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Single picosecond pulse signal-to-noise ratio measuring instrument

A picosecond pulse and signal-to-noise ratio technology, applied in the field of single-shot picosecond pulse signal-to-noise ratio measuring instruments, to achieve the effect of high dynamic range signal-to-noise ratio

Inactive Publication Date: 2010-10-20
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

[0003] At present, there is no suitable means to realize the precise measurement of this parameter

Method used

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  • Single picosecond pulse signal-to-noise ratio measuring instrument
  • Single picosecond pulse signal-to-noise ratio measuring instrument

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Embodiment Construction

[0019] 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.

[0020] see first figure 1 , figure 1 It is a simplified structural diagram of a single picosecond pulse signal-to-noise ratio measuring instrument of the present invention. As can be seen from the figure, the single picosecond pulse signal-to-noise ratio measuring instrument of the present invention comprises a double frequency crystal 2, a harmonic separation reflector 3, a fundamental frequency reflector 5, a double frequency reflector 7, a sum frequency crystal 8, Optical imaging system 10, high dynamic range detector 11 and data acquisition and processing system 19, the positional relationship of each component is as follows:

[0021] The incident picosecond level laser pulse 1 to be measured first generates a double frequency pulse 6 through the double frequency crys...

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Abstract

The invention discloses a single picosecond pulse signal-to-noise ratio measuring instrument. Based on the correlative measuring scheme of an optical imaging system, the measuring instrument comprises a frequency doubling crystal, a harmonic separation reflection mirror, a fundamental frequency reflection mirror, a frequency doubling reflection mirror, a sum frequency crystal, an optical imaging system, a detector with high dynamic range and a data acquisition processing system. The invention can realize the high dynamic range signal-to-noise ratio measurement of single picosecond pulse, wherein the time measuring range is 150ps, the time resolution is 3ps and the dynamic range is 108. The invention can realize the signal-to-noise ratio measurement in the high dynamic range of -150ps.

Description

technical field [0001] The invention relates to laser parameter diagnosis, and is a single picosecond pulse signal-to-noise ratio measuring instrument. Background technique [0002] The signal-to-noise ratio of ultrashort pulses is an important parameter in ultrashort and ultraintense laser devices. With the development of laser technology, the focusable power density of the laser focal spot can reach 10 20 W / cm 2 Or higher, and its noise floor will also increase. When the focused spot is used in related physical experiments such as plasma physics and laser-matter interaction, it is hoped that the focused power density of the background noise is less than 10 12 W / cm 2 In order to avoid the generation of plasma by the noise pulse and affect the subsequent interaction between the main laser pulse and the matter. Therefore, the physical experiment requires that the ratio of the power density (intensity) of the main pulse of the ultrashort and ultra-intense laser to the noi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
Inventor 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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