A compact and lightweight structure of a high-power fiber laser source

Abstract

The present invention discloses a compact and lightweight structure of a high-power fiber laser light source, including a driving power module, a laser optical path module, and a plurality of load-bearing columns; in the present application, waste heat generated when the laser light source is working is absorbed and temporarily stored by a phase change material, and when the laser light source is on standby, the temporarily stored waste heat is dissipated by an external coolant. Since the waste heat generated when the laser light source is working does not need to be taken away in real time, the requirements for the refrigerator are relatively low; since the direct heat dissipation of the external coolant is more efficient than the contact heat transfer; it has the advantages of being compact and lightweight: the present application reduces the tiled area of ​​the laser light source through a three-dimensional design of layered and stacked driving power modules and laser optical path modules, so that the three-dimensional space is used evenly, which is also conducive to compact layout and reduced volume; the present application makes full use of the tiled area required to be occupied by the laser optical path, splits the driving power supply into several short sub-power supply devices, reduces the size in the height direction, and optimizes the spatial layout.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber lasers, and in particular relates to a compact and lightweight structure of a high-power optical fiber laser light source. Background Art

[0002] Compared with gas or conventional solid-state lasers, high-power fiber lasers have the characteristics of excellent beam quality, high conversion efficiency, low threshold, and easy maintenance. They are widely used in industrial processing, printing, medical treatment, etc.

[0003] 1. Laser key technologies;

[0004] With the development of fiber lasers, their output power has increased significantly, resulting in the increasing size (weight, size, etc.) of lasers and the increasing waste heat generated by lasers. Therefore, thermal management design technology and compact and lightweight structure design technology of fiber lasers are key technologies that need to be solved.

[0005] 1.1 Thermal management design technology;

[0006] The thermal management of lasers mainly includes temperature control, waste heat storage, and waste heat dissipation.

[0007] Among the various key technologies of fiber lasers, solving the heat dissipation problem is an extremely critical technology for fiber lasers. Because although the electro-optical conversion efficiency of fiber lasers can be as high as 30%, that is, about 70% of the input electrical energy is converted into waste heat, this heat load will cause the beam quality and efficiency to decline and even cause damage to the laser. With the development of technology, the output power of the laser continues to increase, and the waste heat also increases significantly accordingly, making the heat dissipation of the device more difficult.

[0008] 1.2 Compact and lightweight structure design technology;

[0009] Due to the load-carrying and installation space limitations of platforms (such as small off-road vehicles with good maneuverability, speedboats, drones, etc.), and the fact that lasers are precise and complex optical systems and the environmental conditions are very harsh, the laser structure is required to be small in size, light in weight, stable and reliable, which makes the design more difficult.

[0010] 2. Definition of laser light source;

[0011] Lasers are generally composed of Figure 1 As shown. The laser light source is defined as a combination of laser light path (composed of laser devices), thermal management, and driving power supply. The laser light source is the core of the laser, and its volume and weight determine the scale of the entire laser.

[0012] 3. Existing technical solutions

[0013] Prior art solution 1:

[0014] Existing technical solutions are as follows Figure 2 As shown: the optical device 13 is arranged on the device mounting structure plate 16, and the device mounting structure plate 16 is as shown in FIG. Figure 3 As shown, the whole is placed in a laser light source box 15, and is equipped with a coolant interface 11 and an electrical connector 12 interface; the coolant interface 11 is externally connected to a refrigerator, and the waste heat generated when the laser light source is working is directly absorbed, taken away and discharged through the coolant; the electrical connector interface is externally connected to an independent drive power supply unit. Figure 2 Also shown is the laser light source and the platform mounting interface 14;

[0015] Existing technical solution 2:

[0016] Existing technical solution 2 is as follows Figure 4 As shown: the optical device 13 is arranged on the device installation structure plate 16, which is placed on a flat plate provided with a cooling liquid channel A18 and equipped with an electrical connector 12 interface; a plurality of square cavities 19 are provided inside the device installation structure plate 16, and the cavity 19 is filled with a phase change material. The waste heat generated when the laser light source is working is absorbed and temporarily stored by the phase change material. When the laser light source is on standby, the platform cold plate is connected to an external radiator to realize the dissipation of the temporarily stored waste heat; the electrical connector interface is connected to an independent drive power supply unit. As shown in Figure 4, an optical fiber runway 17 is also shown;

[0017] 1. Shortcomings of the prior art solution 1 and the causes thereof;

[0018] a. The thermal management method adopted in scheme 1 is to use coolant to remove the large amount of waste heat generated by the laser light source in real time. This requires the refrigerator to provide a considerable flow of coolant, resulting in a large scale of the refrigerator and high requirements for the pipeline. When the power of the laser light source is further increased, this problem becomes more obvious.

[0019] b. In order to make the temperature of the entire device mounting board uniform, it is necessary to open a continuous U-shaped coolant channel on the device mounting board, and the device mounting holes should avoid these positions, resulting in inflexible device layout;

[0020] c. The driving power supply is an independent stand-alone unit, which results in a large number of electrical connectors between the driving power supply and the laser optical path, and the cable between the two is too long.

[0021] 2. Shortcomings of the second existing technical solution and their causes;

[0022] a. The device mounting structure and the platform cold plate conduct heat through contact, causing the waste heat to be dissipated very slowly (up to several hours), and the laser light source working interval is too long;

[0023] b. A cold plate must be set between the device installation structure and the platform, which places high demands on the platform and some platforms must undergo special modifications;

[0024] c. The driving power supply is an independent stand-alone unit, which results in a large number of electrical connectors between the driving power supply and the laser optical path, and the cable between the two is too long.

[0025] Therefore, it is urgent to develop a high-power fiber laser light source with a compact and lightweight structure to solve the above problems. Summary of the invention

[0026] In order to solve the problems raised in the above background technology, the present invention provides a compact and lightweight structure of a high-power fiber laser light source.

[0027] To achieve the above object, the present invention provides the following technical solutions:

[0028] A high-power fiber laser light source with a compact and lightweight structure, comprising:

[0029] Driving power module;

[0030] Laser optical path module;

[0031] Multiple load-bearing columns; the driving power module and the laser optical path module are stacked in layers, and the driving power module and the laser optical path module are fixedly connected to form a frame structure through multiple load-bearing columns, and the electrical connector is placed on one side of the frame structure, and the electrical connector is used for inputting an external power supply and electrically connecting the driving power module with the laser optical path module.

[0032] Specifically, the laser optical path module includes:

[0033] Pump source optical device; the pump source optical device is installed in the middle of the pump source structural plate;

[0034] Main optical path optical device; the main optical path optical device is installed on the middle part of the main optical path structural plate, and the optical fiber runway and the main optical path optical device are arranged side by side;

[0035] Pump source structural plate;

[0036] Main optical path structure plate; after the pump source structure plate is connected to the main optical path structure plate, a cavity is formed inside, and the phase change material is encapsulated in the middle of the pump source structure plate and the main optical path structure plate;

[0037] Cooling liquid channel A; the cooling liquid channel A is placed in the cavity at the edge of the pump source structural plate; the cooling liquid channel A is arranged around the pump source optical device on the pump source structural plate, and the cooling liquid channel A is arranged around the optical fiber runway on the main optical path structural plate.

[0038] Preferably, a groove is provided on one side surface of the pump source structural plate, and the pump source optical device and the main optical path optical device are interconnected by optical fiber through the groove.

[0039] Preferably, a weight reduction cavity is provided on the pump source structure plate at a position where no phase change material and coolant channel are provided.

[0040] Specifically, the driving power module includes:

[0041] A driving power supply device; the driving power supply device includes a plurality of sub-power supply devices;

[0042] Driving power supply structure board;

[0043] Structural plate reinforcement ribs; multiple structural plate reinforcement ribs are installed on the driving power structural plate, and multiple sub-power devices are evenly distributed on the driving power structural plate and fixedly installed on the multiple structural plate reinforcement ribs;

[0044] Cooling liquid channel B: Cooling liquid channel B is placed in the cavity at the edge of the driving power structure plate and is arranged around the driving power device.

[0045] Specifically, one end of the load-bearing column is provided with an external thread, the other end of the load-bearing column is provided with an internal thread, the middle end of the load-bearing column is provided with a wrench slot, the three platform cold plates of the laser optical path module are provided with multiple fastening screws, and the three side ends of the driving power supply structure plate are provided with screw holes. The external thread of the load-bearing column is screwed into the screw hole, and the fastening screw is screwed into the internal thread of the load-bearing column.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. This application has the composite functions of phase change heat storage when the laser light source is working and liquid cooling heat dissipation during working intervals:

[0048] The waste heat generated when the laser light source is working is absorbed and temporarily stored by the phase change material. When the laser light source is on standby, the temporarily stored waste heat is dissipated by an external coolant. Since the waste heat generated when the laser light source is working does not need to be taken away in real time, the requirements for the refrigerator are lower, which solves the problem of the large scale of the refrigerator in the traditional technical solution. Since the direct heat dissipation of the external coolant is more efficient than the contact heat transfer, this also solves the problem of the long working interval of the laser light source in the traditional technical solution.

[0049] 2. Compact and lightweight:

[0050] a. The layered and stacked three-dimensional design of the driving power module and the laser optical path module reduces the paving area of ​​the laser light source, and the three-dimensional space is used evenly, which is also conducive to compact layout and reduced volume;

[0051] b. Make full use of the tiled area required by the laser optical path, split the driving power supply into several short sub-power supply devices, reduce the size in the height direction, and optimize the space layout;

[0052] c. The combined design of laser optical path module and driving power module greatly reduces the number of electrical connectors;

[0053] d. Arrange the laser optical path pump source optical device and the driving power supply face to face to facilitate direct connection of cables and shorten the length of the cable between the two;

[0054] e. The entire light source is formed into a frame structure through load-bearing columns. The structure is stable and easy to assemble and disassemble. While ensuring the overall structural rigidity and strength, the weight is light.

[0055] 3. Lower installation requirements

[0056] This application does not require the platform to provide a cold plate as installation support and heat conduction, and the installation conditions are lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is the schematic diagram of the laser;

[0058] Figure 2 It is a structural schematic diagram of the prior art solution 1;

[0059] Figure 3 A schematic diagram of a device installation structure plate in a first prior art solution;

[0060] Figure 4 It is a structural schematic diagram of the second prior art solution;

[0061] Figure 5 A schematic diagram of the three-dimensional structure of this application;

[0062] Figure 6 Schematic diagram of the structure of the laser optical path module in this application; a is a schematic diagram of the installation structure of the pump source optical device; b is a side view of the laser optical path module; c is a schematic diagram of the installation structure of the main optical path optical device; d is the AA cross-sectional view in b;

[0063] Figure 7 Schematic diagram of the structure of the driving power module in this application; a is a schematic diagram of the installation structure of the driving power device; b is a side view of the driving power module; c is a schematic diagram of the arrangement structure of the structural plate reinforcement ribs; d is the AA cross-sectional view in b;

[0064] Figure 8 It is a structural schematic diagram of the load-bearing column in this application;

[0065] Fig. 9 It is a schematic diagram of a plate-shaped load-bearing structure;

[0066] Fig.10 It is a schematic diagram of a column-shaped load-bearing structure;

[0067] In the figure: 11-cooling liquid interface, 12-electrical connector, 13-optical device, 14-laser light source and platform installation interface, 15-laser light source box, 16-device installation structure plate, 17-optical fiber runway, 18-cooling liquid channel A, 19-cavity, 21-driving power module, 211-driving power device, 212-driving power structure plate, 213-structural plate reinforcement rib, 22-laser optical path module, 221-pump source optical device, 222-pump source structure plate, 223-main optical path structure plate, 224-main optical path optical device, 225-groove, 226-weight reduction cavity, 227-cooling liquid channel B, 23-load-bearing column, 231-external thread, 232-wrench slot, 233-internal thread, 24-installation interface with platform, 25-fastening screw. DETAILED DESCRIPTION

[0068] 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.

[0069] The present invention provides the following technical solutions:

[0070] like Figure 5 As shown, a high-power fiber laser light source has a compact and lightweight structure, comprising:

[0071] Driving power supply module 21;

[0072] Laser optical path module 22;

[0073] A plurality of load-bearing columns 23; the driving power module 21 and the laser optical path module 22 are stacked in layers, and the driving power module 21 and the laser optical path module 22 are fixedly connected to form a frame structure through a plurality of load-bearing columns 23, and the electrical connector 12 is placed on one side of the frame structure, and the electrical connector 12 is used for inputting an external power supply and electrically connecting the driving power module 21 with the laser optical path module 22.

[0074] like Figure 6 As shown, the laser optical path module 22 includes:

[0075] Pump source optical device 221; The pump source optical device 221 is installed in the middle of the pump source structural plate 222;

[0076] The main optical path optical device 224 is installed on the middle part of the main optical path structural plate (223), and the optical fiber runway 17 and the main optical path optical device 224 are arranged side by side;

[0077] Pump source structural plate 222;

[0078] The main optical path structure plate 223; after the pump source structure plate 222 is connected to the main optical path structure plate 223, a cavity is formed inside, and the phase change material is encapsulated in the middle of the pump source structure plate 222 and the main optical path structure plate 223;

[0079] Cooling liquid channel A18; cooling liquid channel A18 is placed in the cavity at the edge of the pump source structural plate 222; cooling liquid channel A is arranged around the pump source optical device 221 on the pump source structural plate, and cooling liquid channel A is arranged around the optical fiber runway 17 on the main optical path structural plate.

[0080] A cooling liquid interface 11 is provided on one side wall of the pump source structure plate 222 , and is connected to the cooling liquid channel A18 in the laser optical path module 22 .

[0081] like Figure 6 As shown, a groove 225 is provided on one side surface of the pump source structure plate 222 , and the pump source optical device 221 and the main optical path optical device 224 are interconnected by optical fiber through the groove 225 .

[0082] like Figure 6 As shown, a weight reduction cavity 226 is provided at a position on the pump source structural plate 222 where no phase change material and cooling liquid channel are provided.

[0083] like Figure 7 As shown, the driving power module 21 includes:

[0084] A driving power supply device 211; the driving power supply device 211 includes a plurality of sub-power supply devices;

[0085] Driving power supply structure board 212;

[0086] Structural plate reinforcement ribs 213; multiple structural plate reinforcement ribs 213 are installed on the driving power structural plate 212, and multiple sub-power devices are evenly distributed on the driving power structural plate 212 and fixedly installed on the multiple structural plate reinforcement ribs 213;

[0087] The cooling liquid channel B227 is placed in the cavity at the edge of the driving power structure plate 212 and is arranged around the driving power device 211.

[0088] In this embodiment, the four side walls of the driving power structure plate 212 are provided with mounting interfaces 24 for the platform, and the driving power structure plate 212 is connected to the platform through the mounting interfaces 24 for the platform.

[0089] A cooling liquid interface 11 is provided on one side wall of the driving power structure plate 212 and is communicated with a cooling liquid channel 227 in the driving power structure plate 212 .

[0090] like Figure 6 and8 As shown, one end of the load-bearing column 23 is provided with an external thread 231, the other end of the load-bearing column 23 is provided with an internal thread 233, the middle end of the load-bearing column 23 is provided with a wrench slot 232, and multiple fastening screws are provided on the three side walls of the laser optical path module 22, and screw holes are provided on the three side ends of the driving power supply structure plate. The external thread 231 of the load-bearing column 23 is screwed into the screw hole, and the fastening screw is screwed into the internal thread 233 of the load-bearing column 23.

[0091] In this application: the laser optical path module and the driving power module adopt a layered stacking three-dimensional design, and are combined into a frame structure through load-bearing columns; the laser optical path module and the driving power module are relatively independent and can be debugged separately before assembly. Since the laser optical path module is directly connected to the driving power module, the number of electrical connectors is greatly reduced, the length of the connecting cable between the two modules is shortened, and the weight is reduced.

[0092] 1. Compact and lightweight design

[0093] 1.1 Layout optimization design

[0094] The design adopts a three-dimensional and distributed design method: through the layered and stacked three-dimensional design of the driving power module and the laser optical path module, the flat area of ​​the laser light source is reduced, the three-dimensional space is used evenly, and it is also conducive to compact layout and reduced volume; the flat area occupied by the laser optical path is fully utilized, the driving power supply is split into several short power supply devices, the size in the height direction is reduced, and the space layout is optimized; the optical device (pump source) directly connected to the laser optical path and the driving power supply is arranged face to face with the driving power supply, which is convenient for direct connection of cables and shortens the length of the cables between the two.

[0095] 1.2 Integrated design

[0096] The integrated design of laser optical path, thermal management and driving power supply effectively utilizes space and saves materials.

[0097] 1.3 Bearing structure design

[0098] The laser optical path module and the driving power supply module are combined into a frame structure through load-bearing columns. The structure is stable and easy to assemble and disassemble, meeting the goals of "lightweight" and "high strength" of the equipment.

[0099] 2. Detailed design

[0100] 2.1 Laser optical path module

[0101] Laser optical path module Figure 6As shown, the main optical path and pump source of the laser optical path module are arranged on the front and back sides of the optical device mounting plate. The main optical path structure plate and the pump source structure plate are welded (the material is 5A06 aluminum alloy with good welding performance) to form a whole, and the phase change material is encapsulated in the structure plate.

[0102] like Figure 6 As shown in the figure, the optical devices and the optical fiber runway are arranged in the middle of the structural plate, which is also the main source of heat; the surrounding area is reserved for the fiber winding, which generates less heat. Therefore, the phase change material cavity is concentrated in the middle of the structural plate, and an annular coolant channel is opened at the position where the phase change material is not needed. In this way, the integrated design of the phase change heat extraction structure and the liquid cooling heat release channel not only makes full use of the space, but also has the effect of reducing weight, and also realizes the composite thermal management function of phase change heat storage and liquid cooling heat dissipation.

[0103] 2.1.1 Heat Dissipation Estimation

[0104] Assumptions:

[0105] a. The laser output power is 3000W. The electro-optical conversion efficiency is 30%, so the waste heat generated by the laser is P f =(P / 0.3)-P=30000 / 3-3000=7000W;

[0106] b. Laser emission time t c =100s;

[0107] c. The liquid cooling circuit uses pure water as the working fluid (the specific heat capacity of pure water is C p =4200J / (kg·℃)), internal fluid inlet and outlet temperature difference Δt=20℃.

[0108] 2.1.1.1 Traditional Technical Solution - Heat Dissipation Estimation

[0109] If the traditional technical solution 1 is adopted to remove the waste heat in real time through liquid cooling, the required liquid cooling circuit heat release power P s =P f , then the required water mass flow rate is:

[0110]

[0111] The required pure water volume flow rate is then calculated to be 5 L / min.

[0112] 2.1.1.2 Heat Dissipation Estimation of Traditional Technical Solution 2

[0113] If the traditional technical solution 2 is adopted, phase change heat storage, the device shell releases heat to the platform. Since the device shell releases heat to the platform slowly, the power of heat released from the device shell to the platform is generally about tens of watts. Assuming that the power of heat released from the device shell to the platform P1 is 50W, the heat release time is:

[0114]

[0115] 2.1.1.3 Heat dissipation estimation for this application

[0116] This application adopts phase change heat storage and liquid cooling heat dissipation composite thermal management, and the design indicators are based on the cooling liquid at t s = To take away the waste heat within 0.5h, the required heat release power of the liquid cooling circuit is:

[0117]

[0118] Then the required water mass flow rate can be obtained as:

[0119]

[0120] The required pure water volume flow rate is then calculated to be 0.28 L / min.

[0121] To sum up:

[0122] a. The coolant flow rate required by the present application scheme using composite thermal management is only one-seventeenth of the coolant flow rate required by the traditional technical scheme 1, and the required pump power is smaller and the energy consumption is lower;

[0123] b. The heat release time of the present application scheme using composite thermal management is only one eighth of that of the traditional technical scheme 2, which greatly shortens the working interval of the laser.

[0124] 2.2 Driving power module

[0125] Laser optical path module Figure 7 As shown in the figure, the driving power supply is divided into several small devices to make full use of the space and make the heat distribution of the driving power supply more uniform. Since the heat generated by the driving power supply device is relatively small and its ability to withstand high temperatures is strong, the thermal management of the driving power supply adopts the method of temporarily storing the heat in the phase change material in the structural plate during operation and passing the coolant in the working interval to dissipate the heat.

[0126] The driving power supply structural plate adopts a reinforcing rib structure to ensure the rigidity and strength of the structural plate. The arrangement of the reinforcing ribs matches the installation position of the driving power supply device (so that the installation holes fall on the ribs as much as possible). The structural plate material is 6061 aluminum alloy with high strength and good thermal conductivity and light weight.

[0127] 2.3 Support structure

[0128] The external load of the laser light source is mainly the vibration and impact load transmitted by the platform. These loads are borne by the main structure of the light source. Therefore, the main structure of the light source should have sufficient rigidity. If the rigidity of the main structure is small, structural resonance is prone to occur and the connection strength of the structural connection parts is weakened, affecting the performance, reliability, and safety of the laser light source. Therefore, the laser light source structure is as light as possible while ensuring a certain rigidity.

[0129] The dynamic stiffness of the structure is measured by its low-order modes (low-order natural frequencies of the structure). The natural frequency of the structure depends on the distribution of its own weight and stiffness, so the design factors that affect the weight and stiffness distribution will affect the natural frequency of the structure. Under the premise that the aforementioned optical path structure plate and the driving power structure plate remain unchanged, the support structure analysis of the two structure plates connected together will be mainly carried out. As shown in Table 1, it is a comparison of the first-order natural frequencies of different load-bearing structures. By comparing and analyzing the natural frequencies of the supporting structures shown in Table 1, it can be seen that the use of a load-bearing column structure can ensure a certain stiffness and is light in weight.

[0130]

[0131] The bearing column structure is as follows Figure 8 As shown, it plays the role of connection and tightening. A wrench slot is set in the middle of the column for easy operation. The material of the load-bearing column is 7A04 super-duraluminum, which is both light and high-strength.

[0132] During the application, the waste heat generated by the laser light source during operation is absorbed and temporarily stored by the phase change material, and the temporarily stored waste heat is dissipated by the external coolant when the laser light source is on standby; the integrated design of laser optical path, thermal management, and drive power supply realizes the compactness and lightness of the high-power laser light source through the combined frame structure of the load-bearing column, solves the problem of high-power laser light source application in small mobile platforms, and can also be applied to other types of platforms. Taking this design as a unit, the mirror expansion in the height direction can obtain a new laser light source with double power, which has a wider range of applications.

[0133] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-power fiber laser light source with a compact and lightweight structure, characterized in that: include: Driving power module (21); Laser optical path module (22); A plurality of load-bearing columns (23); the driving power module (21) and the laser light path module (22) are stacked in layers, and the driving power module (21) and the laser light path module (22) are fixedly connected to form a frame structure via the plurality of load-bearing columns (23); the electrical connector (12) is disposed on one side of the frame structure, and the electrical connector (12) is used for inputting an external power source and electrically connecting the driving power module (21) and the laser light path module (22); The laser optical path module (22) comprises: A pump source optical device (221); the pump source optical device (221) is installed in the middle of the pump source structural plate (222); A main light path optical device (224); the main light path optical device (224) is mounted on the middle portion of the main light path structural plate (223), and the optical fiber runway (17) and the main light path optical device (224) are arranged side by side; Pump source structural plate (222); A main optical path structural plate (223); after the pump source structural plate (222) and the main optical path structural plate (223) are connected, a cavity is formed inside, and the phase change material is encapsulated in the middle of the pump source structural plate (222) and the main optical path structural plate (223); A cooling liquid channel A (18); the cooling liquid channel A (18) is placed in a cavity at the edge of a pump source structural plate (222); the cooling liquid channel A (18) is arranged on the pump source structural plate (222) around the pump source optical device (221); and the cooling liquid channel A (18) is arranged on the main optical path structural plate (223) around the optical fiber runway (17).

2. According to claim 1, a high-power fiber laser light source has a compact and lightweight structure, characterized in that: A groove (225) is provided on one side surface of the pump source structural plate (222), and the pump source optical device (221) and the main optical path optical device (224) are interconnected via optical fibers through the groove (225).

3. The compact and lightweight structure of a high-power fiber laser source according to claim 1, characterized in that: A weight reduction cavity (226) is provided at a position on the pump source structural plate (222) where no phase change material and cooling liquid channel are provided.

4. The compact and lightweight structure of a high-power fiber laser source according to claim 1, characterized in that: The driving power module (21) comprises: A driving power supply device (211); the driving power supply device (211) comprises a plurality of sub-power supply devices; Driving power supply structure board (212); Structural plate reinforcing ribs (213); a plurality of structural plate reinforcing ribs (213) are mounted on the driving power structural plate (212); a plurality of sub-power devices are evenly distributed on the driving power structural plate (212) and fixedly mounted on the plurality of structural plate reinforcing ribs (213); Cooling liquid channel B (227); the cooling liquid channel B (227) is placed in a cavity at the edge of the driving power structure plate (212) and is arranged around the driving power device.

5. The compact and lightweight structure of a high-power fiber laser source according to claim 4, characterized in that: One end of the load-bearing column (23) is provided with an external thread (231), the other end of the load-bearing column (23) is provided with an internal thread (233), the middle end of the load-bearing column (23) is provided with a wrench slot (232), three platform cold plates of the laser optical path module (22) are provided with a plurality of fastening screws, three side ends of the driving power supply structure plate are provided with screw holes, the external thread (231) of the load-bearing column (23) is screwed into the screw hole, and the fastening screw is screwed into the internal thread (233) of the load-bearing column (23).

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