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Large-range picosecond laser pulse width measuring device

A picosecond laser and pulse width technology, applied in instruments and other directions, can solve the problems of limited measurement range, low time resolution, difficult to combine large range and high resolution measurement, achieve low error measurement, reduce distortion, The effect of eliminating measurement errors

Inactive Publication Date: 2018-07-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Streak cameras can achieve a wide range of pulse width measurements, but the time resolution is low; FROG meters can achieve high-resolution measurements, but their measurement range is limited
It can be seen that in measuring instruments, it is difficult to measure both large range and high resolution. In the existing SG-II petawatt laser device, the picosecond pulse width measuring instrument (referring to CN 104880258 A) has a range of 0.3-15ps and a resolution of 0.05ps. Meet the needs of 0.3-50ps wide-range picosecond laser pulse width measurement

Method used

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  • Large-range picosecond laser pulse width measuring device

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Embodiment Construction

[0029] 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.

[0030] see first figure 1 , figure 1 It is a schematic structure diagram of the wide-range picosecond laser pulse width measuring device of the present invention. As can be seen from the figure, the large-scale picosecond laser pulse width measuring device of the present invention comprises a first beamsplitter 1, a second beamsplitter 8, a first reflector 3, a second reflector 4, a third reflector 5, a fourth Mirror 11, nonlinear crystal 6 (as figure 2 ), cylindrical mirror 12, slit diaphragm 13, first photodetector 14, second photodetector 10 and image processing unit 15, the positional relationship of the above-mentioned components is as follows:

[0031] The first beam splitter 1, the second beam splitter 8, the first reflector 3, the second reflector 4, the third r...

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Abstract

The invention relates to a large-range picosecond laser pulse width measuring device. The device includes a first spectroscope, a second spectroscope, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, a fourth reflecting mirror, a nonlinear crystal, a cylindrical mirror, a slit diaphragm, a first photoelectric detector, a second photoelectric detector and image processing unit. The device can realize the pulse width measurement of the measuring range of 0.3-50 ps.

Description

technical field [0001] The invention relates to laser pulse parameter diagnosis, in particular to a large-scale picosecond laser pulse width measuring device. Background technique [0002] The high-energy petawatt laser provides an important technical means for the study of laser-matter interaction, and has important application value in the fields of high-energy density physics research, inertial confinement fusion (ICF), fast ignition, and advanced ray capability (ARC). There are many high-energy ultrashort pulse laser devices that have been built or are under construction at home and abroad. The OMEGA EP petawatt laser system developed by the University of Rochester in the United States has a pulse width design value of 1-100 ps and a single beam energy of up to 2.6 kJ (see Journal DePhysique IV, 2006, 133(1): 705-707.). The NIF ARC laser system under construction at the Lawrence Livermore National Laboratory (LLNL) in the United States has a total of 8 beam paths, the e...

Claims

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Application Information

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IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 孔雪欧阳小平朱宝强朱健强
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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