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
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  • 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 w

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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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Example Embodiment

[0036] Example 1

[0037] Please refer to image 3 , image 3 A schematic structural diagram of the apparatus of the first embodiment of the present invention based on vortexed cross-polarization wave generating apparatus. As can be seen from the figure, the vortexed cross-polarization wave generating apparatus of the present invention includes: a super fast laser source 1, a clutch 2, a vortex modulator 3, a focaliber 4, a focus mirror group 5, Nonlinear crystal pairs 6, collimation mirror set 7, inspection unit 8, and scroll demodulator 9. The entire device is working in non-vacuum state. The scroll modulator 3 includes a first left λ / 4 wave sheet 3-1, a first scroll half wave sheet 3-2 and a first right λ / 4 wave sheet 3, a first scroll half wave sheet 3-2 and a first right λ / 4 wave sheet 3 -3; The vortexer demodulator 9 includes a second right λ / 4 wave sheet 9-1, a second scroll half wave sheet 9-2 and a second left rhetoric λ / 4 wave sheet 9, respectively -3; The focus ...

Example Embodiment

[0040] Example 2

[0041] Please refer to Figure 4 , Figure 4 A system structure schematic structural example of the first embodiment 2 of the present invention based on vortexed cross-polarization wave generating apparatus. As can be seen from the figure, the apparatus of the second embodiment of the present invention includes: an ultra-fast laser source 1, a 啁啾 mirror pair 2, a vortex modulator 3, a polarizer 4, a focus mirror group 5, a nonlinear crystal pair 6, the collimation mirror group 7, the detector 8 and the scroll demodulator 9. The entire device is working in non-vacuum state. The scroll modulator 3 includes a first left λ / 4 wave sheet 3-1, a first scroll half wave sheet 3-2 and a first right λ / 4 wave sheet 3, a first scroll half wave sheet 3-2 and a first right λ / 4 wave sheet 3 -3; The vortexer demodulator 9 includes a second right λ / 4 wave sheet 9-1, a second scroll half wave sheet 9-2 and a second left rhetoric λ / 4 wave sheet 9, respectively -3; The focus...

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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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