoyan Zeng

Xiangyou Li

Zhongqi Hao

Jiaming Li

Yongfeng Lu

Lianbo Guo

Xinyan Yang

Provided is a method for inhibiting self-absorption effect of a LIBS, comprising ablating a to-be-measured sample via a pulse laser thereby generating plasma, and selectively stimulating the plasma using a wavelength-tunable laser beam enabling transition of particles in a ground-state in the plasma to high energy state as stimulated absorption, thereby improving a stimulated absorption transition efficiency of the particles in a ground-state, and preventing plasma spectrum from being influenced by self-absorption effect. The invention is capable of eliminating the self-absorption effect without introducing external interference, obtaining original characteristics of emission spectrum from the center of the plasma, and essentially inhibiting and finally eliminating the self-absorption effect of laser plasma by making use of intrinsic physical property of plasma.

Method for inhibiting self-absorption effect in laser-induced breakdown spectroscopy

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Hubei, China

Rongxing Yi