Fiber laser coupling module

Abstract

The invention discloses an optical fiber laser coupling module which comprises an outer box and a water-cooling heat dissipation plate located in the outer box, a main control circuit board and a plurality of space laser coupling modules are installed on the water-cooling heat dissipation plate, the space laser coupling modules are electrically connected with the main control circuit board, optical fibers of the space laser coupling modules are combined into bundled optical fibers, and the bundled optical fibers are connected with the main control circuit board. The bundled optical fiber passes through the outer box; the space laser coupling module comprises a main body, a first light beam module and a second light beam module, the first light beam module and the second light beam module are oppositely arranged on the two sides of the main body, a first reflecting mirror set is arranged on a light path corresponding to the first light beam module, and a second reflecting mirror set is arranged on a light path corresponding to the second light beam module. A polarizing film and a third reflecting mirror are sequentially arranged on a light path corresponding to reflection of the first reflecting mirror set, a polarizing beam splitter is arranged on a light beam path corresponding to the third reflecting mirror, and a light beam reflected by the third reflecting mirror and a light beam reflected by the second reflecting mirror set coincide on the polarizing beam splitter. Coincident light beams on the polarizing beam splitter pass through the focus lens I to form a focus and enter the optical fiber; the space laser coupling module is used for replacing a traditional single-fiber laser module, so that the defects of low power, large size, low resolution, energy dispersion, high interference risk, low optical adaptability, poor circuit control adaptability and the like of the fiber laser module are overcome, the power of the bundled fiber is improved, and the power consumption of the bundled fiber is reduced. Therefore, the power of the bundled optical fiber is increased on the premise that the size is not increased, and the scene of high-power use requirements is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical fiber coupling, and in particular relates to an optical fiber laser coupling module. Background Art

[0002] With the development of market applications, the power of modules used in LDI exposure machines and solder mask machines needs to be gradually increased. Traditional fiber laser modules use a single laser tube to bundle and then output through bundled optical fibers. This design module is large in size and the equipment installation space is limited, resulting in the inability to increase the power of a single unit. At the same time, the large fiber core at the beam output end leads to low imaging resolution, energy dispersion, increased interference risk, and limited optical adaptability. These problems are obvious in high-end circuit board manufacturing and solder mask applications. At the same time, the existing fiber laser module control is overall control, and the application adaptability is poor. Summary of the Invention

[0003] The object of the present invention is to provide a fiber laser coupling module to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A fiber laser coupling module includes an outer box and a water-cooled heat sink located within the outer box. A main control circuit board and a plurality of spatial laser coupling modules are mounted on the water-cooled heat sink. The plurality of spatial laser coupling modules are electrically connected to the main control circuit board. The optical fibers of the plurality of spatial laser coupling modules are bundled into a clustered optical fiber, which passes through the outer box.

[0006] The spatial laser coupling module includes a main body and a beam module 1 and a beam module 2 arranged opposite to each other on both sides of the main body. A reflector group 1 is arranged on the light path corresponding to the beam module 1, and a reflector group 2 is arranged on the light path corresponding to the beam module 2. A polarizer and a reflector 3 are arranged in sequence on the light path reflected by the reflector group 1, and a polarizing beam splitter is arranged on the light path corresponding to the reflector 3. The reflected light beam of the reflector 3 overlaps with the reflected light beam of the reflector group 2 on the polarizing beam splitter. A focusing mirror 1 is also arranged in the main body. The overlapping light beams on the polarizing beam splitter pass through the focusing mirror 1 to form a focus and enter the optical fiber.

[0007] A further technical solution is that the beam module 1 includes several laser diodes and a main body block, the main body block is provided with several mounting holes, the laser diode is provided with a pressure ring, the outer wall of the pressure ring abuts against the wall of the mounting hole, and the laser diode is provided with a focusing mirror 2, and the light beam emitted by the laser diode passes through the focusing mirror 2 to reach the reflector group 1.

[0008] According to a further technical solution, the reflector group 1 includes several reflectors 1, and the light reflected from the several reflectors 1 all passes through the polarizer to reach the reflector 3.

[0009] A further technical solution is that a circuit board is provided on the side of the main body block facing away from the reflector group 1, the circuit board is electrically connected to the laser diode, the outer box is provided with a power through hole, the outer box is provided with a circuit connection component, the circuit connection component is electrically connected to the circuit board through the power through hole, and the circuit board is connected to the main control circuit board through the circuit connection component.

[0010] A further technical solution is that a fiber optic holder, a fiber optic fixing nut and an optical fiber are provided on the light path corresponding to the focusing mirror 1, the outer box is provided with a light through hole, the light converged by the focusing mirror 1 reaches the fiber optic holder through the light through hole, and the fiber optic fixing nut is used to fix the optical fiber on the fiber optic holder.

[0011] A further technical solution is that a circulating cooling pipe is provided in the hollow space inside the water-cooled heat sink, and the circulating cooling pipe is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both provided with a water cooling joint and a water cooling joint nut, and the outer box is provided with a water cooling hole, the water cooling joint passes through the water cooling hole, and the water cooling joint is connected to the water inlet or the water outlet, and the water cooling joint nut is used to open or close the water cooling joint; a thermal pad is provided between the main control circuit board and the water-cooled heat sink.

[0012] A further technical solution is that the water-cooled heat sink is provided with an avoidance groove, which is used to avoid the connection of several optical fibers. A through hole is provided on the side of the outer box close to the avoidance groove. The outer box is provided with a connector base, a soft rubber cap and a fixing nut. The connector base is fixedly connected to the outer box, the soft rubber sleeve is sleeved on the inner wall of the connector base, the fixing nut is threadedly connected to the connector base, and the bundled optical fiber passes through the connector base and the soft rubber sleeve.

[0013] According to a further technical solution, a lug plate is provided on one side of the outer box close to the avoidance groove, one end of the lug plate is connected to the outer box, and the other end of the lug plate is provided with a plurality of adjustment holes.

[0014] Beneficial effects of the present invention:

[0015] The light beam module 1 and the light beam module 2 of the present invention respectively emit multiple laser light beams from opposite sides of the main body. The light beam emitted by the light beam module 1 propagates along the first light path, first passes through the reflector group 1 to adjust its direction, and then is further reflected by the reflector 3 to the polarization beam splitter; the light beam emitted by the light beam module 2 propagates along the second light path, passes through the reflector group 2 to adjust its direction and directly reaches the polarization beam splitter; at the polarization beam splitter, the reflected light beams of the first light path and the second light path overlap to form a superimposed light beam; this superimposed light beam then passes through the focusing mirror 1 and is converged to the output target to form a high-power optical fiber; it is worth noting that the beam sizes of the first light path and the second light path can be the same or different, but overlap on the light path from the polarization beam splitter to the focusing mirror 1 to ensure efficient coupling of the light beams; the spatial laser coupling module effectively solves the problem of excessive beam size and reduced coupling efficiency in traditional modules due to the increase in the number of laser diodes through the light beam module 1 and the light beam module 2 set in opposite directions and the light path overlap design of the polarization beam splitter. The two groups of light beams overlap at the polarization beam splitter, reducing the amount of light entering the focusing mirror 1. The overall beam size enables the focusing mirror to more efficiently converge the light beam to the optical fiber area, thereby improving the coupling efficiency. At the same time, the dual optical path design avoids the linear growth of the module length when the number of laser diodes increases, shortens the total length of the optical path, makes the module more compact, reduces space occupancy, and adapts to more usage scenarios. In addition, it reduces the need for multiple focusing, simplifies the optical structure, reduces energy loss and system complexity, and further improves the system performance and stability. In addition, the main control circuit board and several space laser coupling modules in the outer box are cooled by a water-cooled heat sink, which is conducive to heat dissipation and prevents deformation of the optical lens in the space laser coupling module. The space laser coupling module is electrically connected to the main control circuit board. The main control circuit board can control the opening and closing of the space laser coupling module, thereby improving the user experience and adapting to more usage scenarios. The space laser coupling module replaces the traditional single optical fiber, thereby increasing the power of the optical fiber, thereby increasing the power of the bundled optical fiber without increasing the number of optical fibers, and meeting the scenarios with high power usage requirements.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : The overall structure of the present invention Figure 1 .

[0018] Figure 2 : The overall structure of the present invention Figure 2 .

[0019] Figure 3 : Internal structure diagram of the present invention.

[0020] Figure 4 :The present invention Figure 3Magnified view of part A.

[0021] Figure 5 : The overall structural diagram of the space laser coupling module of the present invention.

[0022] Figure 6 : Exploded view of the space laser coupling module of the present invention.

[0023] Figure 7 : A structural diagram of the spatial laser coupling module of the present invention with the local main body hidden.

[0024] Figure 8 : Schematic diagram of the light of the spatial laser coupling module of the present invention.

[0025] Figure 9 : Exploded view of the present invention.

[0026] Figure 10 : A cross-sectional view of a water-cooled heat sink of the present invention.

[0027] Reference numerals: 1, spatial laser coupling module; 11, main body; 12, beam module 1; 121, laser diode; 122, main body block; 123, mounting hole; 124, pressure ring; 13, beam module 2; 14, reflector group 1; 15, reflector group 2; 16, reflector 3; 17, polarization beam splitter; 18, focusing mirror 1; 19, focusing mirror 2; 110, through hole; 111, polarizer; 112, circuit board; 113, through hole Electrical hole; 114, circuit connection assembly; 115, fiber optic holder; 116, fiber optic fixing nut; 117, fiber optic; 2, outer box; 3, water cooling heat sink; 4, main control circuit board; 5, bundled fiber; 6, circulating cooling pipe; 7, water inlet; 8, water outlet; 9, water cooling connector; 10, water cooling connector nut; 20, thermal pad; 21, avoidance groove; 22, connector base; 23, soft rubber cap; 24, fixing nut; 25, ear plate; 26, adjustment hole DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] It is known that the existing technology usually relies on a single high-power laser diode for bundling, and then outputs it through a bundled optical fiber. It is limited by the limited power of the diode. When the optical fiber is required to meet ultra-high power requirements, the existing technology bundles more laser diodes to increase the power of the bundled optical fiber in order to increase the power. Such a design module is large in size, and the equipment installation space is limited, resulting in the inability to increase the power of a single unit. At the same time, the large fiber core at the beam output end leads to low imaging resolution, energy dispersion, increased interference risk, limited optical adaptability and other problems. It has obvious disadvantages in high-end circuit board manufacturing and solder mask applications. At the same time, the existing fiber laser module control is overall control, that is, the application adaptability of opening and closing is poor.

[0030] Furthermore, since the light emitted by the laser diodes must be converged by the focusing lens, and the light emitted by the laser diodes is parallel before reaching the focusing lens, increasing the number of lasers will cause the overall size of the light beam entering the focusing lens to increase, making it difficult for the focusing lens to efficiently converge all the light beams into the optical fiber core area, thereby reducing the coupling efficiency.

[0031] Please refer to Figure 1-10 ;

[0032] Therefore, the present invention discloses a fiber laser coupling module, which aims to reduce the volume while increasing the power of a single optical fiber, and further increase the power of the bundled optical fiber 5 after the bundle is combined without increasing the number of optical fibers involved in the bundle combination. Specifically, it includes an outer box 2 and a water-cooled heat sink 3 located in the outer box 2. A main control circuit board 4 and several spatial laser coupling modules 1 are installed on the water-cooled heat sink 3. In this embodiment, the water-cooled heat sink 3 is fixedly connected to the outer box 2 by fixing screws, and the main control circuit board 4 and several spatial laser coupling modules 1 are installed on both sides of the water-cooled heat sink 3 to further improve the space utilization efficiency and the heat dissipation efficiency of the water-cooled heat sink 3. Several spatial laser coupling modules 1 are electrically connected to the main control circuit board 4, and the optical fibers 117 of several spatial laser coupling modules 1 are bundled into a bundled optical fiber 5, and the bundled optical fiber 5 passes through the outer box 2;

[0033] The spatial laser coupling module 1 includes a main body 11 and a beam module 12 and a beam module 2 13 arranged opposite to each other on both sides of the main body 11. The beam module 12 and the beam module 2 13 both emit light beams, and the light beams emitted by the beam module 12 and the beam module 2 13 are emitted in opposite directions; a reflector group 1 14 is provided on the light path of the corresponding beam module 12, a reflector group 2 15 is provided on the light path of the corresponding beam module 2 13, and a polarizer 111 and a reflector 3 16 are provided in sequence on the light path reflected by the corresponding reflector group 14. A polarizer 111 is provided between the reflector group 14 and the reflector 3 16. After the reflector group 14 adjusts the direction of the multiple laser beams emitted by the beam module 12, the polarization state is uniformly controlled by the polarizer 111; the light corresponding to the reflector 3 16 A polarization beam splitter 17 is provided on the beam path, and the reflected light beam of the reflector three 16 and the reflected light beam of the reflector group two 15 overlap on the polarization beam splitter 17. A focusing mirror 18 is also provided in the main body 11. The overlapping light on the polarization beam splitter 17 passes through the focusing mirror 18 to form a focus and enter the optical fiber 117; specifically, the light emitted from the beam module 1 12 passes through the reflector group 1 14, the reflector three 16, and the polarization beam splitter 17 and then reaches the focusing mirror 1 18 as the first light path, and the light emitted from the beam module 2 passes through the reflector group 2 15 and the polarization beam splitter 17 and then reaches the focusing mirror 1 18 as the second light path. The sizes of the light beams of the first light path and the second light path can be the same or different. The first light path and the second light path overlap on the light path from the polarization beam splitter 17 to the focusing mirror 1 18 to form a bundled optical fiber 5.

[0034] More specifically, the beam module 12 and the beam module 2 13 respectively emit multiple laser beams from both sides of the main body 11 in opposite directions. The beam emitted by the beam module 12 propagates along the first optical path, first adjusts the direction by the reflector group 14, and then is further reflected by the reflector 3 16 to the polarization beam splitter 17; the beam emitted by the beam module 2 13 propagates along the second optical path, and directly reaches the polarization beam splitter 17 after being adjusted in direction by the reflector group 2 15; at the polarization beam splitter 17, the reflected beams of the first optical path and the second optical path overlap to form an overlapping beam; this overlapping beam then passes through the focusing mirror 1 18 and is converged to the output target to form a focus Enter the high-power optical fiber 117; It is worth noting that the beam sizes of the first optical path and the second optical path can be the same or different, but they are overlapped on the optical path from the polarization beam splitter 17 to the focusing mirror 18 to ensure efficient coupling of the beams; the spatial laser coupling module 1 effectively solves the problems of the traditional module due to the increase in the number of laser diodes 121 to form a bundled optical fiber output, which ultimately leads to low imaging resolution, energy dispersion, increased interference risk, and limited optical adaptability. The two groups of light beams are superimposed at the polarization beam splitter 17, which reduces The overall beam size entering the focusing mirror 18 enables the focusing mirror 18 to more efficiently converge the light beam into a focus and enter the optical fiber 117, thereby improving the coupling efficiency. At the same time, the dual-light path design avoids the linear growth of the module length when the number of laser diodes 121 increases, shortens the total length of the light path, makes the module more compact, reduces space occupation, and adapts to more usage scenarios. In addition, it reduces the need for multiple focusing, simplifies the optical structure, reduces energy loss and system complexity, and further improves the system performance and stability. In addition, the main control circuit board 4 in the outer box 2 and the several spatial laser coupling modules 1 are connected by the water-cooled heat sink 3. Heat dissipation is beneficial to heat dissipation and prevents deformation of the optical lens in the space laser coupling module 1. The space laser coupling module 1 is electrically connected to the main control circuit board 4. The main control circuit board 4 can control the opening and closing of the space laser coupling module 1 to realize the overall opening and closing of all space laser coupling modules 1 or the opening and closing of each one, thereby improving the user experience and adapting to more usage scenarios. The space laser coupling module 1 replaces the traditional optical fiber formed by a single laser diode, thereby increasing the power of the optical fiber 117, and then increasing the power of the bundled optical fiber 5 without increasing the number of optical fibers 117, thereby meeting the scenarios with high power usage requirements.

[0035] In this embodiment, the beam module 12 and the beam module 2 13 are separated on the two side walls inside the main body 11. The structures of the beam module 12 and the beam module 2 13 are the same. This embodiment takes the structure of the beam module 12 as an example. Specifically, the beam module 12 includes a plurality of laser diodes 121 and a main body split block 122. The main body split block 122 is fixed to the bottom of the main body 11 by a light-transmitting fixing screw. In this embodiment, the number of laser diodes 121 is 5, and the 5 laser diodes 121 are arranged at intervals. The main body split block 122 is provided with a plurality of mounting holes 123, and the number of mounting holes 123 is the same as the number of laser diodes 121. The laser diode 121 is provided with a pressure ring 124, and the outer wall of the pressure ring 124 abuts against the wall of the mounting hole 123. The laser diode 121 is provided with a focusing lens 2 19. The light beam emitted by the laser diode 121 passes through the focusing lens 2 19 and reaches the reflector group 14.

[0036] More specifically, during assembly, the laser diode 121 is first sleeved on the inner wall of the pressure ring 124, and then the pressure ring 124 is squeezed so that the pressure ring 124 can be placed in the hole wall of the mounting hole 123, so that the outer wall of the pressure ring 124 abuts against the hole wall of the mounting hole 123, thereby fixing the laser diode 121 in the mounting hole 123. It is worth noting that a through hole 110 is provided on the main body block 122, and the through hole 110 is connected to the mounting hole 123, so that the operator can easily place the pressure ring 124 on the hole wall of the mounting hole 123, and then fix the main body block 122 to the bottom of the main body 11 by fixing screws; by adopting the structural design of the main body block 122 and the pressure ring 124 in the beam module 1 12 and the beam module 2 13, combined with the focusing lens 2 19, the installation of the laser diode 121 is effectively improved. Precision and beam quality, the mounting hole 123 on the main body block 122 cooperates with the pressure ring 124 to ensure the precise fixation and optical axis alignment of the laser diode 121, and the abutment design between the outer wall of the pressure ring 124 and the wall of the mounting hole 123 enhances mechanical stability and prevents beam deviation caused by vibration or thermal expansion. At the same time, the design of the through hole 110 facilitates the installation operation of the pressure ring 124 and simplifies the assembly process. The focusing mirror 19 collimates or focuses the divergent light beam emitted by the laser diode 121, optimizes the initial quality of the light beam, and provides a high-precision optical path foundation for the subsequent transmission through the reflector group 14 and the overlap of the polarization beam splitter 17, which not only improves the coupling efficiency of the light beam, but also reduces the volume of the overall module through a compact modular design, thereby enhancing the adaptability and stability of the system in various application scenarios.

[0037] Furthermore, the reflector group 14 includes a plurality of reflectors 1, and the light reflected from the plurality of reflectors 1 passes through the polarizer 111 and reaches the reflector 3 16.

[0038] In addition, in order to facilitate the management of whether the laser diode 121 is emitting light, a circuit board 112 is provided on the side of the main body block 122 away from the reflector group 14, and the circuit board 112 is electrically connected to the laser diode 121. The main body 11 is provided with a power-through hole 113, and the main body 11 is provided with a circuit connection component 114. The circuit connection component 114 is electrically connected to the circuit board 112 through the power-through hole 113, and the circuit board 112 is electrically connected to the main control circuit board 4 through the circuit connection component 114. Specifically, during the assembly process, the circuit board 112 is first installed on the side of the main body block 122 away from the reflector group 14, and reliable electrical connection is ensured between the circuit board 112 and the electrodes of the laser diode 121 by welding or plugging. Subsequently, the circuit connection component 11 is connected through the preset power-through hole 113 on the main body 11. 4 is connected to the circuit board 112 through the power-through hole 113, and then the circuit connection component 114 is electrically connected to the main control circuit board 4 to complete the access of the external power supply or control signal. In actual operation, the external power supply supplies power to the circuit board 112 through the main control circuit board 4 and the circuit connection component 114. The circuit board 112 adjusts the light-emitting state of the laser diode 121 according to the control signal, and can realize the switch control, power adjustment and other functions of a single or multiple laser diodes 121, which not only enhances the operation stability and response speed of the laser diode 121, but also facilitates the management of the independent or coordinated working state of each laser diode 121, reduces the system failure rate, and controls and adjusts the spatial laser coupling module 1 through the main control circuit board 4, facilitates the adjustment of the power of the bundled optical fiber 5, and improves the practical use scenario of the present application.

[0039] In this embodiment, in order to facilitate the output of the optical fiber 117 of the spatial laser coupling module 1, a fiber holder 115 and a fiber fixing nut 116 are provided on the light path corresponding to the focusing mirror 18, and the main body 11 is provided with a light hole, and the light converged by the focusing mirror 18 reaches the fiber holder 115 through the light hole, and the fiber fixing nut 116 is used to fix the optical fiber 117 on the fiber holder 115; specifically, during the assembly process, the fiber holder 115 is first installed on the light path corresponding to the focusing mirror 18 to ensure that the optical path of the fiber holder 115 and the focusing mirror 18 are accurately aligned, and then the fiber fixing nut 116 is tightened to allow the optical fiber 117 to pass through the fiber holder 115 to ensure that the end face of the optical fiber is aligned with the focal point of the light beam converged by the focusing mirror 18, and the light beam is directly transmitted to the end face of the optical fiber of the fiber holder 115 through the light hole, thereby realizing efficient coupling of the optical signal.

[0040] In this embodiment, a circulating cooling pipe 6 is provided in the hollow space inside the water-cooled heat sink 3, and the circulating cooling pipe 6 is provided with a water inlet 7 and a water outlet 8. The water inlet 7 and the water outlet 8 are both provided with a water cooling joint 9 and a water cooling joint nut 10. The outer box 2 is provided with a water cooling hole, the water cooling joint 9 passes through the water cooling hole, and the water cooling joint 9 is connected to the water inlet 7 or the water outlet 8. The water cooling joint nut 10 is used to open or close the water cooling joint 9; a thermal pad 20 is provided between the main control circuit board 4 and the water-cooled heat sink 3.

[0041] During the operation of the fiber laser coupling module, the circulating cooling pipe 6 arranged in the hollow inside the water-cooled heat sink 3 introduces coolant through the water inlet 7. The coolant flows in the circulating cooling pipe 6, absorbs the heat on the water-cooled heat sink 3, and is then discharged through the water outlet 8. The water inlet 7 and the water outlet 8 are both equipped with a water-cooling joint 9 and a water-cooling joint nut 10. The water-cooling joint 9 is connected to the external cooling system through the water-cooling hole on the outer box 2. The water-cooling joint nut 10 can control the opening or closing of the water-cooling joint 9 to adjust the flow of the coolant. The heat generated by the main control circuit board 4 is efficiently transferred to the water-cooled heat sink 3 through the thermal pad 20, and then taken away by the coolant in the circulating cooling pipe 6, thereby achieving efficient heat dissipation of the equipment.

[0042] In this embodiment, the water-cooled heat sink 3 is provided with an avoidance groove 21, which is used to avoid the connection of several optical fibers 117. A fiber hole is provided on the side of the outer box 2 close to the avoidance groove 21. The outer box 2 is provided with a connector base 22, a soft rubber cap 23 and a fixing nut 24. The connector base 22 is fixedly connected to the outer box 2, the soft rubber cap 23 is sleeved on the inner wall of the connector base 22, the fixing nut 24 is threadedly connected to the connector base 22, and the bundled optical fiber 5 passes through the connector base 22 and the soft rubber cap 23.

[0043] In this embodiment, an ear plate 25 is provided on one side of the outer box 2 close to the avoidance groove 21. There are two ear plates 25, and the two ear plates 25 are located on both sides of the outer box 2. One end of the ear plate 25 is connected to the outer box 2, and the other end of the ear plate 25 is provided with a plurality of adjustment holes 26.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fiber laser coupling module, characterized in that: The invention comprises an outer box (2) and a water-cooled heat sink (3) located in the outer box (2); a main control circuit board (4) and a plurality of space laser coupling modules (1) are installed on the water-cooled heat sink (3); the plurality of space laser coupling modules (1) are electrically connected to the main control circuit board (4); the optical fibers (117) of the plurality of space laser coupling modules (1) are bundled into a bundled optical fiber (5); the bundled optical fiber (5) passes through the outer box (2); the space laser coupling module (1) comprises a main body (11) and a beam module 1 (12) and a beam module 2 (13) arranged opposite to each other on both sides of the main body (11); a counter-axis is provided on the light path corresponding to the beam module 1 (12). A reflector group 1 (14) is provided on the light path corresponding to the light beam module 2 (13), a reflector group 2 (15) is provided on the light path corresponding to the light beam module 2 (13), a polarizer (111) and a reflector 3 (16) are provided in sequence on the light path corresponding to the reflector group 1 (14), a polarizing beam splitter (17) is provided on the light beam path corresponding to the reflector 3 (16), the reflected light beam of the reflector 3 (16) and the reflected light beam of the reflector group 2 (15) are overlapped on the polarizing beam splitter (17), a focusing mirror 1 (18) is further provided in the main body (11), and the overlapped light beam on the polarizing beam splitter (17) passes through the focusing mirror 1 (18) to form a focus and enter the optical fiber (117).

2. The fiber laser coupling module according to claim 1, characterized in that: The beam module (12) comprises a plurality of laser diodes (121) and a main body block (122). The main body block (122) is provided with a plurality of mounting holes (123). The laser diode (121) is sleeved with a pressure ring (124). The outer wall of the pressure ring (124) abuts against the hole wall of the mounting hole (123). The laser diode (121) is provided with a focusing mirror (19). The light beam emitted by the laser diode (121) passes through the focusing mirror (19) and reaches the reflecting mirror group (14).

3. The fiber laser coupling module according to claim 1, characterized in that: The reflector group one (14) includes a plurality of reflector ones, and the light reflected from the plurality of reflector ones all passes through the polarizing plate (111) and reaches the reflector three (16).

4. The fiber laser coupling module according to claim 2, characterized in that: A circuit board (112) is provided on a side of the main body block (122) facing away from the reflector group 1 (14), the circuit board (112) is electrically connected to the laser diode, the main body (11) is provided with a power-through hole (113), the main body (11) is provided with a circuit connection component (114), the circuit connection component (114) is electrically connected to the circuit board (112) through the power-through hole (113), and the circuit board (112) is electrically connected to the main control circuit board (4) through the circuit connection component (114).

5. The fiber laser coupling module according to claim 1, characterized in that: An optical fiber holder (115) and an optical fiber fixing nut (116) are provided on the light path corresponding to the focusing mirror (18). The main body (11) is provided with a light through hole. The light converged by the focusing mirror (18) reaches the optical fiber holder (115) through the light through hole. The optical fiber fixing nut (116) is used to fix the optical fiber (117) on the optical fiber holder (115).

6. The fiber laser coupling module according to claim 1, characterized in that: A circulating cooling pipe (6) is hollowly arranged in the water-cooled heat sink (3), and the circulating cooling pipe (6) is provided with a water inlet (7) and a water outlet (8). The water inlet (7) and the water outlet (8) are both provided with a water cooling joint (9) and a water cooling joint nut (10). The outer box (2) is provided with a water cooling hole, and the water cooling joint (9) passes through the water cooling hole, and the water cooling joint (9) is connected to the water inlet (7) or the water outlet (8), and the water cooling joint nut (10) is used to open or close the water cooling joint (9); a thermal pad (20) is provided between the main control circuit board (4) and the water-cooled heat sink (3).

7. The fiber laser coupling module according to claim 1, characterized in that: The water-cooled heat sink (3) is provided with an avoidance groove (21), and the avoidance groove (21) is used to avoid the connection of a plurality of optical fibers (117). The outer box (2) is provided with a fiber hole on a side close to the avoidance groove (21). The outer box (2) is provided with a connector base (22), a soft rubber cap (23) and a fixing nut (24). The connector base (22) is fixedly connected to the outer box (2), the soft rubber sleeve is sleeved on the inner wall of the connector base (22), the fixing nut (24) is threadedly connected to the connector base (22), and the bundled optical fiber (5) passes through the connector base (22) and the soft rubber cap (23).

8. The fiber laser coupling module according to claim 7, characterized in that: A lug plate (25) is provided on one side of the outer box (2) close to the avoidance groove (21), one end of the lug plate (25) is connected to the outer box (2), and the other end of the lug plate (25) is provided with a plurality of adjustment holes (26).

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