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Achromatic grating stretcher based on off-axis compensation configuration of total reflection telescopic system

A technology of grating stretcher and telescopic system, which is applied in the field of off-axis compensation type achromatic grating stretcher of total reflection telescopic system, to achieve the effects of reducing phase distortion, increasing peak power, and improving the quality of far-field spots

Active Publication Date: 2020-10-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

This will lead to a certain direction difference (spatial dispersion) of each spectral component after the laser leaves the broadener.

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  • Achromatic grating stretcher based on off-axis compensation configuration of total reflection telescopic system
  • Achromatic grating stretcher based on off-axis compensation configuration of total reflection telescopic system
  • Achromatic grating stretcher based on off-axis compensation configuration of total reflection telescopic system

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] see first figure 2 , as can be seen from the figure, the grating stretcher of the off-axis compensation configuration of the total reflection telescopic system of the present invention includes a grating 1, a concave mirror 3, a roof mirror 5, a prism 6 and a convex mirror 7, and the concave mirror 3 and the convex mirror The mirror 7 forms a coaxial 1:1 total reflection telescopic system off-axis compensation structure, and the grating 1 forms an image grating 8 in the total reflection telescopic system, and the grating 1 and the image grating 8 Parallel to each other to form a pair of parallel gratings with a negative distance between them, the concave mirror 3 is a reflective optical spherical mirror with a radius of curvature 2R, the convex mirror 7 is a reflective optical spherical mirror, and the radius of curvature R of the convex mirror ...

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Abstract

The invention discloses a grating stretcher based on off-axis compensation configuration of a total reflection telescopic system, which comprises a grating, the total reflection telescopic system off-axis compensation structure, a roof mirror and a prism. The off-axis spherical aberration of the total reflection telescopic system is corrected through the spherical surface of a convex mirror, the chromatic aberration of the reflection grating stretcher is eliminated, and the far-field light spot quality of laser beams is remarkably improved. The phase distortion caused by chromatic aberration of an optical system in a grating stretching process can be reduced; the final output pulse of the laser chirped pulse amplifying device can have a wider flat spectral phase, so that the ultra-short pulse width close to the spectral Fourier transform limit is obtained, and finally, the peak power of the output laser pulse of the chirped pulse laser amplifying device is improved.

Description

technical field [0001] The invention relates to a laser chirped pulse amplification system, in particular to an off-axis compensation type achromatic grating stretcher for a total reflection telescopic system of a femtosecond laser pulse with a wide spectrum. Background technique [0002] "Ultra-strong and ultra-short" means that the time width of the laser pulse is as short as less than 100 femtoseconds (femtoseconds, that is, 10 -15 s, abbreviated as fs), the peak power is as high as 100 terawatts or more (terawatts, that is, 10 12 W, abbreviated as TW). [0003] The chirped pulse laser amplification device can realize ultra-intense ultra-short pulse output, and is the basic equipment in the field of ultra-intense ultra-short laser science research. It adopts the Chirped Pulse Amplification (CPA) method as the basic technical route, which can realize ultra-intense and ultra-short laser pulse output. A typical solution takes a Ti:Sapphire laser system using CPA technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/00G02B27/44G02B27/09
CPCG02B27/0944G02B27/0972G02B27/44H01S3/0057
Inventor 王乘刘星延冷雨欣李儒新
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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