High-power 976nm single-mode all-fiber laser

Abstract

The invention belongs to the technical field of laser equipment, and particularly relates to a high-power 976nm single-mode all-fiber laser. According to the technology, an end cover is arranged at the left end of the shell, a pumping source is arranged in the shell, a water cooling plate is fixed in the shell, a mounting groove is formed in the water cooling plate, the bottom of the pumping source can be placed in the mounting groove, the mounting groove is obliquely formed, holes communicated with the mounting groove are formed in the groove wall of the mounting groove, and a water cooling assembly is arranged in the water cooling plate. An air cooling mechanism is installed on one side of the water cooling plate, an optical fiber power beam combiner is installed in the shell, and an output port is formed in the shell. The bottom of the pumping source is placed in the inclined mounting groove, the contact area of the pumping source and the water cooling plate is increased, the cooling effect is good, the holes communicated with the mounting groove are formed in the groove wall of the mounting groove, redundant silicone grease can flow into other mounting grooves when the silicone grease is smeared, the situation that much time is consumed for treatment when the silicone grease is smeared too much is avoided, and the service life of the pumping source is prolonged. And meanwhile, the heat conductivity is improved through the through holes and the silicone grease in the through holes, so that the heat dissipation effect is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of laser equipment, and in particular relates to a high-power 976nm single-mode all-fiber laser. Background Art

[0002] The high-power 976nm single-mode all-fiber laser is a single-mode all-fiber laser system based on a 976nm wavelength. Its main features include high output power, high stability, and good beam quality. This laser is mainly used in the field of material processing, including laser cutting, laser welding, laser cladding, and laser brazing. In addition, this laser is also widely used in the processing of high-reflection materials, such as aluminum alloy welding, and has extremely strong anti-high-reflection capabilities. Its high power and excellent beam quality enable it to perform well in industrial applications, meeting the strict requirements of industrial users for reliability and stability.

[0003] The laser mainly includes gain medium, pump source, resonant cavity, cooling system, control system and output system. When installing the cooling system, silicone grease is applied to the cooling plate for cooling the pump source to increase thermal conductivity and enhance the heat dissipation effect. There are also requirements for the amount of silicone grease applied. Too much silicone grease will affect other components, and too little will affect the heat dissipation effect of the pump source. Therefore, the application of silicone grease on the cooling plate of the existing laser requires experienced staff to grasp the amount. Summary of the invention

[0004] The purpose of the present invention is to provide a high-power 976nm single-mode all-fiber laser, which is convenient for applying silicone grease and can enhance the thermal conductivity of a water-cooled plate.

[0005] The high-power 976nm single-mode all-fiber laser comprises a horizontally arranged shell, an end cover is arranged at the left end of the shell, a plurality of pump sources distributed in a matrix are independently arranged in the shell, a water cooling plate for installing the pump sources is horizontally fixed in the shell, the pump sources are all arranged obliquely with the left side higher and the right side lower, corresponding to the pump sources, an obliquely arranged mounting groove is provided on the water cooling plate, and the groove wall of the mounting groove is provided with a plurality of holes for connecting the mounting grooves, and a water cooling component for cooling is provided inside the water cooling plate; An air cooling mechanism is installed on one side of the water cooling plate, an optical fiber power combiner is installed in the shell below the water cooling plate, and an output port for laser output is provided on the shell.

[0006] The pump source is used to provide energy to excite the gain medium to generate laser. The fiber power combiner is used to combine the generated laser into a more powerful laser beam. The bottom of the pump source is placed in the inclined mounting groove through the inclined mounting groove, and the right side wall is also partially located in the mounting groove, which increases the contact area between the pump source and the water-cooled plate, and has a good cooling effect. Through the hole connected to the mounting groove on the wall of the mounting groove, when applying silicone grease to the groove wall of one of the mounting grooves, excess silicone grease can flow into other mounting grooves to prevent time-consuming processing when too much grease is applied. At the same time, the through hole and the silicone grease in the through hole increase thermal conductivity, thereby enhancing the heat dissipation effect. The water cooling component in the water-cooled plate further increases the heat dissipation effect. The air cooling mechanism can not only increase internal heat dissipation, but also prevent condensation in the shell.

[0007] Furthermore, the water cooling assembly includes a cooling water pipe, and the cooling water pipe is arranged in a serpentine structure in the water cooling plate.

[0008] The serpentine distribution of cooling water pipes has a good cooling effect.

[0009] Furthermore, the water-cooled plate is two plates distributed up and down, which are the first cooling plate and the second cooling plate from top to bottom; The first refrigeration plate includes a first water-cooling plate, and the mounting groove includes a first mounting groove opened on the first water-cooling plate; The second refrigeration plate includes a second water-cooling plate detachably connected to the first water-cooling plate, a first water pipe groove for installing a refrigeration water pipe is provided on the top of the second water-cooling plate, a second water pipe groove is provided at the bottom of the first water-cooling plate corresponding to the first water pipe groove, and the first water pipe groove and the second water pipe groove together form a space for embracing the refrigeration water pipe.

[0010] The first water-cooling plate and the second water-cooling plate, which are detachably connected, together form a water-cooling plate, which is convenient for installing and maintaining the internal refrigeration water pipes.

[0011] Furthermore, the bottom of the first mounting groove is open, and a second mounting groove is provided on the second water cooling plate corresponding to the first mounting groove.

[0012] The first mounting groove and the second mounting groove together constitute an mounting groove for mounting the pump source. The mounting grooves are divided into the first mounting groove and the second mounting groove, so that the cooling water pipe between the first water-cooling plate and the second water-cooling plate is closer to the pump source, thereby enhancing the cooling effect on the pump source.

[0013] Furthermore, the air cooling mechanism is a cross-flow fan.

[0014] Cross-flow fans can both increase heat dissipation and prevent condensation inside the housing.

[0015] Furthermore, a heat sink is provided in the housing above the pump source.

[0016] The heat sink is used to further transfer heat and enhance the heat dissipation effect.

[0017] Furthermore, a circulating water pump is installed in the shell, and the circulating water pump is connected to water inlet and outlet copper blocks, and the water inlet and outlet copper blocks are provided with ports connected to the water inlet and outlet ends of the refrigeration water pipe.

[0018] The water inlet and outlet copper block has two water inlets and two water outlets, which respectively include a first water inlet and a first water outlet connected thereto, a second water inlet and a second water outlet connected thereto, the first water inlet is connected to the water outlet of a circulating water pump, the first water outlet is connected to the water inlet end of a refrigerating water pipe, the second water inlet is connected to the water outlet end of a refrigerating water pipe, and the second water outlet is connected to a refrigerating device. A circulating water cooling system is formed for the liquid in the refrigerating water pipe and the external refrigerating device through the circulating water pump and the water inlet and outlet copper blocks, and the water inlet and outlet copper blocks facilitate the connection and matching of the refrigerating water pipe and the circulating water pump.

[0019] Furthermore, a bundle coil is connected to the bottom of the second water-cooling plate.

[0020] The beam coil is used to enhance the laser signal.

[0021] Furthermore, the hole located on the wall of the first installation groove is a horizontally arranged circular through hole.

[0022] The round through hole is easy to process and facilitates the flow of silicone grease.

[0023] Furthermore, the first refrigeration plate and the second refrigeration plate are made of copper.

[0024] Copper has good thermal conductivity.

[0025] Compared with the prior art, the present invention has the following beneficial effects: Through the inclined mounting groove, the bottom of the pump source is placed in the inclined mounting groove, and the right side wall is also partially located in the mounting groove, which increases the contact area between the pump source and the water-cooled plate, and has a good cooling effect. Through the hole on the mounting groove wall that connects the mounting groove, when silicone grease is applied to the groove wall of one of the mounting grooves, excess silicone grease can flow into other mounting grooves, preventing time-consuming processing when too much grease is applied. At the same time, the through hole and the silicone grease in the through hole increase thermal conductivity, thereby enhancing the heat dissipation effect. Cooperating with the water-cooling component in the water-cooled plate, the heat dissipation effect is further increased. The air cooling mechanism can not only increase internal heat dissipation, but also prevent condensation in the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of a high-power 976nm single-mode all-fiber laser; Figure 2 for Figure 1 Left view of; Figure 3 for Figure 1 Top view after removing the housing and heat sink; Figure 4 yes Figure 1 A schematic diagram of the structure of the first refrigeration plate; Figure 5 yes Figure 1 A schematic diagram of the structure of the second refrigeration plate; Figure 6 yes Figure 4 Right view of; Figure 7 yes Figure 5 Right view of; Figure 8 yes Figure 4 A top view of Fig. 9 yes Figure 5 A top view of Fig.10 It is a partial cross-sectional view of a high-power 976nm single-mode all-fiber laser; Fig.11 It is a schematic diagram of the explosion of a high-power 976nm single-mode all-fiber laser.

[0027] The names of the components in the figure are: 1. Shell; 2. Heat sink; 3. Cross-flow fan; 4. First refrigeration plate; 4.1. First water-cooled plate; 4.2. Round through hole; 4.3. First mounting groove; 5. Refrigeration water pipe; 6. Second refrigeration plate; 6.1. Second water-cooled plate; 6.2. First water pipe groove; 6.3. Second mounting groove; 6.4. Bundle coil; 7. Fiber power combiner; 8. Pump source; 9. End cover; 10. Output port; 11. Circulating water pump; 12. Inlet and outlet copper blocks. DETAILED DESCRIPTION

[0028] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0029] Example This embodiment uses the following materials: Prepare a number of pump sources 8, the specific number of which is determined according to the parameters of the required laser, and six are used in this embodiment; Prepare aluminum profiles or copper plates and other materials with good thermal conductivity to make the heat sink 2, the first cooling plate 4 and the second cooling plate 6; Prepare a water pump as a circulating water pump 11; Prepare a water inlet and outlet copper block 12, which is an existing structure. The water inlet and outlet copper block 12 is a connector with two water inlets and two water outlets, including a first water inlet and a first water outlet connected thereto, and a second water inlet and a second water outlet connected thereto; Prepare a housing 1 and an end cover 9 covering the left end of the housing 1; Prepare a cross flow fan 3, preferably a 30 series or 60 series cross flow fan 3, the cross flow fan 3 is a known technology, and mainly includes a fan blade, a motor, a housing and a mounting bracket; Prepare several bundle coils 6.4 and optical fibers; Prepare a cooling water pipe 5, which is preferably made of a heat-conducting material such as copper, aluminum alloy or GH3625 high-temperature alloy.

[0030] The above materials are assembled as follows: Step 1: Processing Processing the first refrigeration plate 4 and the second refrigeration plate 6, such as Figures 4 to 9 As shown, the first cooling plate 4 is processed from a first water-cooling plate 4.1; the second cooling plate 6 is processed from a second water-cooling plate 6.1. The first water-cooling plate 4.1 and the second water-cooling plate 6.1 are rectangular parallelepiped structures. Figure 4 , Figure 6 and Figure 8 As shown, the second water cooling plate 6.1 is as Figure 5 , Figure 7 and Fig. 9 As shown; the first water-cooling plate 4.1 and the second water-cooling plate 6.1 are of the same size and can be aligned and overlapped.

[0031] After the first water-cooling plate 4.1 and the second water-cooling plate 6.1 are aligned and overlapped, as shown in the figure, an inclined first mounting groove 4.3 is processed on the first water-cooling plate 4.1, and a second mounting groove is processed on the second water-cooling plate 6.1. The bottom of the first mounting groove 4.3 is connected with the second mounting groove up and down, forming a whole, and together forming a mounting groove for mounting the pump source 8; like Figure 1 As shown, the installation groove formed by the first installation groove 4.3 and the second installation groove is a groove into which the pump source 8 can be placed after being tilted with the left side higher and the right side lower; like Figure 4 and Fig.11 As shown, a circular through hole 4.2 horizontally connected to other mounting grooves is processed on the groove wall of the first mounting groove 4.3. Whether a hole connecting each mounting groove is processed on the groove wall of the second mounting groove is determined by the depth of the second mounting groove. In this embodiment, the second mounting groove is shallow and no hole connecting each mounting groove is processed.

[0032] like Figure 7 and Fig. 9As shown, the bundle coil 6.4 is installed on the second water cooling plate 6.1, as shown in FIG. Figure 1 In the direction shown, the bundle coil 6.4 is located at the bottom of the second water-cooled plate 6.1.

[0033] The top of the second water cooling plate 6.1 is processed with a first water pipe groove 6.2, and the bottom of the first water cooling plate 4.1 is processed with a second water pipe groove corresponding to the first water pipe groove 6.2. The first water pipe groove 6.2 and the second water pipe groove form a space for embracing the cooling water pipe 5. Figure 1 As shown, the first water pipe groove 6.2 of the cooling water pipe 5 is located at the bottom of the first installation groove 4.3 and does not affect the installation of the pump source 8.

[0034] Processing heat sink 2, such as Fig.11 As shown, the heat sink 2 has an "n"-shaped cross section and has a plurality of heat dissipation holes on its wall.

[0035] Step 2: Installation The first refrigeration plate 4 and the second refrigeration plate 6 are placed horizontally. Figure 1 and Fig.11 As shown, the cooling water pipe 5 is installed in the first water pipe groove 6.2 and the second water pipe groove between the first cooling plate 4 and the second cooling plate 6, and the first cooling plate 4 and the second cooling plate 6 are fixed by bolts to prevent falling off; like Figure 3 As shown, the first water inlet of the water inlet and outlet copper block 12 is connected to the water outlet of the circulating water pump 11, the first water outlet of the water inlet and outlet copper block 12 is connected to the water inlet end of the refrigerating water pipe 5, the second water inlet of the water inlet and outlet copper block 12 is connected to the water outlet end of the refrigerating water pipe 5, and the second water outlet of the water inlet and outlet copper block 12 is connected to the circulating water cooling refrigeration equipment. Through the circulating water pump 11 and the water inlet and outlet copper block 12, a circulating water cooling system is formed for the liquid in the refrigerating water pipe 5 and the external refrigeration equipment. The water inlet and outlet copper block 12 facilitates the connection and matching of the refrigerating water pipe 5 and the circulating water pump 11; The optical fiber is connected to the pump source 8. The optical fiber in the bundle coil 6.4 enhances the laser signal and transmits it to the optical fiber power combiner 7. The optical fiber power combiner 7 is installed at the bottom of the second cooling plate 6. The optical fiber power combiner 7 enhances the laser beam power and outputs the laser through the output port 10.

[0036] like Figure 1 and Figure 3 As shown, the pump source 8 is installed in the installation groove. Before installation, silicone grease is applied in the installation groove, and then the pump source 8 is installed.

[0037] like Figure 3 As shown, the circulating water pump 11 is installed on the left side of the pump source 8, as shown in FIG. Figure 1 As shown, the heat sink 2 is installed above the pump source 8.

[0038] The above-mentioned components are installed as a whole in the housing 1, as shown in FIG. Figure 1 and Figure 3 As shown, the cross flow fan 3 is installed on the outer wall of the shell 1 on the right side of the first refrigeration plate 4. The structure after installation is as shown in FIG. Fig.10 shown.

[0039] like Figure 2 As shown, the output port 10 is arranged at a position slightly above the center of the end cover 9, as shown in FIG. Figure 1 and Figure 3 As shown, the end cover 9 is installed at the left end of the housing 1.

[0040] Instructions for use are as follows: When installing the pump source 8, silicone grease will be applied to the bottom of the pump source 8 and the inside of the installation groove. If too much silicone grease is applied, the excess silicone grease will flow into the next first installation groove 4.3 through the circular through hole 4.2 on the wall of the installation groove. When installing the next pump source 8, less silicone grease can be applied. The silicone grease flowing into the circular through hole 4.2 also has a heat conduction effect, which can better transfer or disperse the heat of the pump source 8, and then cooperate with the cooling water pipe 5 to dissipate heat, and the heat dissipation effect is good.

[0041] When in use, connect the water cooler to the circulating water pump 11 to achieve water cooling circulation. The laser is installed on a metal platform according to the production environment. It must be ensured that the platform is well grounded to prevent electromagnetic interference. After completing the above installation steps, necessary debugging and calibration are required to ensure that the laser can work normally. Regular maintenance and inspection are performed to extend the service life of the equipment.

[0042] A high-power 976nm single-mode all-fiber laser in this embodiment can effectively solve the problem of poor control of the amount of silicone grease applied, and through the circular through hole 4.2 and the silicone grease in the circular through hole 4.2, not only the thermal conductivity of the silicone grease is increased, but also the heat dissipation is increased. When working, turning on the cross-flow fan 3 can allow the ambient temperature difference inside the shell 1 and outside the shell 1 to be exchanged and replaced, achieving the effect of constant temperature inside and outside, and can effectively prevent condensation from occurring in the shell 1 due to excessive internal and external temperature differences, thereby burning the optical fiber and other components.

Claims

1. A high-power 976nm single-mode all-fiber laser, comprising a horizontally arranged housing (1), an end cover (9) being arranged at the left end of the housing (1), and a plurality of independently arranged pump sources (8) distributed in a matrix in the housing (1), characterized in that: A water cooling plate for mounting a pump source (8) is horizontally fixed in the shell (1), the pump sources (8) are all arranged in an inclined manner with the left side higher and the right side lower, and a corresponding installation groove for the pump source (8) is provided on the water cooling plate, and the bottom of the pump source (8) can be placed therein and is arranged in an inclined manner, and a plurality of holes for connecting the installation grooves are provided on the groove walls of the installation grooves, and a water cooling component for cooling is provided inside the water cooling plate; An air cooling mechanism is installed on one side of the water cooling plate, an optical fiber power combiner (7) is installed in a shell (1) below the water cooling plate, and an output port (10) for laser output is provided on the shell (1).

2. The high-power 976nm single-mode all-fiber laser according to claim 1, characterized in that: The water cooling component comprises a cooling water pipe (5), and the cooling water pipe (5) is arranged in a serpentine structure in the water cooling plate.

3. The high-power 976nm single-mode all-fiber laser according to claim 2, characterized in that: The water cooling plates are two plates distributed in an upper and lower manner, which are a first cooling plate (4) and a second cooling plate (6) from top to bottom; The first refrigeration plate (4) comprises a first water-cooling plate (4.1), and the mounting groove comprises a first mounting groove (4.3) opened on the first water-cooling plate (4.1); The second refrigeration plate (6) comprises a second water-cooling plate (6.1) detachably connected to the first water-cooling plate (4.1); a first water pipe groove (6.2) for installing a refrigeration water pipe (5) is provided at the top of the second water-cooling plate (6.1); a second water pipe groove is provided at the bottom of the first water-cooling plate (4.1) corresponding to the first water pipe groove (6.2); the first water pipe groove (6.2) and the second water pipe groove together form a space for embracing the refrigeration water pipe (5).

4. The high-power 976nm single-mode all-fiber laser according to claim 3, characterized in that: The bottom of the first mounting groove (4.3) is open, and a second mounting groove (6.3) is provided on the second water cooling plate (6.1) corresponding to the first mounting groove (4.3).

5. The high-power 976nm single-mode all-fiber laser according to claim 4, characterized in that: The air cooling mechanism is a cross-flow fan (3).

6. The high-power 976nm single-mode all-fiber laser according to claim 5, characterized in that: A heat sink (2) is provided in the housing (1) above the pump source (8).

7. The high-power 976nm single-mode all-fiber laser according to claim 6, characterized in that: A circulating water pump (11) is installed in the housing (1), and the circulating water pump (11) is connected to a water inlet and outlet copper block (12). The water inlet and outlet copper block (12) is provided with ports connected to the water inlet and outlet ends of the refrigeration water pipe (5).

8. The high-power 976nm single-mode all-fiber laser according to claim 7, characterized in that: The bottom of the second water-cooling plate (6.1) is connected to a bundle coil (6.4).

9. The high-power 976nm single-mode all-fiber laser according to claim 8, characterized in that: The hole located on the groove wall of the first installation groove (4.3) is a horizontally arranged circular through hole (4.2).

10. The high-power 976nm single-mode all-fiber laser according to claim 9, characterized in that: The first refrigeration plate (4) and the second refrigeration plate (6) are made of copper.

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