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A Heat Sink Applicable to Disc Laser Jet Impact Cooling System

A technology of jet impact and cooling system, which is applied in the direction of lasers, laser parts, semiconductor lasers, etc., can solve the problems of disc laser crystal cracking, increased disc deformation, easily damaged high-reflection film, etc., to reduce thermal resistance and The effect of small deformation and increased strength

Inactive Publication Date: 2021-04-20
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the cooling method of jet directly impacting the disk laser crystal reduces the thermal resistance of the disk laser and increases its heat flux density; this cooling method can minimize the thermal resistance of the heat sink, but it also has the following Disadvantages: First, the direct impact of the jet on the disc laser crystal will cause uneven cooling and cause serious thermal distortion of the disc, or even rupture; second, the strong jet impact pressure can easily cause the disc laser crystal to break; third, direct impact is easy Damage the bad high-reflection film on the back of the disc laser crystal; another method is to add a plate heat sink on the back of the disc laser crystal. However, if the heat sink is too thick, it will cause a large thermal resistance. Reduce its strength, the impact pressure will increase the deformation of the disc, and it will be easily damaged under the impact of high-pressure coolant for a long time

Method used

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  • A Heat Sink Applicable to Disc Laser Jet Impact Cooling System
  • A Heat Sink Applicable to Disc Laser Jet Impact Cooling System
  • A Heat Sink Applicable to Disc Laser Jet Impact Cooling System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The top view of the heat sink provided by Embodiment 1 is as follows figure 1 As shown, the ribs 2 are cylindrical, coaxially arranged in a hexagonal shape on the rib base 1; figure 2 It is the right view of the heat sink provided in Example 1, the bottom surfaces of all the cylindrical fins are located on the same outwardly convex spherical surface, and the fins form a convex cylindrical array; image 3 It is an oblique view of the heat sink provided by Embodiment 1; from this figure, it can be seen clearly that the convex cylindrical array on the lower surface of the heat sink;

[0041] The heat sink provided in Example 1 is made of oxygen-free copper material, and its application in the jet impingement cooling system of a disk laser is as follows: Figure 4As shown, the upper surface of the heat sink is closely attached to the back of the disk laser crystal 3, and the lower surface is aligned with the jet nozzle composed of the nozzle hole array 4 and the nozzle 6,...

Embodiment 2

[0043] The top view of the heat sink provided by embodiment 2 is as follows Figure 5 As shown, the ribs 2 are cylindrical, coaxially arranged in a hexagonal shape on the rib base 1; Figure 6 It is the right side view of the heat sink provided in Example 2, and the bottom surfaces of the cylindrical fins 2 are not on the same plane; Figure 7 It is an oblique view of the heat sink provided in Example 3; it can be clearly seen from this figure that the convex cylindrical bottom surface of the lower surface of the heat sink is located on the same inward concave spherical surface, and all the fins form a concave cylindrical array;

[0044] The heat sink provided in embodiment 2 adopts diamond material, and its application in the jet impingement cooling system of disk laser is as follows: Figure 8 The upper surface of the shown heat sink is close to the back of the disk laser crystal 3, the lower surface is aligned with the jet nozzle composed of the nozzle array 4 and the nozz...

Embodiment 3

[0046] Such as Figure 9 As shown, it is a top view of the heat sink provided in Example 3. The fins 2 are evenly arranged on the rib base 1 in a uniform regular hexagonal arrangement, and the shape of the fins is a prism; as Figure 10 As shown, the bases of all the prisms are located on the same outwardly convex spherical surface, forming a convex prism array; from Figure 11 The convexity of the base of the prism can be clearly seen.

[0047] The heat sink provided in embodiment 3 adopts copper-tungsten alloy material, and its application in the jet impingement cooling system of disk laser is as follows: Figure 12 As shown, the upper surface of the fin heat sink is close to the back of the disk laser crystal 3, the lower surface is aligned with the jet nozzle composed of the nozzle array 4 and the nozzle 6, and the cooling system sleeve is impacted by the jet flow of the disk laser 5 to enclose it; the cooling medium enters the nozzle 6 from the cooling medium inlet 7 un...

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Abstract

The invention discloses a heat sink suitable for a jet impingement cooling system of a disk laser, comprising a rib base and a plurality of ribs distributed on the rib base; the rib base is used as a carrier of the disc laser crystal, and one end surface thereof is used for fixing The other end surface of the disk laser crystal is distributed with coaxially arranged fins; the fins are used to increase the heat dissipation area and reduce the convective heat transfer heat resistance; when the heat sink is applied to the jet impact cooling system of the disk laser, the lower part The surface is cooled by jet impact cooling, and the fins on the lower surface increase the surface area of ​​convective heat transfer and speed up the heat transfer rate; in addition, the fins also increase the strength of the entire heat sink structurally and play a role in dispersing the flow pressure. The role of the disc can reduce the impact deformation.

Description

technical field [0001] The invention belongs to the technical field of laser devices, and more particularly relates to a heat sink suitable for a jet impingement cooling system of a disk laser. Background technique [0002] The disk laser is a high-power solid-state laser, which consists of a disk laser crystal with a thickness of 0.2mm to 0.4mm and is fixed on a metal heat sink. The pump light is incident from the front of the disk laser crystal and cooled on the back of the crystal. Since the disk laser crystal is very thin and has a large diameter-thickness ratio, the cooling effect is good, which is conducive to obtaining high conversion efficiency, high average power and high beam quality. Laser output. However, under the condition of high-power pumping, the disk laser crystal as a gain medium will still generate a lot of useless heat, which will affect the performance of the disk laser. [0003] In order to improve the output power and beam quality of the disk laser,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/042
CPCH01S5/02484
Inventor 朱广志朱晓邵娜王海林齐丽君宋恩茂
Owner HUAZHONG UNIV OF SCI & TECH