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Laser pulse shape measurer based on third-order correlation method

A laser pulse and waveform measurement technology, applied in the direction of instruments, etc., can solve the problems of limited pulse width measurement range and complicated calculation, and achieve the effect of increasing the time measurement range, simple structure and low cost.

Active Publication Date: 2016-10-26
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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AI Technical Summary

Problems solved by technology

Although FROG and its variants can measure the shape of the pulse, the calculation is complicated and the pulse width measurement range is limited

Method used

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  • Laser pulse shape measurer based on third-order correlation method
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Embodiment 1

[0016] figure 1 It is a schematic diagram of the optical path of the laser pulse waveform measurement device based on the third-order correlation method of the present invention, figure 2 It is a schematic diagram of the optical path of the light guide mirror group in the present invention, which is figure 1 A side view of the light guide lens group in . exist figure 1 , figure 2 Among them, in the laser pulse waveform measurement device based on the third-order correlation method of the present invention, a beam splitter 1 and a half-mirror 2 are sequentially arranged on the incident direction of the high-power laser pulse; light and reflected light, the transmitted light is divided into transmitted light and reflected light again by the half mirror 2; in the reflected light path of the half mirror 2, a reflector I3, a frequency doubling crystal 6, and a light blocking sheet I7 are arranged in sequence, On the transmitted light path of the half-mirror 2, a delay regulat...

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Abstract

The invention discloses a laser pulse shape measurer based on a third-order correlation method. Measured parallel laser beams are converted into transmission light and reflection light through a light splitter, the transmission light is converted into transmission light and reflection light through a semitransparent mirror, the transmission light and the reflection light are converted into frequency doubled light through a frequency doubling crystal, the time strength information is converted into the strength autocorrelation one-dimensional space information, the frequency doubled light beam and a reflection light beam after passing through the light splitter are converted through the frequency doubling crystal to realize frequency-tripled conversion, and the time strength information is converted into the strength third-order correlation two-dimensional space information. According to the measurer, through the simple reconstruction technology, not only can the pulse width information be acquired, but also the pulse waveform information can be accurately acquired, and picosecond and femtosecond pulse waveforms can be processed. The measurer has advantages of low cost, simple structure and convenient adjustment.

Description

technical field [0001] The invention belongs to the technical field of ultrashort laser pulse testing, and in particular relates to a laser pulse waveform measuring device based on a third-order correlation method. Background technique [0002] At present, the pulse width of ultrashort laser pulses is generally inferred by measuring the second-order and single-delay third-order intensity correlation functions. However, only the measurement of the second-order and single-delay third-order intensity correlation functions cannot determine the shape of the pulse, so Second-order and third-order correlators are mainly used to measure the contrast of pulses. The utility model patent (Patent No.: ZL 170717077677.0) titled "High Power Ultrashort Laser Pulse Contrast Measurement Device" discloses a single-delayed third-order G (3) (τ) Intensity correlation function to obtain pulse contrast measurement method, the utility model patent (patent number: ZL 1710 2 0293160.8) named "A sin...

Claims

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Application Information

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IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 夏彦文孙志红彭志涛傅学军卢宗贵张波粟敬钦朱启华
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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