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Multi-pulse laser-induced breakdown spectroscopy measuring method and system

A laser-induced breakdown and spectral measurement technology, applied in the field of lasers, can solve the problems of reducing the energy of a single laser pulse and increasing the complexity of the laser light source system, so as to reduce the construction cost and improve the measurement quality.

Active Publication Date: 2015-08-19
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both of these two methods require beam splitting of the output laser, which reduces the energy of a single laser pulse, and also requires additional optical path layout, which increases the complexity of the laser light source system

Method used

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  • Multi-pulse laser-induced breakdown spectroscopy measuring method and system
  • Multi-pulse laser-induced breakdown spectroscopy measuring method and system
  • Multi-pulse laser-induced breakdown spectroscopy measuring method and system

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Experimental program
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Embodiment 1

[0025] figure 1 It is a flowchart of a multi-pulse laser-induced breakdown spectroscopy measurement method based on a single laser provided in Embodiment 1 of the present invention. Such as figure 1 As shown, the method mainly includes the following steps:

[0026] Step 11. Set the number of output pulses, pulse width and timing parameters of the pulse generator, and the pulse generator sends out corresponding pulse signals to trigger the high-voltage pulse module and the spectrometer to start working.

[0027] The timing of the setting includes: the frequency and trigger time of the xenon lamp trigger signal, the delay between the xenon lamp trigger signal and the first high-voltage pulse signal, the time interval between the high-voltage pulse signals, and the integration delay time of the spectrometer (the pulse generator sends to the high-voltage pulse signal The time interval between the pulse signal of the pulse module and the pulse signal sent to the spectrometer);

...

Embodiment 2

[0045] An embodiment of the present invention provides a multi-pulse laser-induced breakdown spectroscopy measurement system, which is used in the method described in the first embodiment above, such as Figure 5 As shown, it includes: pulse generator (Pulse Generator), high voltage pulse module (HVP Module), laser (Laser), laser pulse processing module and spectrometer (Spectrometer);

[0046] The pulse generator is respectively connected to a high-voltage pulse module and a spectrometer, the high-voltage pulse module is connected to a laser, one end of the laser pulse processing module is connected to the laser, and the other end is connected to the spectrometer.

[0047] The laser pulse processing module includes: a mirror (Mirror), a focusing lens (Focus lens) and a collection lens (Collection);

[0048] The laser pulse output by the laser is focused on the surface of the sample by the focusing lens after being refracted by the mirror, and the generated plasma signal light...

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Abstract

The invention discloses a multi-pulse laser-induced breakdown spectroscopy measuring method and a multi-pulse laser-induced breakdown spectroscopy measuring system. The timing sequence is controlled by utilizing a pulse generator, and external triggering is performed on laser pulses and spectral collection; meanwhile, multi-pulse output is realized by adopting single laser machine, the construction cost for dual-pulse or multi-pulse laser-induced breakdown spectroscopy measuring system is reduced, and the laser-induced breakdown spectroscopy signal measuring quality is improved. Besides, the output laser pulses are multiple collinear pulses, and extra light path alignment and focusing are not required to perform.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a method and system for measuring multi-pulse laser-induced breakdown spectroscopy. Background technique [0002] Multi-pulse laser-induced breakdown spectroscopy technology is to output two or more laser pulses to ablate the sample when the laser induces plasma. Compared with the single-pulse technology, the multi-pulse laser-induced breakdown spectroscopy technology can not only enhance the signal intensity of the characteristic spectrum, improve the detection sensitivity and the signal-to-background ratio of the spectrum, but also reduce the detection limit, and the characteristic spectrum generated at the same time has a smaller relative standard deviation. , which leads to higher accuracy and repeatability. [0003] There are two main methods of multi-pulse output based on a single laser used in LIBS technology. One is to use a beam splitter for beam splitting combined with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
Inventor 高辉潘从元王声波王秋平曾强
Owner UNIV OF SCI & TECH OF CHINA