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Cross polarized wave generation device and method based on vortex light

A technology for cross-polarization and device generation, applied in the field of lasers, can solve problems such as ablation, and achieve the effects of improving injection energy, facilitating modularization, and simple device

Pending Publication Date: 2022-03-08
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

[0004] The technical problem to be solved by the present invention is to provide a device and method for generating cross-polarized waves based on vortex light for the front end of a petawatt laser system. Beam quality deterioration avoids nonlinear crystal ablation

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  • Cross polarized wave generation device and method based on vortex light
  • Cross polarized wave generation device and method based on vortex light
  • Cross polarized wave generation device and method based on vortex light

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Embodiment 1

[0037] Please refer to image 3 , image 3 It is a schematic diagram of the device structure of Embodiment 1 of the cross-polarized wave generation device based on vortex light in the present invention. It can be seen from the figure that the vortex light-based cross-polarized wave generation device of the present invention includes: an ultrafast laser source 1 coaxially placed in sequence, a chirped mirror pair 2, a vortex light modulator 3, a polarizer 4, a focusing lens group 5, A nonlinear crystal pair 6 , a collimating lens group 7 , a polarizer 8 and a vortex optical demodulator 9 . The whole device works in a non-vacuum state. The vortex optical modulator 3 described therein comprises a first left-handed λ / 4 wave plate 3-1, a first vortex half-wave plate 3-2 and a first right-handed λ / 4 wave plate 3 coaxially and sequentially placed along the optical path -3; The vortex optical demodulator 9 includes a second right-handed λ / 4 wave plate 9-1, a second vortex half-wave...

Embodiment 2

[0041] Please refer to Figure 4 , Figure 4 It is a schematic diagram of the system structure of Embodiment 2 of the cross-polarized wave generation device based on vortex light in the present invention. It can be seen from the figure that the device of Embodiment 2 of the present invention includes: an ultrafast laser source 1 coaxially placed in sequence, a chirped mirror pair 2, a vortex optical modulator 3, a polarizer 4, a focusing mirror group 5, and a nonlinear crystal pair 6. Collimating lens group 7, analyzer 8 and vortex optical demodulator 9. The whole device works in a non-vacuum state. The vortex optical modulator 3 described therein comprises a first left-handed λ / 4 wave plate 3-1, a first vortex half-wave plate 3-2 and a first right-handed λ / 4 wave plate 3 coaxially and sequentially placed along the optical path -3; The vortex optical demodulator 9 includes a second right-handed λ / 4 wave plate 9-1, a second vortex half-wave plate 9-2 and a second left-handed...

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Abstract

The invention discloses a cross polarized wave generation device and method based on vortex light. The device is mainly composed of an ultrafast laser source, a chirp mirror pair, a vortex light modulator, a polarizer, a focus lens group, a nonlinear crystal pair, a collimating lens group, an analyzer and a vortex light demodulator. According to the invention, the far-field light intensity distribution characteristic of vortex light is utilized, the cross polarization wave of hundred microfocus magnitude can be generated in the air, and the device has the advantages of simple structure, compact device and convenience in modularization. The device is used for the front end of a super-strong and super-short laser system, and has important significance on research and application of the super-strong and super-short laser technology.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a device and method for generating cross-polarized waves based on vortex light. It is a high-energy nonlinear pulse purification technology applied to the front end of petawatt laser system. Its feature is to use the advantage of the far-field energy concentration of the focused spot of vortex light being more dispersed than Gaussian light, combined with the advantages of cross-polarized waves to generate purification pulses and broaden the spectrum, to achieve wide-spectrum, high-contrast, and higher-energy purification in the air Seed pulse output. Background technique [0002] Chirped pulse amplification technology (CPA) and optical parametric chirped pulse amplification technology (OPCPA) are widely applied to several petawatts (1PW=10 15 W) ultra-intense ultra-short laser system. The laser pulse width output by the petawatt laser system is only tens of femtoseconds (1fs=10...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/10G02F1/35
CPCG02F1/3507H01S3/08054H01S3/10061
Inventor 胡家兵王新亮许毅冷雨欣
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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