High-power liquid cooling pulse solid laser device

A pulsed solid and liquid cooling technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of poor output laser beam quality, larger volume and complexity of laser systems, and limited practicality of lasers. To achieve the effect of sufficient heat dissipation

Pending Publication Date: 2022-01-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

For the extra-cavity laser beam combining method, the volume and complexity of the entire laser system will become larger, which limits the practicality of the laser
For the

Method used

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  • High-power liquid cooling pulse solid laser device
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Experimental program
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Effect test

Embodiment 1

[0026] The laser gain medium uses Nd:YAG crystal, and the saturable absorber uses Cr 4+ :YAG ceramics, heavy water is used as cooling liquid, because the size of ceramics can be made very large in theory, and it will not cause uneven doping ion concentration due to the increase in size like crystals, so Cr 4+ As a saturable absorber, YAG ceramics can increase the laser output power by increasing the number of parallel gain media and the size of the saturable absorber. Both the laser gain medium cooling liquid and the saturable absorber cooling liquid use heavy water. The absorption coefficient of the pump light wavelength is very small, which can reduce the loss in the resonant cavity. In the present invention, the laser can output 1064nm pulsed laser with high average power, high peak power and high beam quality, and can increase the parallel Nd:YAG The number of crystals increases the average power of the output 1064nm pulsed laser.

Embodiment 2

[0028] The laser gain medium uses Nd:YAG crystal, and the saturable absorber uses V 3+ : YAG ceramics, the cooling liquid adopts heavy water, the laser can output 1.3um pulsed laser with high average power, high peak power and high beam quality in the present invention, and the 1.3um pulsed laser output can be increased by increasing the number of parallel Nd:YAG crystals average power.

Embodiment 3

[0030] The laser gain medium adopts Yb:YAG crystal, and the saturable absorber adopts Cr 4+ :YAG ceramics, heavy water is used as cooling liquid, Yb:YAG crystal is pumped by 940nm or 976nm pump source, and the output laser wavelength is 1030nm, which has higher quantum efficiency than Nd:YAG crystal. The heat is smaller and the light-to-light conversion efficiency is higher. In the present invention, the laser can output 1030nm pulse laser with high average power, high peak power and high beam quality, and can increase the output 1030nm by increasing the number of parallel Yb:YAG crystals The average power of the pulsed laser.

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Abstract

The invention provides a high-power liquid-cooling solid pulse laser device, which comprises a rear cavity mirror, a polarizer, a stepped laser window, a pumping source, a stepped pumping window, an output coupling mirror, a saturable absorber and a laser gain medium. According to the invention, the power of output laser is improved in a mode that lath crystals are connected in parallel while a confocal unstable cavity structure is adopted in the height direction of the lath crystals to improve the quality of light beams, and pulse modulation is conducted on the output laser through a saturable absorber, so that the output laser is made to have high average power and high peak power at the same time, and the laser cavity has the advantages of compact structure and simple processing.

Description

technical field [0001] The invention belongs to the technical field of solid-state laser equipment, and in particular relates to a high-power liquid-cooled pulsed solid-state laser. Background technique [0002] Compared with other types of lasers, solid-state lasers have the advantages of stable performance, small size, and low cost, and have important applications in industrial production, scientific research, and military affairs. However, traditional solid-state lasers generally increase the output power by combining laser beams outside the cavity or increasing the aperture of the laser gain medium. For the extracavity laser beam combining method, the volume and complexity of the entire laser system will become larger, thus limiting the practicality of the laser. For the method of increasing the aperture of the laser gain medium, a large beam area will cause high-order modes to oscillate, resulting in poor quality of the output laser beam. Therefore, it is of great sig...

Claims

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Application Information

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IPC IPC(8): H01S3/042H01S3/00H01S3/06H01S3/11
CPCH01S3/0407H01S3/042H01S3/0604H01S3/1118H01S3/0071
Inventor 张百超刘万发
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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