A laser shaping pulse acquisition device and acquisition method

A laser shaping and acquiring device technology, applied in the laser, laser parts, structure/shape of the active medium, etc., can solve the problems of low laser shaping pulse contrast, insufficient shaping accuracy, contrast and signal-to-noise ratio, etc. It is beneficial to the integrated installation and debugging, the maintenance of the device, and the effect of improving the shaping accuracy.

Active Publication Date: 2021-08-31
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the laser pulse generation system mostly uses a waveguide optical amplitude modulator to perform time-domain shaping on the laser oscillation source. Using a single-stage amplitude modulator can generate laser-shaped pulses with strong time-domain adjustment capabilities. The laser-shaped pulses generated by this method are The contrast is relatively low, and its shaping accuracy, contrast and signal-to-noise ratio are not enough to support the needs of precision physics research

Method used

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  • A laser shaping pulse acquisition device and acquisition method
  • A laser shaping pulse acquisition device and acquisition method
  • A laser shaping pulse acquisition device and acquisition method

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Experimental program
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Effect test

Embodiment 1

[0036] like figure 1 As shown, a laser shaping pulse acquisition device is provided with a seed source 1, a first optical modulator 2, at least one amplifier, at least one acousto-optic switch and a second optical modulator 8 in sequence along the laser signal transmission direction, and the seed The source 1 is used to emit a continuous laser signal of a certain power, the first optical modulator 2 and the second optical modulator 8 are used to modulate the light intensity of the laser signal, and the optical devices are connected by optical fiber jumpers 10 to form an optical link , the laser signal is transmitted flexibly along the optical link, and the performance is reliable and stable.

[0037] It also includes an arbitrary waveform generator 9, which first sends out an initial shaping electrical pulse and loads it to the first optical modulator 2 according to the working sequence, the initial shaping electrical pulse determines the shape of the laser signal, and modulat...

Embodiment 2

[0041] Using the laser shaping pulse acquisition device described in Embodiment 1 to obtain the laser shaping pulse includes the following steps:

[0042] S1: The seed source 1 emits a continuous laser signal with a central wavelength of 1053 nanometers and a power of about 10 milliwatts. The laser signal is injected into the first optical modulator 2 through the optical fiber jumper 10, and the arbitrary waveform generator 9 generates initial shaping electrical pulse and load it to the first light modulator 2, said laser signal is modulated into an initial laser shaped pulse;

[0043] S2: The initial laser shaping pulse is injected into the amplifier 3 for a primary energy boost, injected into the acousto-optic switch 4, filtered out the spontaneous radiation noise after the primary energy boost, injected into the amplifier 5 for a secondary energy boost, injected into the acousto-optic switch 6, and filtered In addition to the spontaneous radiation noise after the second ene...

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Abstract

The invention relates to a laser shaping pulse acquisition device and acquisition method, belonging to the technical field of laser equipment. The acquisition device includes a seed source, a first optical modulator, at least one The amplifier, at least one acousto-optic switch, and the second optical modulator also include an arbitrary waveform generator connected to the first optical modulator and the second optical modulator through radio frequency lines, and the present invention adopts electro-optical modulation technology to cascade two-stage optical In the modulator mode, the time window of the optical modulator is precisely regulated by the electrical pulse generated by the arbitrary waveform generator. At the same time, the amplifier and the acousto-optic switch are used together to control the spontaneous emission noise generated by the amplifier based on the particle number inversion. Preliminary filtering, combined with the use of multi-stage amplifiers to reasonably control the energy flow distribution, significantly improves the shaping accuracy, contrast and signal-to-noise ratio of the output laser shaping pulse.

Description

technical field [0001] The invention belongs to the technical field of laser equipment, and in particular relates to a laser shaping pulse acquisition device and acquisition method. Background technique [0002] In a large-scale high-power laser device, the precise shaping of the continuous laser signal output by the laser oscillation seed source is an essential link. By finely adjusting the shape of the laser signal, it can meet the research needs of different fields such as high-density plasma physics, strong field physics, and "fast ignition". Among them, the contrast of the laser shaping pulse is a very important parameter, especially in During the interaction between the ultra-intense laser signal and the target substance, the leading edge of the laser shaping pulse first irradiates the target substance and generates a pre-plasma, which affects the specific experimental effect. In addition, since the laser shaping pulse needs to continue to be transmitted and amplified...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/107H01S3/067H01S3/117
CPCH01S3/06754H01S3/107H01S3/117
Inventor 宗兆玉许党朋田小程张锐周丹丹范孟秋朱娜谢亮华李宏勋
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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