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High-overlapping-efficiency direct liquid cooling laser gain device and laser resonant cavity

A technology of laser gain and efficiency, applied in laser cooling devices, structure/shape of optical resonators, lasers, etc., can solve the problems of low utilization rate of gain medium and complex system, reduce Fresnel reflection and reduce complexity the effect of improving the compactness

Active Publication Date: 2020-06-19
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the above existing problems, to provide a direct liquid-cooled laser gain device with high overlapping efficiency, so as to realize the laser vertical The incident gain device satisfies the Brewster angle incidence of the gain medium at the same time, thereby improving the overlapping efficiency of the gain medium and solving the problems of low utilization of the gain medium and complex system

Method used

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  • High-overlapping-efficiency direct liquid cooling laser gain device and laser resonant cavity
  • High-overlapping-efficiency direct liquid cooling laser gain device and laser resonant cavity
  • High-overlapping-efficiency direct liquid cooling laser gain device and laser resonant cavity

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Embodiment 1

[0035] Such as figure 1 As shown, this embodiment discloses a direct liquid-cooled laser gain device with high overlapping efficiency, and its principle is the same as that of a conventional direct liquid-cooled laser gain device, including an incident light-passing mirror 1, a gain medium 2, and an exit light-passing mirror 1' And the laser cooling liquid 3, the gain medium 2 and the laser cooling liquid 3 are located between the incident light-passing mirror 1 and the exit light-passing mirror 1', the gain medium 2 is formed with a cooling liquid channel, and the laser cooling liquid 3 flows through the cooling liquid The flow channel flows through the surface of the gain medium 2 to cool down the temperature of the gain medium 2, and can obtain higher laser gain per unit volume while reducing the heat load of the monolithic medium.

[0036] In the above-mentioned device, at least the incident light-passing mirror 1 is a special-shaped structure, and the angle between the li...

Embodiment 2

[0045] This embodiment discloses the conditions to be satisfied by the design of the angle of the exit surface of the incident light-passing mirror 1 (that is, the angle of the gain medium 2 is determined). The thickness and refractive index of each gain medium 2, the refractive index of the laser cooling liquid 3, and the width of the cooling liquid flow channel are arranged in cooperation with each other, so that the pupil refraction offset of the laser in the gain medium 2 is greater than that of the laser in the laser cooling liquid 3 The pupil refraction offset is the same.

[0046] Such as figure 2 , 3 As shown, set the thickness of the gain medium 2 as d 1 , the channel thickness between the gain medium is d 2 , the refractive index of the gain medium is n 1 , the liquid refractive index n 2 , the tangent angle between the surface a and surface b of the gain medium (the angle between the incident surface and the bottom) is α. In order to meet the pupil refraction...

Embodiment 3

[0055] This embodiment discloses a laser resonant cavity of a direct liquid-cooled laser gain device with high overlapping efficiency based on the above embodiments. Such as Figure 4 As shown, the laser is sequentially provided with a total reflection laser cavity mirror, a first pumping system, a high-overlapping efficiency direct liquid-cooled laser gain device in the above embodiment, a second pumping system, and a laser output mirror along the laser light path direction; the first Both the pumping system and the second pumping system are composed of a pumping source and a dichroic mirror, and the dichromatic mirror is used to transmit the pumping light of the corresponding pumping source, so as to input the pumping light into a high-overlapping efficiency direct liquid-cooled laser gain device , the dichroic mirror also performs total reflection on the laser; the laser output by the total reflection laser mirror is totally reflected by the dichroic mirror of the first pum...

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Abstract

The invention discloses a high-overlapping-efficiency direct liquid cooling laser gain device and a laser resonant cavity. The laser resonant cavity is additionally provided with a double-pumping system on the basis of the laser gain device. The gain device comprises a special-shaped light passing window, a gain medium and laser cooling liquid. The invention aims to overcome the defect of low overlapping efficiency of laser and a gain medium due to pupil shift caused by Brewster angle incidence adopted by a conventional array type direct liquid cooling laser. The pupil self-compensation of thelaser in the gain medium and the cooling liquid is achieved by innovatively designing a crystal cutting angle and a placing mode, and meanwhile, the Brewster angle incidence of the gain medium is metwhile the laser vertically enters the gain device by adopting the special-shaped light passing window with the specific cutting angle. The laser gain device not only effectively improves the effective utilization rate of the gain medium, but also reduces the complexity of a laser system.

Description

technical field [0001] The invention relates to the technical field of high-energy lasers, in particular to a high-overlapping-efficiency direct liquid-cooled laser gain device and a corresponding laser resonator that can realize polarized laser output. Background technique [0002] Thermal management is a key factor affecting laser power, efficiency, and volumetric weight. With the increase of laser output power, the requirements for thermal management are further improved. The conventional heat sink heat dissipation method of solid-state lasers has gradually failed to meet the requirements of efficient and rapid heat dissipation for high-power lasers. In order to meet the heat dissipation requirements, the volume and weight of the heat dissipation structure will inevitably be increased, and the complexity of the system will also be increased. Therefore, it is necessary to design a new heat dissipation method for solid-state lasers and develop new compact solid-state lase...

Claims

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Application Information

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IPC IPC(8): H01S3/04H01S3/042H01S3/08
CPCH01S3/0407H01S3/042H01S3/08
Inventor 易家玉胡浩阮旭涂波尚建力唐淳
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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