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Ultrashort laser pulse shape measurement device

A technology of pulse waveform and measuring device, which is applied in the field of ultra-short laser pulse waveform measuring device, can solve the problem of unseen pulse waveform, etc., and achieve the effects of reducing the adjustment links of equal optical path, convenient adjustment and simple structure.

Active Publication Date: 2016-12-07
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

At present, there is no relevant report on the use of double-delay third-order correlation measurement to obtain pulse waveforms in existing domestic patents

Method used

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  • Ultrashort laser pulse shape measurement device
  • Ultrashort laser pulse shape measurement device

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Embodiment 1

[0016] figure 1 It is a schematic diagram of an ultrashort laser pulse waveform measuring device of the present invention, figure 2 It is a side view of the double frequency optical path in the present invention, figure 2 Yes figure 1 A side view of the figure 1 , figure 2 Among them, in an ultrashort laser pulse waveform measuring device of the present invention, a beam splitter 1 is arranged in the incident direction of the high-power laser pulse; the laser pulse is divided into transmitted light and reflected light by the beam splitter 1.

[0017] On the reflected light path of beam splitter 1, there are mirror 2, beam expander collimator mirror 3, double prism 4, frequency doubling crystal 5, and light blocking sheet I6; the reflected light of beam splitter 1 is reflected by mirror 2 to the beam expander The collimator 3 performs beam expansion, and the obtained expanded beam is divided into upper and lower parallel lights by the double prism 4, and is incident on t...

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Abstract

The invention discloses an ultrashort laser pulse shape measurement device. In the device, a detected vertically-polarized parallel laser beam passes through a light splitter and is divided into transmitted light and reflected light, reflected fundamental frequency light is subjected to beam expanding and then is divided by a biprism into upper fundamental frequency light and lower fundamental frequency light which are parallel to each other and which enter a frequency doubling crystal at symmetric angles, then horizontally-polarized frequency-doubled light is generated, time intensity information is converted into intensity autocorrelation one-dimensional space information, the frequency-doubled light and the transmitted light after the light splitter achieve frequency conversion on a frequency conversion crystal, then third-order correlation signal light is generated, the time intensity information is converted into intensity third-order correlation two-dimensional space information, and finally, pulse shape information is obtained though the simple reconstruction technology. The ultrashort laser pulse shape measurement device is low in cost, compact and simple in structure and convenient to adjust, and can measure picosecond and femtosecond pulse shapes.

Description

technical field [0001] The invention belongs to the technical field of ultrashort laser pulse testing, and in particular relates to an ultrashort laser pulse waveform measuring device. Background technique [0002] The pulse time waveform of laser beam is an important index to evaluate the performance of high-power ultrashort laser. For optical pulses shorter than 1 picosecond, the usual method is to estimate the pulse width of ultrashort optical pulses through second-order and single-delay third-order correlation measurements, but it is difficult to accurately give the pulse shape, so the second-order and third-order The correlator is mainly used to measure the contrast of the pulse and approximate the pulse width. The utility model patent (Patent No.: ZL170717077677.0) titled "High Power Ultrashort Laser Pulse Contrast Measurement Device" discloses a method for obtaining pulse contrast by single-delay third-order intensity correlation measurement, named "A The utility mo...

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张波周松元浩宇粟敬钦
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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