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Picosecond window signal-to-noise ratio measuring device based on space-time infinitesimal regulation and control

A measurement device and a technology for signal-to-noise ratio, which are applied in the field of parameter diagnosis of ultra-short laser pulses, can solve problems such as difficulty in adjusting optical fiber attenuation, and achieve the effect of meeting the needs of the scene

Pending Publication Date: 2022-03-01
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The problem to be solved by the present invention is to provide a solution for high dynamic range electronically controlled attenuation and integrated measurement to meet the engineering and instrumentation application technology in view of the difficulty in adjusting the fiber attenuation in the existing high dynamic range signal-to-noise ratio measurement technology solution need

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  • Picosecond window signal-to-noise ratio measuring device based on space-time infinitesimal regulation and control

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0034] see first figure 1 , figure 1It is a schematic structural diagram of Embodiment 1 of a picosecond window signal-to-noise ratio measurement device based on spatiotemporal microelement regulation of the present invention. The measured pulse 1 is first incident on the beam splitter 2 . The reflected part on the beam splitter 2 enters the scanning pulse generator 3 and is converted into a scanning pulse 4 by the double frequency crystal therein. The scanning pulse 4 is incident on the cross-correlation crystal 12 through the first mirror 5 , the second mirror 6 and the third mirror 7 . The transmitted part on the beam splitter 2 firstly passes through the spatial light modulator 8 to obtain the modulated pulse 9 . After modulation, the pulse 9 is incident on the cr...

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Abstract

The invention discloses a picosecond window signal-to-noise ratio measuring device based on space-time infinitesimal regulation and control. The picosecond window signal-to-noise ratio measuring device comprises a spectroscope, a scanning pulse generator, a reflector group, a spatial light modulator, a reflector, a first imaging lens, a cross-correlation crystal, a second imaging lens, a scientific-grade camera, an image processing unit and a signal modulation unit. On the basis of an amplitude type spatial light modulator, signal intensity attenuation in a dynamic range 106 is realized in a micron-level space unit, and then signal intensity attenuation in an equivalent dynamic range 106 is realized in a femtosecond-level time unit on the basis of a time-space transformation process of a single correlation process; acquisition and processing of signals in a dynamic range 104 are realized based on a high-dynamic-range scientific-grade camera, precise cooperative work is carried out with a spatial light modulator, signal-to-noise ratio measurement in the dynamic range 1010 can be realized, and remote automatic regulation and control of a signal-to-noise ratio measurement device can be realized.

Description

technical field [0001] The invention relates to parameter diagnosis of ultrashort laser pulses, and is a high dynamic range signal-to-noise ratio measurement device for ultrashort pulses, in particular a picosecond window signal-to-noise ratio measurement device based on spatiotemporal microelement regulation. Background technique [0002] The signal-to-noise ratio of ultrashort pulses is an important parameter in ultrashort and ultraintense laser devices. With the development of laser technology, the focusable power density of the laser focal spot can reach 10 20 W / cm 2 Or higher, the noise will also increase. When the focused spot is used in related physical experiments such as plasma physics, laser-matter interaction, etc., it is hoped that the focused power density of the leading edge noise is less than 10 12 W / cm 2 In order to avoid the pre-plasma generated by frontal noise and matter, which will affect the interaction between the subsequent laser main pulse and mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 欧阳小平朱健强潘良泽侯可
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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