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Laser pulse high-dynamic range contrast measurement method based on contrast reduction technology

A technology of laser pulse and contrast, applied in the direction of instruments, etc., can solve the problems of low repetition frequency and inability to improve the pulse contrast of the laser system, and achieve the effect of reducing requirements

Active Publication Date: 2019-01-11
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

For PW-level ultra-intense ultrashort laser pulse laser systems, in view of their high power characteristics, extremely low repetition frequency, and even single-shot operation, the existing single-shot contrast measurement method can only reach 10 10 The measurement of the laser system cannot provide any guidance for the improvement and use of the pulse contrast of the laser system with a higher dynamic range

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  • Laser pulse high-dynamic range contrast measurement method based on contrast reduction technology
  • Laser pulse high-dynamic range contrast measurement method based on contrast reduction technology
  • Laser pulse high-dynamic range contrast measurement method based on contrast reduction technology

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention should not be limited thereto.

[0021] Such as figure 1 , in the schematic diagram of the device in the embodiment, the incident light is introduced into the device in the direction indicated by the arrow, and the incident light is divided into two beams by the beam splitter 1 .

[0022] One of the beams of light passes through the flat plate 2, and uses the front and rear surface reflections of the flat plate 2 to introduce a reference small pulse R at the trailing edge of the main pulse of the incident light in the time domain, and introduce the reference small pulse R For the final incident light, use the contrast reducing device 3 (in the present invention, the optical limiting effect or the optical Kerr lens effect is used to reduce the contrast) to reduce the contrast, and obtain the light to be measured with reduced...

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Abstract

The present invention provides a new laser pulse high-dynamic range contrast measurement method based on a contrast reduction technology. The requirement for data collection components in a contrast measurement process is reduced through reduction of the laser pulse contrast to break through the restriction of the limited dynamic range of the collection components per se on the contrast measurement dynamic range so as to achieve the laser pulse high-contrast measurement and provide important parameter supports for improvement and application research of the contrast with high-contrast laser pulse.

Description

technical field [0001] The invention relates to contrast measurement of laser pulses, in particular to a laser high dynamic range pulse contrast measurement method based on contrast reduction technology. Background technique [0002] Ultra-intense and ultra-short laser pulses have important applications in major cutting-edge scientific research fields such as laser particle acceleration, laboratory astrophysics, and plasma physics. The emergence of chirped pulse amplification technology (hereinafter referred to as CPA) has greatly promoted the development of ultra-intense and ultra-short laser systems, with a peak power of petawatts (PW, 10 15 W) level laser systems have been built successively around the world, and 10PW and 100PW ultra-powerful ultra-short laser systems will also be launched one after another, which makes more than 10 21 W / cm 2 The extreme physical conditions of the order of magnitude focus intensity have been realized in the laboratory, which provides a ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 刘军申雄王鹏朱晶鑫
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI