CN117673870A - Laser gain medium heat radiation module - Google Patents
Laser gain medium heat radiation module Download PDFInfo
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- CN117673870A CN117673870A CN202311714163.1A CN202311714163A CN117673870A CN 117673870 A CN117673870 A CN 117673870A CN 202311714163 A CN202311714163 A CN 202311714163A CN 117673870 A CN117673870 A CN 117673870A
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- 230000005855 radiation Effects 0.000 title description 2
- 238000001816 cooling Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000009792 diffusion process Methods 0.000 claims abstract description 29
- 230000017525 heat dissipation Effects 0.000 claims abstract description 28
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 229910052738 indium Inorganic materials 0.000 claims description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 5
- 239000013078 crystal Substances 0.000 description 9
- 238000013016 damping Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The invention relates to a laser gain medium heat dissipation module, comprising: the water inlet manifold comprises a mixing zone, a front nozzle and a diffusion zone which are sequentially connected, and the flow cross section of the diffusion zone is smaller than that of the mixing zone and larger than that of the front nozzle; the cooling flow passage is connected with the diffusion area at the upstream, and the flow cross section is smaller than that of the diffusion area; the drainage manifold comprises a convergence area, a rear nozzle and a release area which are sequentially connected, the overflow section of the convergence area is smaller than that of the release area and larger than that of the rear nozzle, the upstream of the convergence area is connected with the downstream of the cooling flow channel, and the overflow section is larger than that of the cooling flow channel. The laser gain medium is arranged on one side of the cooling flow channel, turbulent flow flows through the cooling surface of the laser gain medium, and the cooling surface of the laser gain medium is parallel to the turbulent flow direction. The invention makes the heat conductivity of the cooling surface of the laser gain medium more uniform, and reduces the influence of the water flow longitudinal wave on the laser gain medium.
Description
Technical Field
The invention relates to the technical field of laser heat dissipation, in particular to a laser gain medium heat dissipation module.
Background
A common cooling scheme for gain media suitable for high power high energy disc lasers is an array jet, typically with one or more sets of nozzles arranged on the back side of the gain medium, with the cooling medium impinging on the gain medium. If distilled water is used as the cooling medium at room temperature, in order to ensure that the gain medium can stably run at room temperature, the water flow speed of the cooling surface of the gain medium needs to be greater than 1.2m/s, and the Reynolds number Re is ensured to be greater than 3500, so that the sufficient heat exchange rate can be realized. Because the adopted pump light has smaller size (the diameter is 5-15 mm), if an array jet flow scheme is adopted, more nozzles are required to be arranged in a small range, standing points are difficult to avoid, and the deformation of output light spots is caused by uneven heat conductivity. Meanwhile, due to the mechanical characteristics of the water cooler, the water cooler with reasonable cost capable of achieving the required output water flow pressure and flow speed often adopts a mechanical water pump, and due to the fact that the water flow output to the gain medium is large, longitudinal wave vibration of the water flow output by the water cooler is transmitted to the gain medium, the amplified laser directivity is unstable easily.
Disclosure of Invention
Accordingly, in order to solve the above-mentioned problems, it is necessary to provide a laser gain medium heat dissipation module having a relatively uniform thermal conductivity and capable of effectively reducing longitudinal wave vibration.
The invention provides a laser gain medium heat dissipation module, which comprises:
the water inlet manifold comprises a mixing zone, a front nozzle and a diffusion zone which are sequentially connected, wherein the flow cross section of the diffusion zone is smaller than that of the mixing zone and larger than that of the front nozzle;
a cooling flow passage, wherein the upstream is connected with the diffusion region, and the flow cross section is smaller than that of the diffusion region;
the drainage manifold comprises a convergence zone, a rear nozzle and a release zone which are sequentially connected, the flow cross section of the convergence zone is smaller than that of the release zone and larger than that of the rear nozzle, the upstream of the convergence zone is connected with the downstream of the cooling flow channel, and the flow cross section of the convergence zone is larger than that of the cooling flow channel;
the laser gain medium is arranged on one side of the cooling flow channel, turbulent flow flows through the cooling surface of the laser gain medium, and the cooling surface of the laser gain medium is parallel to the turbulent flow direction.
In one embodiment, the cooling channel is a flat channel, and the orthographic projection of the cooling surface of the laser gain medium falls into the cooling channel.
In one embodiment, the heat dissipation module includes a body and a fixing member, the mixing region, the front nozzle, the rear nozzle and the release region are disposed in the body, the fixing member has a light-passing hole, the laser gain medium is mounted in the light-passing hole, and the fixing member is mounted on the body and forms the diffusion region, the cooling flow channel and the convergence region with the body.
In one embodiment, the body has an inner recess having regions corresponding to the diffusion region, cooling flow passage, convergence region, respectively.
In one embodiment, the body has a flow channel gasket disposed in a region corresponding to the cooling flow channel.
In one embodiment, the outlet of the front nozzle is located in a region corresponding to the diffusion region, the inlet of the front nozzle extends to the mixing region, the inlet of the rear nozzle is located in a region corresponding to the convergence region, and the outlet of the rear nozzle extends to the release region.
In one embodiment, the fixing member includes a first fixing piece and a second fixing piece, the light passing hole includes a front window and a rear window, the front window is located on the first fixing piece, the rear window is located on the second fixing piece, the size of the front window is smaller than that of the rear window, a flange is arranged at the bottom of the rear window, the laser gain medium is installed in the rear window and is borne on the flange, and the first fixing piece is fixed on the second fixing piece and compresses the laser gain medium.
In one embodiment, an annular groove is formed in one side of the flange, opposite to the first fixing piece, and indium wires are embedded in the annular groove.
In one embodiment, the thickness of the turbulence of the cooling flow channel section where the laser gain medium is located is not less than 0.1 mm.
According to the laser gain medium heat dissipation module, the front nozzle and the rear nozzle are respectively arranged at the upstream and the downstream of the cooling flow channel, so that the cooling water still maintains a higher Reynolds number and a turbulent state when flowing through the cooling surface of the laser gain medium, and therefore higher heat dissipation efficiency is maintained, and the cooling water of the cooling surface of the laser gain medium is uniform and has uniform heat conductivity; meanwhile, due to the structure of the water inlet manifold, cooling water entering in a laminar flow mode is subjected to high and concentrated friction resistance when passing through the nozzle, and the influence of water flow longitudinal waves generated by the mechanical water pump on the laser gain medium is reduced.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, a brief description will be given below of the drawings used in the embodiments or the description of the prior art, it being obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a laser gain medium heat dissipation module according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a laser gain medium heat dissipation module according to an embodiment of the present invention;
FIG. 3 is another schematic view of the laser gain medium heat dissipation module of the embodiment of FIG. 1;
FIG. 4 is a schematic diagram of a body of the laser gain medium heat dissipation module of FIG. 1;
FIG. 5 is a cross-sectional view of the body of the laser gain medium heat dissipation module of FIG. 1;
FIG. 6 is an enlarged view of portion A of FIG. 1;
fig. 7 is an enlarged view of a portion B in fig. 1.
Reference numerals:
100. a body; 110. a water inlet manifold; 112. a mixing zone; 114. a front nozzle; 116. a diffusion region; 120. a cooling channel; 130. a drain manifold; 132. a convergence region; 134. a rear nozzle; 136. a release zone; 140. an inner concave portion; 150. a flow channel gasket; 200. a fixing member; 210. a light-transmitting hole; 212. a front window; 214. a rear window; 220. a first fixing piece; 230. a second fixing piece; 242. a flange; 234. an annular groove; 236. sinking grooves; 50. a laser gain medium.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present invention for the purpose of illustration only and do not represent the only embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
Unless defined otherwise, all technical and scientific terms used in the specification of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in the description of the present invention includes any and all combinations of one or more of the associated listed items.
Yb: YAG crystals have found more use in high power and high energy laser systems in recent years due to their longer upper energy level lifetime, suitable absorption bandwidth and relatively high thermal conductivity in various gain media. When used as a gain medium, about 11% of the pump light energy will be applied as a quantum deficit to the laser gain region; in a high energy laser system of the order of 100mJ (millijoules), due to design constraints, 31-42% of the pump light energy is absorbed as fluorescence by the surrounding cladding or anti-spontaneous emission material of the crystal, depending on the design specifications. In these application scenarios, yb: the thermal conductivity of YAG can not meet the requirement of effectively taking away the heat, so that a larger temperature gradient in the crystal is brought, the quality of light spots is affected, and the crystal is cracked when serious. Good thermal management is therefore one of the core technologies that such laser systems can function properly.
To achieve 100 mJ-1J monopulse energy, 100 Hz-level laser amplification, the gain region of the laser gain medium needs to bear no less than 600W/cm 2 Pumping optical power. One common heat dissipation design for achieving high flux density is to solder the crystal onto a material of high thermal conductivity or coefficient of thermal expansion matching (e.g., diamond or tungsten copper alloy), but this introduces additional system complexity and increased cost. Another common crystal cooling scheme suitable for high power high energy disc lasers is an array jet, typically with one or more sets of nozzles arranged on the back side of the crystal, with a cooling medium to impinge on the crystal. If it isDistilled water is used as cooling medium at room temperature, so that the gain medium can stably run at room temperature, the water flow speed of the cooling surface of the gain medium is required to be higher than 1.2m/s, and the Reynolds number Re is ensured>3500, a sufficient heat exchange rate can be achieved. Because the pump light size is smaller (the diameter is 5-15 mm), if an array jet flow scheme is adopted, because more nozzles are required to be arranged in a small range, standing points are difficult to avoid, and the deformation of output light spots is caused by uneven heat conductivity. Meanwhile, due to the mechanical characteristics of the water cooler, the water cooler with reasonable cost capable of achieving the required output water flow pressure and flow speed often adopts a mechanical water pump, and due to the fact that the water flow output to the gain medium is large, longitudinal wave vibration of the water flow output by the water cooler is transmitted to the gain medium, the amplified laser directivity is unstable easily.
Based on the technical problems, the invention provides a laser gain medium heat dissipation module.
The laser gain medium heat dissipation module of the present invention is described below with reference to fig. 1 to 7.
As shown in fig. 1 to 7, in one embodiment, a laser gain medium heat dissipation module includes a water inlet manifold 110, a cooling flow channel 120, and a water outlet manifold 130.
The water inlet manifold 110 includes a mixing zone 112, a front nozzle 114, and a diffusion zone 116 connected in sequence, the diffusion zone 116 having an flow cross-section smaller than the mixing zone 112 and larger than the front nozzle 114. Upstream of the mixing zone 112 is a water inlet 111. Water enters from the water inlet 111, passes through the mixing zone 112, and enters the diffusion zone 116 from the front nozzle 114. Alternatively, the front nozzles 114 are arranged in parallel at equal intervals, the mixing area 112 is arranged in a column shape, and the axial direction of the column-shaped mixing area 112 is parallel to the plane of the front nozzles 114, so as to ensure that the flow rate of the water flowing from the mixing area 112 into each front nozzle 114 is uniform, and the flow rate of the water flowing from each rear nozzle 114 into the diffusion area 116 is uniform. The mixing zone 112 has a larger flow cross section than the water inlet 111.
The cooling flow passage 120 is connected to the diffusion region 116 upstream thereof, and the flow cross section of the cooling flow passage 120 is smaller than that of the diffusion region 116.
The drain manifold 130 includes a converging region 132, a rear nozzle 134 and a discharge region 136 connected in sequence, wherein the flow cross section of the converging region 132 is smaller than the flow cross section of the discharge region 136 and larger than the flow cross section of the rear nozzle 134, and the upstream of the converging region 132 is connected with the downstream of the cooling flow channel 120 and the flow cross section is larger than the flow cross section of the cooling flow channel 120. Downstream of the relief zone 136 is a water outlet 131. Alternatively, the rear nozzles 134 are arranged in parallel at equal intervals, the apertures, lengths and numbers of the rear nozzles 134 are the same as those of the front nozzles 114, the discharge areas 136 are columnar, and the axial directions of the columnar discharge areas 136 are parallel to the planes of the rear nozzles 136, so that the uniform flow rate of water flowing from the convergence areas 132 into each rear nozzle 134 is ensured, and the uniform flow rate of water flowing from each rear nozzle 134 into the discharge areas 136 is ensured. The discharge zone 136 has an equal flow cross section as the mixing zone 112. The discharge area 136 has a larger flow cross section than the water outlet 131.
The laser gain medium 50 is disposed at one side of the cooling flow channel 120, the turbulent flow flows through the cooling surface of the laser gain medium 50, and the cooling surface of the laser gain medium 50 is parallel to the turbulent flow direction.
The front nozzle 114 and the rear nozzle 134 function as damping holes when water flows therethrough. When a water flow with longitudinal waves propagates through the damping hole, the structure in the hole causes energy loss such as friction and vortex in the fluid. These losses result in gradual conversion of the fluctuating energy into thermal energy, thereby slowing the amplitude and frequency of the vibrations to the effect of reducing the impact. The orifice is typically a small, fixed, elongated orifice of small diameter. The fluid is generally in a laminar flow state when flowing through the damping hole, the flow rate passing through the damping hole is in direct proportion to the pressure difference between the front and the rear of the hole (not in square root relation with the thin wall hole), in inverse proportion to the kinematic viscosity and the length, and in direct proportion to the fourth power of the diameter. The flow formula of the damping hole is as follows:
in the formula, all physical quantities are measured in international units, Q is flow, d is damping hole diameter, delta p is pressure difference before and after the hole, mu is viscosity coefficient, and L is small hole diameter.
For a longitudinal wave with amplitude A and angular frequency omegaThe flow rate change after the orifice is inversely proportional to the fourth power of the orifice diameter. Through tests, the laser directional vibration can be smaller than 7 mu rad by adopting a damping hole with the diameter d=2 mm and the length-diameter ratio of 1.5 as a nozzle, so that the requirement can be met. To ensure uniform flow through each orifice, the water inlet and outlet sides are provided with mixing zones 112 and discharge zones 136 so that the outlet flow from the edge positioned nozzles and the center positioned nozzles are uniform.
In the laser gain medium heat dissipation module, the front nozzle 114 and the rear nozzle 134 are respectively arranged at the upstream and downstream of the cooling flow channel 120 and are used as turbulence generators and controlling the length of the diffusion section, so that the cooling water still maintains a higher Reynolds number and a turbulent state when flowing through the cooling surface of the laser gain medium, thereby maintaining higher heat dissipation efficiency, and the cooling water of the cooling surface of the laser gain medium 50 is more uniform and has more uniform heat conductivity; meanwhile, the structure of the water inlet manifold 110 ensures that the cooling water entering in laminar flow is subjected to high and concentrated friction resistance when passing through the nozzle, and reduces the influence of the longitudinal wave of the water flow generated by the mechanical water pump on the laser gain medium 50.
In this embodiment, the cooling flow channel is a flat flow channel, and the orthographic projection of the cooling surface of the laser gain medium 50 falls into the cooling flow channel. The flat flow channels provide a more uniform flow and thermal conductivity of water flowing across the cooling surface of the laser gain medium 50.
In this embodiment, the heat dissipation module includes a main body 100 and a fixing member 200, in which the mixing region 112, the front nozzle 114, the rear nozzle 134 and the release region 136 are disposed, the fixing member 200 has a light-passing hole 210, the laser gain medium 50 is mounted in the light-passing hole 210, and the fixing member 200 is mounted on the main body 100 and forms a diffusion region 116, a cooling flow channel 120 and a convergence region 132 with the main body 100. The outlets of the front nozzles 114 are located in the region corresponding to the diffusion region 116, the inlets of the front nozzles 114 extend to the mixing region 112, the inlets of the rear nozzles 134 are located in the region corresponding to the convergence region 132, and the outlets of the rear nozzles 134 extend to the discharge region 136. When the mixing region 112 and the releasing region 136 are manufactured on the body 100, a through hole is opened from one side surface to the other side surface of the body 100, and then both ends of the through hole are closed by adopting interference fit water plugs, so that the mixing region 112 or the releasing region 136 is formed.
The body 100 has an inner recess 140, and the inner recess 140 has regions corresponding to the diffusion region 116, the cooling flow passage 120, and the convergence region 132, respectively. The body 100 has a flow path gasket 150, and the flow path gasket 150 is disposed in a region corresponding to the cooling flow path 120 and is fixed by a countersunk screw. By adjusting the thickness of the flow channel spacer 150, the thickness of the cooling flow channel 120 can be adjusted, and the area parallel between the flow channel spacer 150 and the cooling surface of the laser gain medium 50 is the effective heat dissipation area. Preferably, the thickness of the cooling flow channel 120 is less than 0.1 mm.
In this embodiment, the fixing member 200 includes a first fixing piece 220 and a second fixing piece 230, the light-transmitting hole 210 includes a front window 212 and a rear window 214, the front window 212 is located on the first fixing piece 220, the rear window 214 is located on the second fixing piece 230, the size of the front window 212 is smaller than that of the rear window 214, the bottom of the rear window 214 has a flange 232, and the laser gain medium 50 is mounted in the rear window 214 and is carried on the flange 232. The second fixing piece 230 is provided with symmetrically and respectively sinking grooves 236 at the edge of the rear window 214, so that the first fixing piece 220 of the laser gain medium 50 can be conveniently installed or taken out, and the first fixing piece 230 is fixed on the second fixing piece 230 and compresses the laser gain medium 50.
An annular groove 234 is formed on one side of the flange 232 opposite to the first fixing piece 220, and indium wires are embedded in the annular groove. The indium wires play a role in sealing the edges of the laser gain medium 50, cover the gaps at the edges of the laser gain medium 50 after the indium wires are deformed, and provide sufficient contact between the edge wrapping of the laser gain medium 50 and the heat sink so as to take away the waste heat in the material of the edge wrapping of the laser gain medium 50. Alternatively, the laser gain medium 50 is Yb of a thick disc: YAG laser crystals.
Through hydrodynamic simulation of the flow channel, when the flow rate of the water flowing through the flow channel reaches the minimum required value of 2.6L/min, the Reynolds number close to the cooling surface in the cooling flow channel 120 reaches the turbulence boundary condition Re>3500, at which time the flow rate is 0.9m/s, boundary layer thickness for heat exchange>0.5mm, the total radiating surface radiating capacity is 42W, and the total radiating surface area is 0.96cm when the outlet water temperature is 1 ℃ higher than the inlet water temperature 2 The specific heat dissipation power is 44W/cm 2 。
Compared with the scheme of welding high-heat-conductivity materials or processing array jet flow or micro-channel, the method has the advantages of low processing difficulty, easy realization of engineering industrialization and contribution to further reduction of mass production cost of a high-energy laser system. In practical use, the invention can support 1000W,1.2ms,50Hz, diameter of 3.0mm, waste heat recorded by 8 percent and equivalent specific heat dissipation power of 41W/cm 2 Pump optical power density 520W/cm 2 Pumping light. The heat dissipation effect is more uniform, and the emergent light spot quality is higher. And the welding scheme is free from the problem of the process yield, and has high engineering cost performance.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention, which are within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (9)
1. A laser gain medium heat dissipation module, comprising:
the water inlet manifold comprises a mixing zone, a front nozzle and a diffusion zone which are sequentially connected, wherein the flow cross section of the diffusion zone is smaller than that of the mixing zone and larger than that of the front nozzle;
a cooling flow passage, wherein the upstream is connected with the diffusion region, and the flow cross section is smaller than that of the diffusion region;
the drainage manifold comprises a convergence zone, a rear nozzle and a release zone which are sequentially connected, the flow cross section of the convergence zone is smaller than that of the release zone and larger than that of the rear nozzle, the upstream of the convergence zone is connected with the downstream of the cooling flow channel, and the flow cross section of the convergence zone is larger than that of the cooling flow channel;
the laser gain medium is arranged on one side of the cooling flow channel, turbulent flow flows through the cooling surface of the laser gain medium, and the cooling surface of the laser gain medium is parallel to the turbulent flow direction.
2. The laser gain medium heat sink module of claim 1, wherein the cooling flow channel is a flat flow channel, and an orthographic projection of a cooling surface of the laser gain medium falls into the cooling flow channel.
3. The laser gain medium heat dissipation module according to claim 1, wherein the heat dissipation module comprises a body and a fixing member, the mixing region, the front nozzle, the rear nozzle and the release region are disposed in the body, the fixing member has a light passing hole, the laser gain medium is mounted in the light passing hole, and the fixing member is mounted on the body and forms the diffusion region, the cooling flow channel and the convergence region with the body.
4. A laser gain medium heat sink module as claimed in claim 3, wherein the body has an inner recess having regions corresponding to the diffusion region, cooling flow passage, convergence region respectively.
5. The laser gain medium heat sink module of claim 4, wherein the body has a runner gasket disposed in a region corresponding to the cooling runner.
6. The laser gain medium heat sink module of claim 4, wherein the outlet of the front nozzle is located in a region corresponding to the diffusion region, the inlet of the front nozzle extends to the mixing region, the inlet of the rear nozzle is located in a region corresponding to the convergence region, and the outlet of the rear nozzle extends to the release region.
7. The laser gain medium heat dissipation module according to claim 3, wherein the fixing member comprises a first fixing piece and a second fixing piece, the light passing hole comprises a front window and a rear window, the front window is located on the first fixing piece, the rear window is located on the second fixing piece, the size of the front window is smaller than that of the rear window, a flange is arranged at the bottom of the rear window, the laser gain medium is installed in the rear window and is borne on the flange, and the first fixing piece is fixed on the second fixing piece and compresses the laser gain medium.
8. The laser gain medium heat dissipating module of claim 7, wherein the flange has an annular groove on a side thereof opposite to the first fixing piece, and indium wires are embedded in the annular groove.
9. The module according to any one of claims 1 to 8, wherein the thickness of turbulence in the cooling channel section where the laser gain medium is located is not less than 0.1 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311714163.1A CN117673870A (en) | 2023-12-13 | 2023-12-13 | Laser gain medium heat radiation module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311714163.1A CN117673870A (en) | 2023-12-13 | 2023-12-13 | Laser gain medium heat radiation module |
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| CN117673870A true CN117673870A (en) | 2024-03-08 |
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| CN202311714163.1A Pending CN117673870A (en) | 2023-12-13 | 2023-12-13 | Laser gain medium heat radiation module |
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