Fiber laser module

Abstract

The invention discloses an optical fiber laser module, which comprises a shell, a heat conduction table and an optical path device, and is characterized in that the shell comprises a bottom shell and a cover plate, and the bottom shell and the cover plate jointly define a containing cavity; the heat conduction table is arranged in the containing cavity, installed on the side, away from the cover plate, of the bottom shell and connected with the cover plate. The light path device comprises a high-reflection grating, a gain fiber, a low-reflection grating and a cladding light filter which are located in the containing cavity and connected in sequence, the gain fiber surrounds the heat conduction table and is coiled layer by layer in the direction away from the heat conduction table, the connection position of the gain fiber and the high-reflection grating is a first connection position, and the cladding light filter is located on the side, away from the first connection position, of the heat conduction table; the optical fibers and the gain optical fibers are arranged at intervals. According to the scheme, a hot area can be dispersed, heat is better dispersed, heat accumulation is avoided, the heat dissipation efficiency is improved, a water cooling pipeline does not need to be arranged, the size of the optical fiber laser module is reduced, potential safety hazards of liquid leakage and electric leakage are effectively eliminated, mechanical deformation of the cover plate can be corrected, and the quality of the module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber lasers, and particularly to a fiber laser module. Background Art

[0002] To improve the working efficiency of a fiber laser, it is necessary to control the temperature of the optical components in the fiber laser, that is, to dissipate the heat generated during the working process as soon as possible.

[0003] Publication No. CN112490827A discloses a fiber laser, which sets an upper cover plate on one side of a water-cooled plate. An upper closed space is formed between the upper cover plate and the water-cooled plate, and the fiber coiling plate assembly, the pump source, and the cooling device are all arranged in the upper closed space. That is, the pump source and the fiber coiling plate assembly are arranged on the same side of the water-cooled plate, which can facilitate the fusion splicing of the pump source and the passive device. At the same time, during testing, it can also monitor the temperature of the pump source and the optical fiber, and can perform optoelectronic integrated sealing to adapt to a more complex environment.

[0004] However, in the prior art, fiber lasers with water-cooled heat dissipation and phase change heat dissipation are relatively large in volume and have potential safety hazards of liquid leakage and electric leakage. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and propose a fiber laser module to solve the technical problems that fiber lasers with water-cooled heat dissipation and phase change heat dissipation in the prior art are relatively large in volume and have potential safety hazards of liquid leakage and electric leakage.

[0006] To achieve the above technical purpose, the present invention adopts the following technical solutions: The present invention provides a fiber laser module, including: A housing, forming a cavity; A heat conduction table, arranged in the cavity and having a plurality of heat conduction ends, and the plurality of heat conduction ends are respectively connected to the inner wall of the cavity; and An optical path device, including a high-reflection grating, a gain fiber, a low-reflection grating, and a cladding light filter that are located in the cavity and are connected in sequence. The gain fiber is arranged around the heat conduction table. The connection between the gain fiber and the high-reflection grating is the first connection. The cladding light filter is located on the side of the heat conduction table away from the first connection and is arranged at an interval from the gain fiber.

[0007] In some embodiments, the gain fiber is arranged around the heat conduction table, and is arranged layer by layer in a direction away from the heat conduction table, and is attached to the inner wall of the cavity.

[0008] In some embodiments, the housing includes a bottom shell and a cover plate, and the bottom shell and the cover plate are connected to each other and enclose to form the cavity; There are two heat-conducting ends, and the two heat-conducting ends are respectively connected to the cover plate and the side of the cavity away from the cover plate.

[0009] In some embodiments, an optical fiber groove and a mounting groove are provided on the inner side of the bottom wall of the bottom shell, and the mounting groove is arranged at an interval from the optical fiber groove; The heat-conducting table is arranged in the middle of the optical fiber groove, the gain optical fiber disk is arranged in the optical fiber groove, the first connection part is located on the side of the heat-conducting table away from the mounting groove, and the cladding light filter is arranged in the mounting groove.

[0010] In some embodiments, through holes are respectively provided on the bottom shell, the heat-conducting table and the cover plate, and the through holes of the bottom shell, the heat-conducting table and the cover plate are communicated in sequence.

[0011] In some embodiments, a receiving groove is provided on the cover plate along the direction away from the bottom shell, the receiving groove is located on the side of the heat-conducting table away from the cladding light filter, and is located on the side of the gain optical fiber away from the heat-conducting table; The fiber laser module further includes a beam combiner, the beam combiner is arranged in the receiving groove, and is connected to the incident end of the high reflection grating.

[0012] In some embodiments, the heat-conducting table is provided with a wire routing channel, and the opposite sides of the wire routing channel are open; and / or, The fiber laser module further includes an indicating light cladding mode filter, the indicating light cladding mode filter is arranged in the cavity, is on the same side of the heat-conducting table as the cladding light filter, and its output end is connected to the signal input arm of the beam combiner.

[0013] In some embodiments, the cover plate is provided with a plurality of joint grooves, the plurality of joint grooves are arranged at intervals along the direction away from the heat-conducting table, and are located on the side of the heat-conducting table away from the first connection part.

[0014] In some embodiments, the bottom shell and the cover plate are detachably connected.

[0015] In some embodiments, the bottom shell has a cavity with one side open, and a plurality of threaded holes are provided corresponding to the opening of the cavity, and a plurality of connection holes are provided on the cover plate corresponding to the threaded holes; The housing further includes a plurality of mounting bolts, the plurality of mounting bolts respectively correspond to the plurality of threaded holes and the plurality of connection holes, and each mounting bolt sequentially passes through the corresponding connection hole and is screwed into the threaded hole.

[0016] In some embodiments, the fiber laser module further includes a heat-conducting sealant, and the heat-conducting sealant is coated between the gain optical fiber and the inner wall of the cavity.

[0017] In some embodiments, a plurality of mounting holes are provided at intervals on the periphery of the bottom case, and / or the bottom case is integrally provided with the heat conducting table.

[0018] Compared with the prior art, in the fiber laser module provided by the present invention, a plurality of heat conducting ends of the heat conducting table are simultaneously connected to the inner wall of the cavity. On the one hand, the heat conducting table arranged in a raised manner can increase the contact area between the side walls of the housing, improve the heat conducting performance, and correct the mechanical deformation of the housing, so that heat can be better conducted to the inner wall of the housing and dissipated through the plurality of side walls of the housing at the same time, that is, it is convenient for the gain fiber to conduct heat quickly and evenly through multiple points of the housing; on the other hand, the welding joint (the first joint) between the gain fiber and the high reflection grating and the cladding light filter can be placed at a position as far as possible, that is, the first joint and the cladding light filter can be placed on opposite sides of the heat conducting table, so as to avoid the accumulation of two high heat points, isolate and conduct the heat of the cladding light filter, and avoid the accumulation of heat at the gain fiber.

[0019] In this way, the heat areas can be dispersed in this solution, the heat can be better dispersed, the heat accumulation can be avoided, the heat dissipation efficiency can be improved, at the same time, there is no need to set up a water cooling pipeline, the volume of the fiber laser module can be reduced, the potential safety hazards of liquid leakage and electric leakage can be effectively eliminated, and the mechanical deformation of the housing can be corrected, so as to improve the quality of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an exploded view of the fiber laser module provided by the embodiment of the present invention (showing some optical path devices); Figure 2 is Figure 1 a schematic connection diagram of the optical path devices of the fiber laser module in Figure 3 is Figure 1 a schematic diagram of the main internal and external connection devices of the fiber laser module in Figure 4 is Figure 1 a schematic diagram of the bottom case in

[0021] DESCRIPTION OF THE REFERENCE NUMERALS 1. Bottom case; 1a. Fiber groove; 1b. Installation groove; 1c. Fixing groove; 1d. Threaded hole; 1e. Mounting hole; 2. Cover plate; 2a. Connector groove; 2b. Connection hole; 21. Encapsulation box body; 3. Heat conducting table; 3a. Wiring channel; 4. Optical path device; 41. High reflection grating; 42. Gain fiber; 43. Low reflection grating; 44. Cladding light filter; 45. First joint; 5. Through hole; 6. Beam combiner; 7. Pump source; 8. Laser adapter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] In order to solve the technical problem that the fiber lasers with water-cooled heat dissipation and phase-change heat dissipation in the prior art are relatively large in volume and have potential safety hazards of liquid leakage and electric leakage, the present invention provides a fiber laser module, which can disperse the heat zones, better disperse the heat, avoid heat accumulation, improve the heat dissipation efficiency, reduce the volume of the fiber laser module, effectively eliminate the potential safety hazards of liquid leakage and electric leakage, and can correct the mechanical deformation of the cover plate to improve the module quality.

[0024] Please refer to Figures 1 to 3 , Figures 1 to 3 which is a schematic structural diagram of a fiber laser module in an embodiment of the present invention. The fiber laser module includes a housing, a heat conduction table 3 and an optical path device 4. The housing forms a cavity; the heat conduction table 3 is arranged in the cavity and has a plurality of heat conduction ends, and the plurality of heat conduction ends are respectively connected to the inner wall of the cavity; the optical path device 4 includes a high-reflection grating 41, a gain fiber 42, a low-reflection grating 43 and a cladding light filter 44 that are located in the cavity and are connected in sequence. The gain fiber 42 is arranged around the heat conduction table 3. The connection between the gain fiber 42 and the high-reflection grating 41 is a first connection 45. The cladding light filter 44 is located on one side of the heat conduction table 3 away from the first connection 45 and is arranged at intervals with the gain fiber 42.

[0025] In the fiber laser module provided by the present invention, the plurality of heat conduction ends of the heat conduction table 3 are simultaneously connected to the inner wall of the cavity. On the one hand, the heat conduction table 3 set at a higher position can increase the contact area between the side walls of the housing, improve the heat conduction performance, and correct the mechanical deformation of the housing, so that the heat can be better conducted to the inner wall of the housing and dissipated through the plurality of side walls of the housing at the same time, that is, it is convenient for the gain fiber 42 to conduct heat quickly and evenly through multiple points of the housing; on the other hand, it can place the fusion joint (the first connection 45) between the gain fiber 42 and the high-reflection grating 41 as far away as possible from the cladding light filter 44, that is, it can place the first connection 45 and the cladding light filter 44 on opposite sides of the heat conduction table 3 to avoid the accumulation of two high-heat points, isolate and conduct the heat of the cladding light filter 44, and avoid heat accumulation at the gain fiber 42.

[0026] In this way, this solution can disperse the heat zones, better disperse the heat, avoid heat accumulation, improve the heat dissipation efficiency, at the same time, there is no need to set up water-cooling pipelines, reduce the volume of the fiber laser module, effectively eliminate the potential safety hazards of liquid leakage and electric leakage, and can correct the mechanical deformation of the housing to improve the module quality.

[0027] It should be noted that generally, the radiator is attached to the outer side of the bottom case 1, and the heat is mainly conducted to the radiator through the bottom case 1, so as to improve the device compactness while ensuring the heat transfer efficiency. In another embodiment, in order to further improve the heat dissipation efficiency of the fiber laser module, a heat sink or other types of radiators can be attached to the opposite outer sides of the bottom case 1 and the cover plate 2 respectively.

[0028] In one embodiment, the gain fiber 42 surrounds the heat conduction table 3, and is arranged layer by layer along the direction away from the heat conduction table 3, and fits against the inner wall of the cavity.

[0029] In this embodiment, the gain fiber 42 is wound around the heat conduction table 3 and arranged layer by layer along the direction away from the heat conduction table 3, so as to avoid heat accumulation in the gain fiber 42 itself. At the same time, the heat of the gain fiber can be evenly transferred through the housing, and transferred to multiple side walls of the housing through the heat conduction table 3, improving the heat dissipation efficiency.

[0030] In one embodiment, the housing includes a bottom case 1 and a cover plate 2. The bottom case 1 and the cover plate 2 are connected and enclosed to form a cavity; there are two heat conduction ends, and the two heat conduction ends are respectively connected to the cover plate 2 and the side of the cavity away from the cover plate 2.

[0031] In this embodiment, two heat conduction ends are provided, that is, both ends of the heat conduction table 3 are connected to the bottom wall of the bottom case 1 and the cover plate 2 at the same time, so that the heat conduction table 3 can stably support the bottom case 1 and the cover plate 2. While improving the heat transfer efficiency, it can correct the mechanical deformation of the cover plate 2 and improve the module quality.

[0032] In one embodiment, please refer to Figure 1 and Figure 4 , on the inner side of the bottom wall of the bottom case 1, there are an optical fiber groove 1a and a mounting groove 1b. The mounting groove 1b and the optical fiber groove 1a are arranged at intervals; the heat conduction table 3 is arranged in the middle of the optical fiber groove 1a, the gain fiber 42 is coiled in the optical fiber groove 1a, the first connection part 45 is located on the side of the heat conduction table 3 away from the mounting groove 1b, and the cladding light filter 44 is arranged in the mounting groove 1b.

[0033] In this embodiment, the gain grating is coiled layer by layer in the optical fiber groove 1a, and the cladding light filter 44 is placed in the mounting groove 1b, so that the cladding light filter 44 and the gain fiber 42 can be separated by the side walls of the two grooves, further isolating the heat conduction of the cladding light filter 44 and avoiding heat accumulation at the gain fiber 42, improving the heat dissipation efficiency.

[0034] In one embodiment, the bottom case 1, the heat conduction table 3 and the cover plate 2 are respectively provided with through holes 5, and the through holes 5 of the bottom case 1, the heat conduction table 3 and the cover plate 2 are sequentially communicated.

[0035] In this embodiment, through holes 5 are respectively provided on the bottom case 1, the heat conduction table 3 and the cover plate 2, and the through holes 5 of the three are communicated to enhance the connection between the upper cover plate 2, the heat conduction table 3, the bottom case 1 and the external radiator, correct the planar mechanical deformation, make the fit between adjacent two more tight, and improve the heat transfer efficiency. It should be noted that in this solution, two through holes 5 are respectively provided on the bottom case 1, the heat conduction table 3 and the cover plate 2.

[0036] In one of the embodiments, the cover plate 2 is provided with a receiving groove in a direction away from the bottom case 1. The receiving groove is located on a side of the heat conduction table 3 away from the cladding mode stripper 44 and on a side of the gain fiber 42 away from the heat conduction table 3. The fiber laser module further includes a beam combiner 6. The beam combiner 6 is disposed in the receiving groove and is connected to the incident end of the high reflection grating 41.

[0037] In this embodiment, a beam combiner 6 is further provided in the housing, and the beam combiner 6 is placed in the receiving groove of the cover body. At this time, a wire passing hole can be provided in the receiving groove of the cover body for wire routing. Specifically, in this solution, the beam combiner 6 is fixed to the bottom case 1 by fixing bolts. It should be understood that the receiving groove is recessed in the cover plate 2 in a direction away from the bottom case 1, so that a convex package box body 21 is formed on a side of the cover plate 2 away from the bottom case 1 for installing the beam combiner 6. In addition, the beam combiner 6 is fixed to the bottom case 1 by bolts.

[0038] It should be noted that in one embodiment, the beam combiner 6 includes a first pump arm, a second pump arm, a signal input arm and a signal output arm. The first pump arm and the second pump arm of the beam combiner 6 are respectively connected to the pump source 7, and the signal output arm is connected to the high reflection grating 41.

[0039] In addition, in another embodiment, the beam combiner 6 is placed outside the module, reducing the number of devices in the module and having more available space to increase the overall coiling length, which is applicable to the gain fiber 42 solution with a larger core diameter. In this embodiment, the cover plate 2 is changed to have no protrusion, a hole is dug on the surface, the side where the optical fiber is accessed is made into a slope shape, and the four sides are chamfered and smoothly transitioned.

[0040] In one of the embodiments, the heat conduction table 3 is provided with a wire routing channel 3a, and the opposite sides of the wire routing channel 3a are open. The fiber laser module further includes an indicating cladding mode stripper. The indicating cladding mode stripper is disposed in the cavity, is on the same side of the heat conduction table 3 as the cladding mode stripper 44, and its output end is connected to the signal input arm of the beam combiner 6. In addition, a fixing groove 1c is further provided on a side of the installation groove 1b close to the heat conduction table 3. The fixing groove 1c is disposed on a side of the optical fiber groove 1a close to the installation groove 1b for installing the indicating cladding mode stripper.

[0041] In this embodiment, the indicating cladding mode stripper is connected to the signal input arm of the beam combiner 6 to Figure 4For example, the pump arm and the signal input arm of the beam combiner 6 are accessed from the upper left side. The beam combiner 6 is fixed at the corresponding hole positions, and the signal output arm is wound clockwise into the optical fiber groove 1a. The signal output arm is fusion spliced to the incident end of the high reflection grating 41 and coated with protective glue, and this fusion splice point is wound into the optical fiber groove 1a near the beam combiner 6 end. Therefore, it is necessary to reserve an appropriate length for the signal output arm of the beam combiner 6. There is a height difference between the inner bottom surface of the bottom case 1 and the optical fiber groove 1a to avoid squeezing between the optical fibers.

[0042] The output end of the low reflection grating 43 is connected to the cladding mode stripper 44, and the output end of the cladding mode stripper 44 is at the lower right of the bottom case 1, so that it is convenient to lead the optical fiber counterclockwise from the wire passing hole of the accommodating groove in the upper left. At this time, the input end of the cladding mode stripper 44 is at the lower left of the bottom case 1, and the output end of the low reflection grating 43 is placed along the outer edge of the optical fiber groove 1a in the clockwise direction.

[0043] Therefore, the wire routing direction needs to be reversed at the fusion splice between the output end of the low reflection grating 43 and the input end of the cladding mode stripper 44, and the central wire routing channel 3a is used to realize the change of the winding direction. One embodiment is: the fusion splice point between the output end of the low reflection grating 43 and the input end of the cladding mode stripper 44 is placed on the outer edge of the optical fiber groove 1a and close to the beam combiner 6, that is, above the bottom case 1, with the output end of the low reflection grating 43 on the left and the input end of the cladding mode stripper 44 on the right. The input end of the cladding mode stripper 44 is introduced into the left side of the central wire routing channel 3a clockwise from the left end of the installation groove 1b, and after being led out from the right side of the central wire routing channel 3a, it is wound counterclockwise into the outer edge of the optical fiber groove 1a.

[0044] The input end of the indicating optical cladding mode stripper needs to be led out from the wire passing hole of the accommodating groove in the upper left. During installation, the input end of the indicating optical cladding mode stripper faces right and the output end faces left. The signal input arm of the beam combiner 6 is in the upper left and needs to be wound counterclockwise to be fusion spliced to the output end of the indicating optical cladding mode stripper. In one embodiment, this fusion splice point is placed in the wire routing channel 3a, and the signal input arm end of the beam combiner 6 needs to be wound half a circle from the outer edge of the optical fiber groove 1a and then into the wire routing channel 3a. In the wire routing channel 3a, the signal input arm end of the beam combiner 6 is on the right and the output end of the indicating optical cladding mode stripper is on the left.

[0045] For the above device connections, there are optical fibers placed outside the optical fiber groove 1a and intersecting pairwise. The height difference between the outer edge of the bottom case 1 and the inside of the bottom case 1 can avoid squeezing of the optical fibers here.

[0046] In one embodiment, the cover plate 2 is provided with a plurality of joint grooves 2a, and the plurality of joint grooves 2a are arranged at intervals along the direction away from the heat conducting table 3 and are located on the side of the heat conducting table 3 away from the first connection part 45.

[0047] In this embodiment, a plurality of joint grooves 2a are provided on the cover plate 2 for placing the fusion joints of the optical fibers to avoid heat accumulation. Specifically, in this solution, there are at least three joint grooves 2a, which are used to place the fusion melting points of the pump source 7 and the indicating light cladding mode filter, the fusion melting point of the pump output fiber and the pump arm of the beam combiner 6, and the fusion melting point of the cladding light filter 44 and the QBH (laser adapter 8) in sequence. In one embodiment, the pump source 7 is a red light pump, and the indicating light cladding mode filter is a red light cladding mode filter.

[0048] In one embodiment, the bottom case 1 and the cover plate 2 are detachably connected.

[0049] In this embodiment, the bottom case 1 and the cover plate 2 are set to be detachably connected, so as to facilitate the timely repair and replacement of the internal devices of the housing, so that any device in the module can be directly replaced when it is damaged.

[0050] It should be noted that the detachable structure of the bottom case 1 and the cover plate 2 is not limited. In one embodiment, the bottom case 1 and the cover plate 2 are detachably connected through a buckle and a slot. In another embodiment, the bottom case 1 and the cover plate 2 are detachably connected through the interference fit between the notch and the side wall.

[0051] In another embodiment, the bottom case 1 has a cavity with an opening on one side, and a plurality of threaded holes 1d are provided corresponding to the opening of the cavity. The cover plate 2 is provided with a plurality of connection holes 2b corresponding to the threaded holes 1d; the housing further includes a plurality of mounting bolts, and the plurality of mounting bolts respectively correspond to the plurality of threaded holes 1d and the plurality of connection holes 2b. Each mounting bolt passes through the corresponding connection hole 2b in sequence and is screwed into the threaded hole 1d.

[0052] In this embodiment, the cover plate 2 and the bottom case 1 are detachably connected by passing the mounting bolts through the connection holes 2b of the cover plate 2 and screwing them into the threaded holes 1d of the bottom case 1, and the structure is stable and reliable. Specifically, in this solution, there are five connection holes 2b on the cover plate 2 and five threaded holes 1d on the bottom case 1 respectively.

[0053] In one embodiment, the fiber laser module further includes a thermally conductive sealant, which is coated between the gain fiber 42, the bottom case 1 and the cover plate 2.

[0054] In this embodiment, the heat-generating gain fiber 42 is placed in the fiber groove 1a and coated with a thermally conductive sealant to improve the heat conduction efficiency and play a certain protective role for the gain fiber 42. It should be noted that the thermally conductive sealant is thermally conductive silicone grease or high thermal conductivity sealant.

[0055] In one embodiment, a plurality of mounting holes 1e are provided at intervals on the periphery of the bottom case 1, and the bottom case 1 and the heat conduction table 3 are integrally provided.

[0056] In this embodiment, a plurality of mounting holes 1e are arranged at intervals on the periphery of the bottom case 1, so as to facilitate fixing the bottom case 1 on an external radiator and improve the mounting stability. Specifically, in this solution, 6 mounting holes 1e for assembling with the radiator are arranged at intervals on the periphery of the bottom case 1. In addition, in this solution, the bottom case 1 and the heat conduction table 3 are integrally provided to facilitate molding. And in one embodiment, the bottom case 1, the heat conduction table 3 and the cover plate 2 are made of aluminum alloy.

[0057] It should be understood that in this solution, the outer edge of the bottom case 1 is higher than the inner bottom surface and higher than the optical fiber groove 1a, the heat conduction table 3 is at the same height as the outer edge of the bottom case 1, and the bottom surface of the wire routing channel 3a is at the same height as the inner bottom surface of the bottom case 1. The heights of the slot positions of the indicating light cladding mode filter and the mounting slot 1b of the cladding light filter 44 are both lower than the inner bottom surface of the bottom case 1, facilitating the optical fiber to enter and exit from the wire passing hole of the accommodating groove without being squeezed.

[0058] For a better understanding of the present invention, the following is combined with Figures 1 to 4 to elaborate in detail on the technical solution of the present invention: The fiber laser module of the present invention includes a bottom case 1, a cover plate 2 and an optical path device 4 installed between the two. The main optical path device 4 of the fiber laser module is integrated on the bottom case 1 and is sequentially connected in the order of an indicating light cladding mode filter - a combiner 6 - a high reflection grating 41 - a gain fiber 42 - a low reflection grating 43 - a cladding light filter 44. After the fiber laser module is connected to devices such as a pump source 7, an optical fiber connector, an electronic control module and a radiator, the function of outputting laser of kilowatt level can be realized.

[0059] This module uses common hole positions to fix the bottom case 1 and the cover plate 2 for encapsulation to increase the overall structural stability. Any device in the module can be directly replaced if damaged. The heat - generating gain fiber 42 is placed in the optical fiber groove 1a and coated with silicone grease to dissipate heat. The heat - generating areas of this module are dispersedly arranged. By reasonably arranging the positions of the relatively high - temperature fusion joints and the cladding light filter 44, the heat flux density per unit area is reduced and the heat dissipation pressure is decreased.

[0060] Moreover, the fiber laser module of this solution can perform laser optical work of kilowatt level. It is a high - performance and compact - designed device. Through a simplified connection method, users only need to connect four main components, namely the pump source 7, the optical fiber connector, the electronic control module and the radiator, to achieve the output of high - power laser.

[0061] This modular design not only facilitates the installation and maintenance for users, but also improves the stability and reliability of the system. It adopts air-cooled heat dissipation technology, which can effectively discharge the heat generated during the working process, ensuring that the temperature of the module is controlled below 65°C during long-term operation, far lower than the high temperature that may affect the performance and lifespan of the equipment. Such temperature control not only helps to maintain the stability of laser output, but also extends the service life of the module.

[0062] Meanwhile, this module can provide a laser power stably higher than one kilowatt, which enables it to handle various high-demand industrial applications such as material cutting, welding, and marking. The wide coverage of the power range, from 10W to 1000W, enables this module to adapt to different application requirements. Whether it is fine microfabrication or heavy industrial applications that require high power, this module can provide the corresponding laser output.

[0063] In addition, the optical-optical efficiency exceeds 72%, which means that the module can convert more electrical energy into laser energy. When the output power reaches 1000W, the power fluctuation is less than 1% during short-term operation for 10 minutes, and less than 2% during long-term operation for 24 hours, with high power stability. At the same time, the beam quality M2 value (the ratio between the actual beam and the ideal Gaussian beam) is lower than 1.2, and the beam quality is good, which is crucial for improving the processing accuracy and efficiency. In terms of design, the weight of this module is strictly controlled within 1.1kg, making it both lightweight and convenient for carrying and installation.

[0064] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A fiber laser module, characterized in that: include: A housing is formed with a cavity; A heat conducting platform is disposed in the cavity and has a plurality of heat conducting ends, wherein the plurality of heat conducting ends are respectively connected to the inner wall of the cavity; and The optical path device comprises a high-reflection grating, a gain fiber, a low-reflection grating and a cladding light filter which are located in the cavity and connected in sequence, the gain fiber is arranged around the heat conduction platform, the connection between the gain fiber and the high-reflection grating is a first connection, and the cladding light filter is located on a side of the heat conduction platform away from the first connection and is arranged at intervals from the gain fiber.

2. The fiber laser module according to claim 1, characterized in that: The gain optical fiber surrounds the heat-conducting platform, is arranged layer by layer in a direction away from the heat-conducting platform, and is in contact with the inner wall of the cavity.

3. The fiber laser module according to claim 1, characterized in that: The housing comprises a bottom shell and a cover plate, wherein the bottom shell is connected to the cover plate and encloses the cavity; There are two heat-conducting ends, and the two heat-conducting ends are respectively connected to the cover plate and a side of the cavity away from the cover plate.

4. The fiber laser module according to claim 3, characterized in that: An optical fiber groove and an installation groove are provided on the inner side of the bottom wall of the bottom shell, and the installation groove is spaced apart from the optical fiber groove; The heat conduction platform is arranged in the middle of the optical fiber slot, the gain optical fiber plate is arranged in the optical fiber slot, the first connection point is located at a side of the heat conduction platform away from the installation slot, and the cladding light filter is arranged in the installation slot.

5. The fiber laser module according to claim 3, characterized in that: The bottom shell, the heat conducting platform and the cover plate are respectively provided with through holes, and the through holes of the bottom shell, the heat conducting platform and the cover plate are connected in sequence.

6. The optical fiber laser module according to claim 3, characterized in that: The cover plate is provided with a receiving groove in a direction away from the bottom shell, and the receiving groove is located on a side of the heat conducting platform away from the cladding light filter, and is located on a side of the gain optical fiber away from the heat conducting platform; The optical fiber laser module further comprises a beam combiner, which is arranged in the accommodating groove and connected to the incident end of the high-reflection grating.

7. The optical fiber laser module according to claim 6, characterized in that: The heat conducting platform is provided with a wiring channel, and the wiring channel is open on two opposite sides; and / or, The fiber laser module also includes an indicator light cladding mode filter, which is arranged in the cavity and located on the same side of the heat conduction platform as the cladding light filter, and its output end is connected to the signal input arm of the beam combiner.

8. The fiber laser module according to claim 3, characterized in that: The cover plate is provided with a plurality of joint grooves, and the plurality of joint grooves are arranged at intervals in a direction away from the heat conducting platform and are located on a side of the heat conducting platform away from the first connection point.

9. The optical fiber laser module according to claim 3, characterized in that: A plurality of mounting holes are arranged at intervals on the periphery of the bottom shell, and / or the bottom shell and the heat conducting platform are arranged integrally.

10. The fiber laser module according to claim 1, characterized in that: The fiber laser module further includes a thermally conductive sealant, which is coated between the gain fiber and the inner wall of the cavity.

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