Femtosecond laser pulse shape measuring apparatus

A technology of pulse waveform and measurement device, which is applied in the field of femtosecond laser pulse waveform measurement device, can solve the problems of limited time resolution, and achieve the effects of improving time resolution, convenient adjustment and simple structure

Active Publication Date: 2018-02-09
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0003] In order to overcome the shortage of limited time resolution of the existing measurement technology in femtosecond laser pulse waveform measurement, the present invention provides a femtosecond laser pulse waveform measurement device

Method used

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  • Femtosecond laser pulse shape measuring apparatus
  • Femtosecond laser pulse shape measuring apparatus

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Embodiment 1

[0017] figure 1 It is a schematic diagram of a femtosecond laser pulse waveform measuring device of the present invention; figure 2 It is a schematic diagram of the optical path of the nonlinear crystal component in the present invention, which is figure 1 A side view of the nonlinear crystal assembly in ; image 3 It is a schematic diagram of the optical path of the light guide mirror group in the present invention, which is figure 1 The B-side view of the light guide lens group in , the arrow in the figure indicates the direction of the beam. exist figure 1 , figure 2 , image 3 Among them, in a femtosecond laser pulse waveform measurement device of the present invention, a beamsplitter I1 and a beamsplitter II2 are sequentially arranged in the incident direction of a horizontally polarized spatially uniform femtosecond fundamental frequency laser pulse; the fundamental frequency laser pulse passes through the The beam splitter Ⅰ1 is divided into the transmitted ligh...

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Abstract

The invention discloses a femtosecond laser pulse shape measuring apparatus. In the femtosecond laser pulse shape measuring apparatus, the measured horizontally polarized space-uniform femtosecond fundamental frequency laser pulse is divided into transmitted light and reflected light after passing a spectroscope, and then the transmitted light is divided into two beams so as to be incident on a frequency doubling crystal in a horizontally symmetrical angle, and then a vertically polarized autocorrelation frequency doubling signal is generated; and the frequency doubling signal and the reflected light beam of the spectroscope are incident on a sum frequency crystal along a vertical surface to generate a double delay third order intensity related triple frequency signal so as to obtain the pulse shape information. The femtosecond laser pulse shape measuring apparatus improves the temporal resolution of the measuring technology in femtosecond laser pulse shape measurement. The femtosecondlaser pulse shape measuring apparatus has the advantages of being compact in structure, being convenient for adjustment, and being low in cost.

Description

technical field [0001] The invention belongs to the technical field of ultrafast pulse laser testing, and in particular relates to a femtosecond laser pulse waveform measuring device. Background technique [0002] Pulse waveform is a key indicator of ultrafast laser pulses. Common measuring equipment such as second-order and single-delay third-order correlators can only give the pulse width, but it is difficult to accurately give the pulse shape. They are mainly used to measure the pulse Contrast and approximation give the pulse width; although FROG, SPIDER and their variants can give the shape of the pulse, the calculation is complicated and the pulse width measurement range is limited. A utility model patent named "Laser pulse waveform measurement device based on the third-order correlation method" (patent number: ZL 2016 2 0734206.1) and a utility model patent named "A device for measuring ultrashort laser pulse waveform" (patent number: ZL 2016 2 0733875.7) discloses a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00Y02A90/10
Inventor 夏彦文傅学军董军孙志红卢宗贵张波刘华元浩宇吕嘉坤郑奎兴粟敬钦彭志涛
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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