Magnetofluid circulating cooling module and cooling method for all-solid-state laser

Abstract

The invention relates to the technical field of laser, and provides a magnetofluid circulation cooling module and method for an all-solid-state laser, the magnetofluid circulation cooling module comprises a circulation frame, a magnetofluid and a magnetic force source, the magnetofluid is arranged in the circulation frame, one side face of the circulation frame is provided with the magnetic force source, and the other side face is tightly attached to a laser crystal; the circulation frame is divided into an inflow area, a confluence area and an outflow area from left to right, so that the magnetic fluid forms a circulation loop; the magnetic force source comprises an inflow electromagnet, a confluence electromagnet and an outflow electromagnet, and formed magnetic lines have magnetic force gradients so as to achieve a circulation loop of the magnetic fluid. According to the invention, the magnetic fluid is adopted as the cooling fluid, and the flow path of the magnetic fluid is accurately controlled through the accurate magnetic force source, so that the distribution path of the magnetic fluid is consistent with the internal temperature distribution of the laser crystal, and the optimization of the energy consumption of the device is ensured while the insufficient cooling of the center of the laser crystal is avoided.

Description

Technical Field

[0001] The invention relates to the field of laser technology, in particular to a magnetic fluid circulation cooling module and a cooling method for an all-solid-state laser. Background Art

[0002] Thermal management of laser crystals is critical in the operation of high-power all-solid-state lasers. All-solid-state lasers use solid-state laser crystals as gain media, which generate a lot of heat when irradiated with pump light. Failure to effectively manage this heat will not only lead to unstable output power of the laser, but may also cause a series of heat-related problems such as thermal lensing, thermal stress, and damage to the laser crystal. These problems will seriously affect the laser's beam quality, optical efficiency, and the overall reliability and service life of the system.

[0003] Traditional cooling methods mainly include air cooling and liquid cooling. Air cooling is usually only suitable for low-power lasers because its cooling efficiency is low and is not enough to cope with the large amount of heat required by high-power lasers. Liquid cooling, despite its high cooling efficiency, usually relies on water cooling or other coolant circulation systems. These systems are large, noisy and complex to maintain. In addition, the coolant in the liquid cooling system may cause optical contamination or cause thermal stress concentration on the crystal surface when it contacts the surface of the laser crystal, which will have a negative impact on laser performance.

[0004] In order to overcome the shortcomings of traditional cooling methods, magnetic fluid cooling technology has been proposed as an innovative solution. Magnetic fluid is a liquid with suspended magnetic nanoparticles, which has good thermal conductivity and magnetic responsiveness. Under the action of a magnetic field, the magnetic fluid can achieve directional flow, thus forming an efficient circulating cooling loop. This technology can achieve local cooling in the high-heat area of ​​the laser by precisely controlling the distribution and intensity of the magnetic field, thereby significantly improving the heat dissipation efficiency and reducing the temperature gradient of the laser crystal.

[0005] There are many advantages of the cooling method based on magnetic fluid. First, it has high cooling efficiency and low noise, which makes it very suitable for the application of high-power lasers. Secondly, the structure of the magnetic fluid cooling system is compact and suitable for space-constrained environments. Furthermore, by dynamically adjusting the magnetic field, the intelligent control of the cooling system can be realized to adapt to the cooling needs of the laser under different working conditions, thereby further improving the overall performance of the system. However, magnetic fluid cooling technology also faces some challenges. The first is how to optimize the magnetic field design to improve the cooling efficiency. It is necessary to determine the best design scheme through precise magnetic field simulation and experiments. Secondly, how to ensure the long-term stability of the magnetic fluid is a key issue, and its durability and stability in long-term use must be studied. Finally, reducing the complexity and manufacturing cost of the system is also an important research direction in order to make this technology more economical and practical in practical applications.

[0006] In summary, the development of an efficient, reliable and easy-to-maintain magnetic fluid circulation cooling module and its cooling method can not only improve the performance of high-power all-solid-state lasers, but also have important practical application value and broad market prospects. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a magnetic fluid circulation cooling module and a cooling method for an all-solid-state laser, which solves the problems raised in the above-mentioned background technology.

[0009] (II) Technical solution

[0010] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0011] like Figure 1 As shown, during the operation of the all-solid-state laser, when the laser crystal is irradiated by pump light, a temperature distribution pattern will be formed inside the laser crystal with the highest temperature in the middle and the surrounding temperature gradually decreasing. For this type of temperature distribution pattern, when the traditional uniform heat dissipation method is used, on the one hand, it will lead to insufficient cooling of the center temperature of the laser crystal; if the cooling intensity is increased, on the other hand, it will lead to an increase in the overall energy consumption of the device. In response to the above technical problems, the present invention proposes a cooling method that fits the temperature distribution of the laser crystal. By controlling the distribution of the cooling fluid to be consistent with the temperature distribution inside the laser crystal, the center cooling intensity is achieved to be greater than the edge cooling intensity, thereby avoiding insufficient cooling of the center of the laser crystal while ensuring the optimization of the energy consumption of the device.

[0012] Traditional cooling fluids generally use pure water, which can achieve heat dissipation for laser crystals, but its flow can only be controlled by pressure, and it cannot achieve flow in a specific path according to the temperature distribution inside the laser crystal. Magnetic fluid is a liquid with suspended magnetic nanoparticles, which has good thermal conductivity and magnetic responsiveness. Under the action of a magnetic field, magnetic fluid can achieve directional flow, thus forming an efficient circulating cooling loop. This technology can achieve local cooling in the high-heat area of ​​the laser by precisely controlling the distribution and intensity of the magnetic field, thereby significantly improving the heat dissipation efficiency and reducing the temperature gradient of the laser crystal.

[0013] Refer to the following Figures 2 to 6 A magnetic fluid circulation cooling module and cooling method for an all-solid-state laser provided in an embodiment of the present invention are described.

[0014] The present invention proposes a magnetic fluid circulation cooling module for an all-solid-state laser, comprising a circulation frame, a magnetic fluid and a magnetic source. The circulation frame is a sealed flat cubic structure, the magnetic fluid is arranged in the circulation frame, the magnetic source is arranged on one side of the circulation frame, and the other side is close to the laser crystal.

[0015] The material of the circulation frame is a metal with high thermal conductivity. Preferably, the material of the circulation frame is copper.

[0016] like Figure 2 As shown, the circulation frame is divided into an inflow area 1, a confluence area 2 and an outflow area 3 from left to right, and the left edge of the circulation frame is aligned with the left edge of the laser crystal, wherein the pump light enters the laser crystal from left to right.

[0017] The inflow area 1 includes a plurality of strip-shaped ribs arranged parallel to each other to form a plurality of inflow channels for the magnetic fluid to flow.

[0018] Preferably, the strip-shaped ribs include a first strip-shaped rib 7-1, a second strip-shaped rib 7-2, a third strip-shaped rib 7-3, a fourth strip-shaped rib 7-4, a fifth strip-shaped rib 7-5, and a sixth strip-shaped rib 7-6, and the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6 have a rightward bending extension portion, and the confluence area 2 is formed by the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6.

[0019] The bending directions of the bending extensions of the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6 are opposite to each other, so that the area of ​​the confluence region 2 is gradually narrowed, and an outflow port for the magnetic fluid to flow out is formed through the relatively arranged bending extensions.

[0020] Preferably, the strip ribs are made of red copper.

[0021] Preferably, the inflow channel includes a first inflow channel 1-1, a second inflow channel 1-2, a third inflow channel 1-3, a fourth inflow channel 1-4, and a fifth inflow channel 1-5; the first inflow channel 1-1 is formed by the first strip-shaped rib 7-1 and the second strip-shaped rib 7-2; the second inflow channel 1-2 is formed by the second strip-shaped rib 7-2 and the third strip-shaped rib 7-3; the third inflow channel 1-3 is formed by the third strip-shaped rib 7-3 and the fourth strip-shaped rib 7-4; the fourth inflow channel 1-4 is formed by the fourth strip-shaped rib 7-4 and the fifth strip-shaped rib 7-5; the fifth inflow channel 1-5 is formed by the fifth strip-shaped rib 7-5 and the sixth strip-shaped rib 7-6.

[0022] like Figure 3 The figure shows a schematic diagram of the magnetic fluid flow path of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the inflow channel of the inflow area 1 is connected with the confluence area 2 via a converging path so that the magnetic fluid converges at the confluence area 2.

[0023] Preferably, the first inflow channel 1 - 1 , the second inflow channel 1 - 2 , the third inflow channel 1 - 3 , the fourth inflow channel 1 - 4 and the fifth inflow channel 1 - 5 are connected to the confluence area 2 so that the magnetic fluid converges at the confluence area 2 .

[0024] The confluence area 2 is communicated with the outflow area 3 so that the magnetic fluid flows toward the outflow area 3 .

[0025] The outflow region 3 includes a plurality of outflow channels through which the magnetic fluid can flow. Preferably, the outflow channels include a first outflow channel 3-1 and a second outflow channel 3-2.

[0026] The outflow channel of the outflow area 3 is connected to the inflow area 1 so that the magnetic fluid returns to the inflow area 1 to form a circulation loop.

[0027] Preferably, the first outflow channel 3 - 1 and the second outflow channel 3 - 2 are connected to the inflow area 1 so that the magnetic fluid returns to the inflow area 1 to form a circulation loop.

[0028] like Figure 4 The figure shows a schematic diagram of a magnetic source of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the magnetic source comprises an inflow electromagnet 4 , a confluence electromagnet 5 and an outflow electromagnet 6 .

[0029] The inflow electromagnet 4 is arranged above the level of the inflow region 1 , the merging electromagnet 5 is arranged above the level of the merging region 2 , and the outflow electromagnet 6 is arranged above the level of the outflow region 3 .

[0030] Preferably, the N pole of the inflow electromagnet 4 points to the confluence electromagnet 5 along the direction of the magnetic force lines, the N pole of the confluence electromagnet 5 points to the outflow electromagnet 6 along the direction of the magnetic force lines, and the N pole of the outflow electromagnet 6 points to the inflow electromagnet 4 along the direction of the magnetic force lines.

[0031] Preferably, the S pole of the inflow electromagnet 4 points to the confluence electromagnet 5 along the direction of the magnetic force lines, the S pole of the confluence electromagnet 5 points to the outflow electromagnet 6 along the direction of the magnetic force lines, and the S pole of the outflow electromagnet 6 points to the inflow electromagnet 4 along the direction of the magnetic force lines.

[0032] Preferably, the inflow electromagnet 4 includes a first inflow electromagnet 4-1, a second inflow electromagnet 4-2, a third inflow electromagnet 4-3, a fourth inflow electromagnet 4-4, and a fifth inflow electromagnet 4-5; the first inflow electromagnet 4-1 is arranged above the level of the first inflow channel 1-1, the second inflow electromagnet 4-2 is arranged above the level of the second inflow channel 1-2, the third inflow electromagnet 4-3 is arranged above the level of the third inflow channel 1-3, the fourth inflow electromagnet 4-4 is arranged above the level of the fourth inflow channel 1-4, and the fifth inflow electromagnet 4-5 is arranged above the level of the fifth inflow channel 1-5.

[0033] Preferably, the outflow electromagnet 6 includes a first outflow electromagnet 6-1, a second outflow electromagnet 6-2, a third outflow electromagnet 6-3, and a fourth outflow electromagnet 6-4; the first outflow electromagnet 6-1 and the second outflow electromagnet 6-2 are arranged in sequence above the level of the first flow channel 3-1 along the flow direction of the magnetic fluid; the third outflow electromagnet 6-3 and the fourth outflow electromagnet 6-4 are arranged in sequence above the level of the second flow channel 3-2 along the flow direction of the magnetic fluid.

[0034] like Figure 5 (a) shows a left side view of a magnetic fluid circulation cooling module for all-solid-state lasers. Figure 5 (b) shows a right side view of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the first inflow electromagnet 4-1, the second inflow electromagnet 4-2, the third inflow electromagnet 4-3, the fourth inflow electromagnet 4-4, the fifth inflow electromagnet 4-5, the confluence electromagnet 5, the first outflow electromagnet 6-1, the second outflow electromagnet 6-2, the third outflow electromagnet 6-3, and the fourth outflow electromagnet 6-4 are arranged on one side of the circulation frame.

[0035] The magnetic forces of the inflow electromagnet 4 , the confluence electromagnet 5 and the outflow electromagnet 6 are adjustable, and the formed magnetic force lines have a magnetic force gradient to realize the circulation loop of the magnetic fluid.

[0036] In one embodiment, a cooling method using any one of the above-mentioned magnetic fluid circulation cooling modules for an all-solid-state laser is also provided, the method comprising:

[0037] A first current is passed through the inflow electromagnet 4 to turn on the inflow electromagnet 4; a second current is passed through the converging electromagnet 5 to turn on the converging electromagnet 5; a third current is passed through the outflow electromagnet 6 to turn on the outflow electromagnet 6;

[0038] The first current is smaller than the second current, and the second current is smaller than the third current, forming a magnetic force gradient that gradually increases from left to right horizontally, so that the magnetic fluid flows from the inflow area 1 through the confluence area 2 to the outflow area 3;

[0039] Preferably, the first current is 1A; the second current is 2A; the second current is 3A;

[0040] The third current passed through the outflow electromagnet 6 is reduced to form a magnetic force gradient that gradually increases from right to left, so that the magnetic fluid flows from the outflow area 3 to the inflow area 1 to form a circulation loop;

[0041] The circulation of the magnetic fluid can achieve heat dissipation for the laser crystal in close contact with the circulation frame.

[0042] In one embodiment, a cooling device using any of the above-mentioned magnetic fluid circulation cooling modules for an all-solid-state laser is also provided, the device comprising:

[0043] A plurality of magnetic fluid circulation cooling modules for all-solid-state lasers are closely attached to the surfaces of laser crystals to achieve precise heat dissipation for the laser crystals.

[0044] Preferably, Figure 6 Shown is a schematic diagram of a magnetofluid circulation cooling device for an all-solid-state laser, including a magnetofluid circulation cooling module for the all-solid-state laser and a cubic laser crystal. The number of the magnetofluid circulation cooling modules for the all-solid-state laser is selected to be four, which are respectively attached to the four side surfaces of the cubic laser crystal except the two light-transmitting surfaces, so as to achieve precise heat dissipation for the laser crystal.

[0045] Preferably, for cylindrical laser crystals, the number of the magnetofluid circulation cooling modules for all-solid-state lasers is selected to be two, and the circulation frame is processed into a semicircular structure. Through the connection method of two semicircular snap-fits, the two magnetofluid circulation cooling modules for all-solid-state lasers are tightly attached to the sides of the cylindrical laser crystal, thereby achieving precise heat dissipation for the laser crystal.

[0046] (III) Beneficial effects

[0047] Compared with the prior art, the present invention provides a magnetic fluid circulation cooling module and cooling method for all-solid-state lasers, which have the following beneficial effects:

[0048] The purpose of the present invention is to solve the technical problem of excessive energy consumption caused by uneven thermal stress during the heat dissipation of traditional all-solid-state lasers. It specifically proposes to use magnetic fluid as a cooling fluid, and to achieve precise control of the magnetic fluid flow path through a precise magnetic source, so that the magnetic fluid distribution path is consistent with the internal temperature distribution of the laser crystal, and the center cooling intensity is greater than the edge cooling intensity, thereby avoiding insufficient cooling of the center of the laser crystal while ensuring the optimization of the device energy consumption, and realizing an efficient, reliable and easy-to-maintain magnetic fluid circulation cooling module and its cooling method, which can not only improve the performance of high-power all-solid-state lasers, but also have important practical application value and broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Schematic diagram of the temperature distribution inside the laser crystal in an all-solid-state laser;

[0050] Figure 2 A schematic diagram of a circulation framework of a magnetic fluid circulation cooling module for all-solid-state lasers;

[0051] Figure 3 A schematic diagram of a magnetic fluid flow path of a magnetic fluid circulation cooling module for an all-solid-state laser;

[0052] Figure 4 A schematic diagram of a magnetic source of a magnetic fluid circulation cooling module for an all-solid-state laser;

[0053] Figure 5 (a) is a left side view of a magnetic fluid circulation cooling module for all-solid-state lasers;

[0054] Figure 5 (b) is a right side view of a magnetic fluid circulation cooling module for all-solid-state lasers;

[0055] Figure 6 Schematic diagram of a magnetic fluid circulation cooling device for all-solid-state lasers.

[0056] In the figure: 1, inflow area; 2, confluence area; 3, outflow area; 1-1, first inflow channel; 1-2, second inflow channel; 1-3, third inflow channel; 1-4, fourth inflow channel; 1-5, fifth inflow channel; 3-1, first outflow channel; 3-2, second outflow channel; 4, inflow electromagnet; 4-1, first inflow electromagnet; 4-2, second inflow electromagnet; 4-3, third inflow electromagnet; 4-4, fourth inflow electromagnet; 4-5, fifth inflow electromagnet; 5, confluence electromagnet; 6, outflow electromagnet; 6-1, first outflow electromagnet; 6-2, second outflow electromagnet; 6-3, third outflow electromagnet; 6-4, fourth outflow electromagnet. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example

[0059] like Figure 1-6 As shown, a magnetic fluid circulation cooling module and cooling method for an all-solid-state laser proposed in one embodiment of the present invention,

[0060] Refer to the following Figures 2 to 5 A magnetic fluid circulation cooling module for an all-solid-state laser provided in an embodiment of the present invention is described.

[0061] The present invention proposes a magnetic fluid circulation cooling module for an all-solid-state laser, comprising a circulation frame, a magnetic fluid and a magnetic source. The circulation frame is a sealed flat cubic structure, the magnetic fluid is arranged in the circulation frame, the magnetic source is arranged on one side of the circulation frame, and the other side is close to the laser crystal.

[0062] The material of the circulation frame is a metal with high thermal conductivity. Preferably, the material of the circulation frame is copper.

[0063] like Figure 2 As shown, the circulation frame is divided into an inflow area 1, a confluence area 2 and an outflow area 3 from left to right, and the left edge of the circulation frame is aligned with the left edge of the laser crystal, wherein the pump light enters the laser crystal from left to right.

[0064] The inflow area 1 includes a plurality of strip-shaped ribs arranged parallel to each other to form a plurality of inflow channels for the magnetic fluid to flow.

[0065] Preferably, the strip-shaped ribs include a first strip-shaped rib 7-1, a second strip-shaped rib 7-2, a third strip-shaped rib 7-3, a fourth strip-shaped rib 7-4, a fifth strip-shaped rib 7-5, and a sixth strip-shaped rib 7-6, and the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6 have a rightward bending extension portion, and the confluence area 2 is formed by the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6.

[0066] The bending directions of the bending extensions of the first strip-shaped rib 7-1 and the sixth strip-shaped rib 7-6 are opposite to each other, so that the area of ​​the confluence region 2 is gradually narrowed, and an outflow port for the magnetic fluid to flow out is formed through the relatively arranged bending extensions.

[0067] Preferably, the strip ribs are made of red copper.

[0068] Preferably, the inflow channel includes a first inflow channel 1-1, a second inflow channel 1-2, a third inflow channel 1-3, a fourth inflow channel 1-4, and a fifth inflow channel 1-5; the first inflow channel 1-1 is formed by the first strip-shaped rib 7-1 and the second strip-shaped rib 7-2; the second inflow channel 1-2 is formed by the second strip-shaped rib 7-2 and the third strip-shaped rib 7-3; the third inflow channel 1-3 is formed by the third strip-shaped rib 7-3 and the fourth strip-shaped rib 7-4; the fourth inflow channel 1-4 is formed by the fourth strip-shaped rib 7-4 and the fifth strip-shaped rib 7-5; the fifth inflow channel 1-5 is formed by the fifth strip-shaped rib 7-5 and the sixth strip-shaped rib 7-6.

[0069] like Figure 3 The figure shows a schematic diagram of the magnetic fluid flow path of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the inflow channel of the inflow area 1 is connected with the confluence area 2 via a converging path so that the magnetic fluid converges at the confluence area 2.

[0070] Preferably, the first inflow channel 1 - 1 , the second inflow channel 1 - 2 , the third inflow channel 1 - 3 , the fourth inflow channel 1 - 4 and the fifth inflow channel 1 - 5 are connected to the confluence area 2 so that the magnetic fluid converges at the confluence area 2 .

[0071] The confluence area 2 is communicated with the outflow area 3 so that the magnetic fluid flows toward the outflow area 3 .

[0072] The outflow region 3 includes a plurality of outflow channels through which the magnetic fluid can flow. Preferably, the outflow channels include a first outflow channel 3-1 and a second outflow channel 3-2.

[0073] The outflow channel of the outflow area 3 is connected to the inflow area 1 so that the magnetic fluid returns to the inflow area 1 to form a circulation loop.

[0074] Preferably, the first outflow channel 3 - 1 and the second outflow channel 3 - 2 are connected to the inflow area 1 so that the magnetic fluid returns to the inflow area 1 to form a circulation loop.

[0075] like Figure 4 The figure shows a schematic diagram of a magnetic source of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the magnetic source comprises an inflow electromagnet 4 , a confluence electromagnet 5 and an outflow electromagnet 6 .

[0076] The inflow electromagnet 4 is arranged above the level of the inflow region 1 , the merging electromagnet 5 is arranged above the level of the merging region 2 , and the outflow electromagnet 6 is arranged above the level of the outflow region 3 .

[0077] Preferably, the N pole of the inflow electromagnet 4 points to the confluence electromagnet 5 along the direction of the magnetic force lines, the N pole of the confluence electromagnet 5 points to the outflow electromagnet 6 along the direction of the magnetic force lines, and the N pole of the outflow electromagnet 6 points to the inflow electromagnet 4 along the direction of the magnetic force lines.

[0078] Preferably, the S pole of the inflow electromagnet 4 points to the confluence electromagnet 5 along the direction of the magnetic force lines, the S pole of the confluence electromagnet 5 points to the outflow electromagnet 6 along the direction of the magnetic force lines, and the S pole of the outflow electromagnet 6 points to the inflow electromagnet 4 along the direction of the magnetic force lines.

[0079] Preferably, the inflow electromagnet 4 includes a first inflow electromagnet 4-1, a second inflow electromagnet 4-2, a third inflow electromagnet 4-3, a fourth inflow electromagnet 4-4, and a fifth inflow electromagnet 4-5; the first inflow electromagnet 4-1 is arranged above the level of the first inflow channel 1-1, the second inflow electromagnet 4-2 is arranged above the level of the second inflow channel 1-2, the third inflow electromagnet 4-3 is arranged above the level of the third inflow channel 1-3, the fourth inflow electromagnet 4-4 is arranged above the level of the fourth inflow channel 1-4, and the fifth inflow electromagnet 4-5 is arranged above the level of the fifth inflow channel 1-5.

[0080] Preferably, the outflow electromagnet 6 includes a first outflow electromagnet 6-1, a second outflow electromagnet 6-2, a third outflow electromagnet 6-3, and a fourth outflow electromagnet 6-4; the first outflow electromagnet 6-1 and the second outflow electromagnet 6-2 are arranged in sequence above the level of the first flow channel 3-1 along the flow direction of the magnetic fluid; the third outflow electromagnet 6-3 and the fourth outflow electromagnet 6-4 are arranged in sequence above the level of the second flow channel 3-2 along the flow direction of the magnetic fluid.

[0081] like Figure 5 (a) shows a left side view of a magnetic fluid circulation cooling module for all-solid-state lasers. Figure 5 (b) shows a right side view of a magnetic fluid circulation cooling module for an all-solid-state laser, wherein the first inflow electromagnet 4-1, the second inflow electromagnet 4-2, the third inflow electromagnet 4-3, the fourth inflow electromagnet 4-4, the fifth inflow electromagnet 4-5, the confluence electromagnet 5, the first outflow electromagnet 6-1, the second outflow electromagnet 6-2, the third outflow electromagnet 6-3, and the fourth outflow electromagnet 6-4 are arranged on one side of the circulation frame.

[0082] The magnetic forces of the inflow electromagnet 4 , the confluence electromagnet 5 and the outflow electromagnet 6 are adjustable, and the formed magnetic force lines have a magnetic force gradient to realize the circulation loop of the magnetic fluid.

[0083] In one embodiment, a cooling method using any one of the above-mentioned magnetic fluid circulation cooling modules for an all-solid-state laser is also provided, the method comprising:

[0084] A first current is passed through the inflow electromagnet 4 to turn on the inflow electromagnet 4; a second current is passed through the converging electromagnet 5 to turn on the converging electromagnet 5; a third current is passed through the outflow electromagnet 6 to turn on the outflow electromagnet 6;

[0085] The first current is smaller than the second current, and the second current is smaller than the third current, forming a magnetic force gradient that gradually increases from left to right horizontally, so that the magnetic fluid flows from the inflow area 1 through the confluence area 2 to the outflow area 3;

[0086] Preferably, the first current is 1A; the second current is 2A; the second current is 3A;

[0087] The third current passed through the outflow electromagnet 6 is reduced to form a magnetic force gradient that gradually increases from right to left, so that the magnetic fluid flows from the outflow area 3 to the inflow area 1 to form a circulation loop;

[0088] The circulation loop of the magnetic fluid is used to dissipate heat for the laser crystal that is in close contact with the circulation frame.

[0089] In one embodiment, a cooling device using any of the above-mentioned magnetic fluid circulation cooling modules for an all-solid-state laser is also provided, the device comprising:

[0090] A plurality of magnetic fluid circulation cooling modules for all-solid-state lasers are closely attached to the surfaces of laser crystals to achieve precise heat dissipation for the laser crystals.

[0091] Preferably, Figure 6 The figure shows a schematic diagram of a magnetic fluid circulation cooling device for an all-solid-state laser, including the magnetic fluid circulation cooling module for the all-solid-state laser and a cubic laser crystal. The number of the magnetic fluid circulation cooling modules for the all-solid-state laser is selected to be four, which are respectively closely attached to the four side surfaces of the cubic laser crystal except the two light-transmitting surfaces, so as to realize accurate heat dissipation for the laser crystal.

[0092] Preferably, for cylindrical laser crystals, the number of the magnetofluid circulation cooling modules for all-solid-state lasers is selected to be two, and the circulation frame is processed into a semicircular structure. Through the connection method of two semicircular snap-fits, the two magnetofluid circulation cooling modules for all-solid-state lasers are tightly attached to the sides of the cylindrical laser crystal, thereby achieving precise heat dissipation for the laser crystal.

[0093] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic fluid circulation cooling module for all-solid-state lasers, characterized in that: It includes a circulation frame, a magnetic fluid and a magnetic source, wherein the circulation frame is a sealed flat cubic structure, the magnetic fluid is arranged in the circulation frame, the magnetic source is arranged on one side of the circulation frame, and the other side is close to the laser crystal; The material of the circulation frame is a metal with high thermal conductivity; The circulation frame is divided into an inflow area, a confluence area and an outflow area from left to right, and the left edge of the circulation frame is aligned with the left edge of the laser crystal, wherein the pump light enters the laser crystal from left to right; The inflow area includes a plurality of strip-shaped ribs arranged in parallel to each other to form a plurality of inflow channels for the magnetic fluid to flow; the inflow channel of the inflow area is connected with the confluence area by a converging path so that the magnetic fluid converges at the confluence area; the confluence area is connected with the outflow area so that the magnetic fluid flows to the outflow area; the outflow area includes a plurality of outflow channels for the magnetic fluid to flow; the outflow channel of the outflow area is connected with the inflow area so that the magnetic fluid returns to the inflow area to form a circulation loop; The magnetic force source includes an inflow electromagnet, a confluence electromagnet and an outflow electromagnet; The inflow electromagnet is arranged above the level of the inflow area, the confluence electromagnet is arranged above the level of the confluence area, and the outflow electromagnet is arranged above the level of the outflow area; The magnetic forces of the inflow electromagnet, the confluence electromagnet and the outflow electromagnet are adjustable, and the formed magnetic force lines have a magnetic force gradient to realize the circulation loop of the magnetic fluid.

2. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 1, characterized in that: The circulation frame and the strip ribs are made of red copper.

3. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 1, characterized in that: The strip-shaped ribs include a first strip-shaped rib, a second strip-shaped rib, a third strip-shaped rib, a fourth strip-shaped rib, a fifth strip-shaped rib, and a sixth strip-shaped rib. The first strip-shaped rib and the sixth strip-shaped rib have a rightward bending extension portion, and the confluence area is formed by the first strip-shaped rib and the sixth strip-shaped rib. The bending directions of the bending extension portions of the first strip-shaped rib and the sixth strip-shaped rib are opposite to each other, so that the area of ​​the confluence area is gradually narrowed, and an outflow port for the magnetic fluid to flow out is formed by the relatively arranged bending extension portions.

4. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 3, characterized in that: The inflow channel includes a first inflow channel, a second inflow channel, a third inflow channel, a fourth inflow channel, and a fifth inflow channel; the first inflow channel is formed by the first strip-shaped rib and the second strip-shaped rib; the second inflow channel is formed by the second strip-shaped rib and the third strip-shaped rib; the third inflow channel is formed by the third strip-shaped rib and the fourth strip-shaped rib; the fourth inflow channel is formed by the fourth strip-shaped rib and the fifth strip-shaped rib; the fifth inflow channel is formed by the fifth strip-shaped rib and the sixth strip-shaped rib; the first inflow channel, the second inflow channel, the third inflow channel, the fourth inflow channel, and the fifth inflow channel are connected to the confluence area so that the magnetic fluid is gathered at the confluence area; The outflow channel includes a first outflow channel and a second outflow channel; the first outflow channel and the second outflow channel are connected to the inflow area so that the magnetic fluid returns to the inflow area to form a circulation loop.

5. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 1, characterized in that: The N pole of the inflow electromagnet points to the confluence electromagnet along the direction of magnetic force lines, the N pole of the confluence electromagnet points to the outflow electromagnet along the direction of magnetic force lines, and the N pole of the outflow electromagnet points to the inflow electromagnet along the direction of magnetic force lines.

6. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 1, characterized in that: The S pole of the inflow electromagnet points to the confluence electromagnet along the direction of magnetic force lines, the S pole of the confluence electromagnet points to the outflow electromagnet along the direction of magnetic force lines, and the S pole of the outflow electromagnet points to the inflow electromagnet along the direction of magnetic force lines.

7. The magnetic fluid circulation cooling module for all-solid-state laser according to claim 1, characterized in that: The inflow electromagnet includes a first inflow electromagnet, a second inflow electromagnet, a third inflow electromagnet, a fourth inflow electromagnet, and a fifth inflow electromagnet; the first inflow electromagnet is arranged above the level of the first inflow channel, the second inflow electromagnet is arranged above the level of the second inflow channel, the third inflow electromagnet is arranged above the level of the third inflow channel, the fourth inflow electromagnet is arranged above the level of the fourth inflow channel, and the fifth inflow electromagnet is arranged above the level of the fifth inflow channel; The outflow electromagnet includes a first outflow electromagnet, a second outflow electromagnet, a third outflow electromagnet, and a fourth outflow electromagnet; the first outflow electromagnet and the second outflow electromagnet are sequentially arranged above the level of the first flow channel along the flow direction of the magnetic fluid; the third outflow electromagnet and the fourth outflow electromagnet are sequentially arranged above the level of the second flow channel along the flow direction of the magnetic fluid.

8. A magnetic fluid circulation cooling method for an all-solid-state laser, using the magnetic fluid circulation cooling module for an all-solid-state laser as claimed in any one of claims 1 to 7, comprising: Passing a first current into the inflow electromagnet to turn on the inflow electromagnet; Passing a second current into the merging electromagnet to turn on the merging electromagnet; Passing a third current into the outflow electromagnet to turn on the outflow electromagnet; The first current is smaller than the second current, and the second current is smaller than the third current, forming a magnetic force gradient that gradually increases from left to right horizontally, so that the magnetic fluid flows from the inflow area through the confluence area to the outflow area; Reducing the third current passed through the outflow electromagnet to form a magnetic force gradient that gradually increases from right to left, so that the magnetic fluid flows from the outflow area to the inflow area to form a circulation loop; The heat dissipation of the laser crystal in close contact with the circulation frame is achieved through the circulation loop of the magnetic fluid.

9. A magnetic fluid circulation cooling device for an all-solid-state laser, using the magnetic fluid circulation cooling module for an all-solid-state laser as claimed in any one of claims 1 to 7, comprising: A plurality of the magnetic fluid circulation cooling modules for all-solid-state lasers are arranged in close contact with the surfaces of the laser crystal, and the magnetic fluid circulation cooling method for all-solid-state lasers as claimed in claim 8 is adopted to achieve precise heat dissipation for the laser crystal.

10. The magnetic fluid circulation cooling device for all-solid-state laser according to claim 9, characterized in that: The laser crystal is in a cubic shape, and the number of the magnetic fluid circulation cooling modules for the all-solid-state laser is selected to be four, which are respectively closely attached to the four sides of the laser crystal except the two light-transmitting surfaces, so as to achieve precise heat dissipation for the laser crystal; Alternatively, the laser crystal is cylindrical in shape, the number of the magnetic fluid circulation cooling modules for the all-solid-state laser is selected to be two, and the circulation frame is processed into a semicircular structure. Through the connection method of two semicircular snap-fits, the two magnetic fluid circulation cooling modules for the all-solid-state laser are closely attached to the sides of the laser crystal, thereby achieving precise heat dissipation for the laser crystal.

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