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Single-beam femtosecond probe for diagnosing laser plasma parameters

A laser plasma and plasma technology, applied in the field of plasma, can solve the problem that the probe light cannot adjust the time delay of the probe light, and achieve the effect of high sensitivity and easy operation

Active Publication Date: 2012-09-12
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The main purpose of the present invention is to overcome the problems existing in the above-mentioned prior art, aiming at the application of the interaction between ultrashort and ultra-intense laser and plasma, to provide a single-beam femtosecond probe for diagnosing laser plasma parameters. It overcomes the shortcomings of complex generation of probe light, data error and inability to adjust the time delay of probe light in the prior art, and can accurately measure the plasma parameters in the interaction, with simplicity, ease of operation, and time delay. The advantages of accuracy, high sensitivity and low cost

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  • Single-beam femtosecond probe for diagnosing laser plasma parameters
  • Single-beam femtosecond probe for diagnosing laser plasma parameters
  • Single-beam femtosecond probe for diagnosing laser plasma parameters

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0028] see first figure 1 , figure 1 It is a schematic diagram of the structure of a single-beam femtosecond probe for diagnosing laser plasma parameters in the present invention. It can be seen from the figure that the composition of the single-beam femtosecond probe for diagnosing laser plasma parameters in the present invention is centered on the target point 10 placed in the vacuum target chamber 11 and above the focal point of the off-axis parabolic mirror 20, including the probe points along the optical path. The formation, beam shrinkage and delay adjustment of the needle light and the beam expansion and coherent measurement of the probe light:

[0029] The forming, shrinking, and delay adjustment part of the probe light includes a laser beam splitter 1 sequentiall...

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Abstract

A single-beam femtosecond probe for diagnosing laser plasma parameters through interaction of ultra-short and ultra-strong laser and clusters is composed of a probe light forming, beam-shrinking and delay adjusting portion and a probe light beam-expanding and coherent measurement portion along a light path, wherein the two portions take a target spot located in a vacuum target room and above the focal point of an off-axis cast objective as the center. The single-beam femtosecond probe comprises a laser beam splitter, a laser beam-shrinking system, an optical delay system, a laser beam-expanding system and a laser interference measurement system. The single-beam femtosecond probe has the advantages of simplicity, convenience, easiness in operation, accuracy in delay, high sensitivity, low cost and the like.

Description

technical field [0001] The invention relates to laser plasma, in particular to a single-beam femtosecond probe for diagnosing laser plasma parameters in the interaction between ultrashort intense laser and plasma. Background technique [0002] In recent years, with the development of chirped pulse amplification technology (CPA), lasers can generate ultra-short intense laser pulses in the femtosecond range, and the laser light intensity can reach or even exceed 10 18 W / cm 2 , making the interaction of ultrashort intense laser pulses with matter (gases, solids, and clusters) has become the focus of attention. Ultrashort intense laser pulses interact with matter for a very short time, and the interaction area is very small, so higher requirements are put forward for the diagnosis of the parameters of laser-plasma interaction. [0003] Plasma density and temperature are two important parameters of plasma. The most commonly used method for measuring plasma density is to use las...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24
Inventor 张辉卢海洋李松王成刘建胜李儒新
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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