A fiber laser

Abstract

This application discloses a fiber laser, including a housing, a pump source, a reflector, a beam combiner, a beam combiner mirror, and a fiber optic assembly. The housing has a receiving cavity and a clearance slot, with the clearance slot communicating with the receiving cavity. The pump source is fixedly connected to the housing. The reflector is located at the output port of the pump source, and the reflector forms a preset angle with the laser emitted from the pump source. The beam combiner is fixedly connected to the housing. The beam combiner mirror is mounted on the beam combiner, and is arranged parallel to the reflector. The pump source, reflector, beam combiner mirror, and beam combiner are all located within the receiving cavity. The fiber optic assembly passes through the clearance slot and is used to transmit the laser light after passing through the beam combiner mirror. Because the pump source, reflector, beam combiner, and beam combiner mirror are concentrated within the receiving cavity of the housing, the components can be arranged more compactly, reducing the overall size of the fiber laser.

Description

Technical Field

[0001] This application relates to the field of lasers, and more specifically, to a fiber laser. Background Technology

[0002] A laser is a device that generates light by amplifying it based on stimulated emission, and it has important applications in many fields. The pump source of a laser emits a beam of light, which passes through a working medium and resonates with a reflecting mirror to form a laser beam that meets the required specifications. Existing lasers have complex internal structures and occupy a large space, making them difficult to meet the market demand for miniaturization; therefore, improvements are needed. Utility Model Content

[0003] The purpose of this application is to provide a fiber laser to solve the problems of existing lasers having complex structures, large footprints, and difficulty in miniaturization.

[0004] To solve the above problems, this application adopts the following technical solution:

[0005] This application provides a fiber laser, comprising:

[0006] The housing has a receiving cavity and a clearance groove, wherein the clearance groove is in communication with the receiving cavity;

[0007] The pump source is fixedly connected to the housing.

[0008] A reflector is located at the light outlet of the pump source, and the reflector forms a preset angle with the laser emitted from the pump source;

[0009] The light-combining base is fixedly connected to the housing;

[0010] A beam combiner is mounted on the beam combiner base. The beam combiner is arranged parallel to the reflector. The pump source, the reflector, the beam combiner, and the beam combiner base are all located within the receiving cavity.

[0011] An optical fiber assembly is inserted into the clearance slot, and the optical fiber assembly is used to transmit laser light after passing through the beam combiner.

[0012] Because the pump source, reflector, beam combiner, and beam combiner are all housed within the housing cavity, the components can be arranged more compactly, reducing the overall size of the fiber laser. The reflector forms a preset angle with the pump source output port, and the beam combiner is set parallel to the reflector, resulting in a relatively simple optical path and improving the energy conversion efficiency and output beam quality of the fiber laser.

[0013] Furthermore, the light combining base includes a base body and a mounting platform. The base body is fixed to the housing along a horizontal plane, and the base body is fixed to the mounting platform along a vertical plane. The mounting platform is used to mount the light combining mirror.

[0014] By fixing the base to the horizontal plane of the housing, the beam combiner can maintain a precise position, thus ensuring high precision of the laser beam path. Simultaneously, it allows the beam combiner to be installed as a relatively independent component, enabling fine-tuning via a mounting platform to achieve precise parallelism with the reflector.

[0015] Furthermore, the mounting platform is provided with an inclined platform that protrudes from the base body, providing convenience when installing the beam combiner and improving alignment accuracy.

[0016] Furthermore, the light-combining base includes a fixing member, and both the base body and the mounting platform are provided with connecting holes, through which the fixing member passes.

[0017] By using fasteners to pass through pre-set connection holes, the base and mounting platform are firmly connected into a whole, ensuring the robust stability of the optical combining base structure and the precise maintenance of the optical element position, while also improving assembly convenience.

[0018] Furthermore, the mounting platform is provided with a clearance groove, which is coaxial with the connecting hole and is used to avoid the fixing component.

[0019] The clearance groove provides the necessary operating space, preventing collisions or interference with the mounting platform when the fastener passes through the connection hole and is tightened, thus improving installation accuracy.

[0020] Furthermore, the housing includes a cover plate and an outer shell, the outer shell is provided with the receiving cavity and the clearance groove, the cover plate covers the receiving cavity, and the reflector and the light combining seat are both fixedly connected to the outer shell.

[0021] The outer shell forms a receiving cavity and a clearance groove to support the pump source, reflector and beam combiner. The cover plate provides sealing and protection, which facilitates separate processing and assembly, simplifies the assembly process, enhances the stability and protection of the internal environment of the fiber laser, and improves the reliability and stability of the fiber laser.

[0022] Furthermore, the pump source is fixed on the cover plate, which more effectively conducts the heat generated by the pump source to the cover plate, reduces the operating temperature of the pump source, and improves heat dissipation efficiency.

[0023] Furthermore, the cover plate is provided with a mounting platform, which protrudes from the bottom surface of the cover plate and is used to mount the pump source.

[0024] By setting up an installation platform, the pump source can be firmly and accurately fixed in the predetermined position, improving assembly efficiency and installation accuracy.

[0025] Furthermore, the fiber laser includes a cooling fan, which is fixedly connected to the cover plate.

[0026] By incorporating a cooling fan, the airflow inside the housing is accelerated, thereby improving the heat dissipation efficiency of the fiber laser.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Because the pump source, reflector, beam combiner, and beam combiner are concentrated in the housing cavity, the components can be arranged more compactly, reducing the overall size of the fiber laser.

[0029] 2. The reflector and the pump source output port form a preset angle, and the beam combiner and the reflector are set in parallel. The optical path is relatively simple, which improves the energy conversion efficiency and output beam quality of the fiber laser. At the same time, it can further reduce the space occupied, enabling the miniaturization of the fiber laser. Attached Figure Description

[0030] Figure 1 An exploded view of a fiber laser provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a fiber laser provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a cover plate provided in an embodiment of this application;

[0033] Figure 4 This application provides a schematic diagram of the structure of a light-combining seat.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Housing; 1A. Receiving cavity; 1B. Clearance groove; 11. Cover plate; 111. Mounting platform; 12. Outer shell;

[0036] 2. Pump source; 3. Reflector;

[0037] 4. Light-reflecting base; 4A. Connecting hole; 41. Base body; 42. Mounting platform; 421. Inclined platform; 422. Clearance groove; 43. Fixing component;

[0038] 5. Optical combiner; 6. Fiber optic assembly; 7. Cooling fan. Detailed Implementation

[0039] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0041] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0042] A laser is a device that generates light by amplifying stimulated emission, and it has important applications in many fields. The pump source of a laser emits a beam of light, which passes through a working medium and resonates with a reflecting mirror to form a laser beam. However, lasers generate heat during operation. Current methods often use ventilation holes on the laser surface for heat dissipation. When heat is continuously generated, it is difficult to dissipate and remains inside the laser housing, leading to heat dissipation difficulties. Furthermore, existing lasers have complex internal structures and occupy a large space, making them unsuitable for the miniaturization demands of the market.

[0043] Figure 1 This is an exploded view of a fiber laser provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of a fiber laser provided in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of a cover plate provided in an embodiment of this application. Figure 4 This application provides a schematic diagram of the structure of a light-combining seat.

[0044] In view of this, such as Figures 1 to 4 As shown in the figure, this application provides a fiber laser, including a housing 1, a pump source 2, a reflector 3, a beam combiner 4, a beam combiner 5, and a fiber assembly 6. The housing 1 has a receiving cavity 1A and a clearance groove 1B, and the clearance groove 1B is connected to the receiving cavity 1A. The pump source 2 is fixedly connected to the housing 1. The reflector 3 is located at the light outlet of the pump source 2, and the reflector 3 and the laser emitted from the pump source 2 form a preset angle. The beam combiner 4 is fixedly connected to the housing 1. The beam combiner 5 is installed on the beam combiner 4 and is arranged parallel to the reflector 3. The pump source 2, the reflector 3, the beam combiner 5, and the beam combiner 4 are all located in the receiving cavity 1A. The fiber assembly 6 passes through the clearance groove 1B and is used to transmit the laser after passing through the beam combiner 5.

[0045] Specifically, to address the problems of complex internal structures and large space requirements of existing fiber lasers, which make them difficult to meet the miniaturization market demands, this application provides a fiber laser. The housing 1 forms a cavity 1A for accommodating core optical and electronic components. A clearance groove 1B is also formed on the side wall at one end of the housing 1, communicating with the cavity 1A to provide a channel for the subsequently extending fiber optic assembly 6. The pump source 2 is fixedly connected to the internal wall of the housing 1 by screws or adhesive, ensuring stable placement within the cavity 1A. When the pump source 2 is operating, the pump beam emitted from its output port is emitted towards the reflector 3. The reflector 3 is placed near the output port of the pump source 2, and its installation position and angle are precisely adjusted so that its reflecting surface forms a preset angle (e.g., 45°) with the axis of the laser beam emitted from the pump source 2, thus reflecting the laser in a specific direction. The beam combiner 4 is fixedly connected to the interior of the housing 1, also located within the cavity 1A. The beam combiner 5 has a special coating that couples the beam emitted from the pump source 2 with the laser generated by the working medium. The beam combiner 5 is mounted and fixed on the beam combiner base 4. After adjustment, the surface of the beam combiner 5 is parallel to the reflecting surface of the reflector 3. The beam emitted from the pump source 2, after being reflected by the reflector 3, is directed towards the beam combiner 5. The laser generated within the laser resonant cavity also passes through the beam combiner 5. Part of the fiber assembly 6 passes through the clearance slot 1B on the housing 1, leading from inside the fiber laser to the outside. The clearance slot 1B design allows the fiber assembly 6 to be smoothly led out. For example, with a preset angle of 45°, the reflector 3 and the laser emitted from the pump source 2 form a 45° angle, and the beam combiner 5 is parallel to the reflector 3.

[0046] It should be noted that because the pump source 2, reflector 3, beam combiner 4, and beam combiner 5 are concentrated in the housing cavity 1A of the housing 1, the components can be arranged more compactly, reducing the overall size of the fiber laser. The reflector forms a preset angle with the pump source output port, and the beam combiner 5 is set parallel to the reflector 3, resulting in a relatively simple optical path, improving the energy conversion efficiency and output beam quality of the fiber laser. At the same time, it can further reduce the space occupied, enabling the miniaturization of the fiber laser.

[0047] In some embodiments, the light combining base 4 includes a base body 41 and a mounting platform 42. The base body 41 is fixed to the housing 1 along the horizontal plane, and the base body 41 is fixed to the mounting platform 42 along the vertical plane. The mounting platform 42 is used to mount the light combining mirror 5.

[0048] Specifically, the beam combining base 4 includes a base body 41 and a mounting platform 42. The base body 41 is connected to the housing 1 of the laser and fixed along the horizontal plane. It should be noted that "fixed along the horizontal plane" means that the connection surface between the base body 41 and the housing 1 is approximately on the horizontal plane. For example, a threaded hole is machined on the base body 41, and then screws are used to tighten and fix it to the preset mounting position on the housing 1. This prevents the beam combining base 4 from easily shifting horizontally within the housing 1, providing a stable foundation for the subsequent mounting platform 42 and beam combining mirror 5. The mounting platform 42 supports and fixes the beam combining mirror 5. The base body 41 and the mounting platform 42 are fixed along the vertical plane. This means that the connection surface of the mounting platform 42 relative to the base body 41 is approximately in the vertical plane, ensuring the stability and precise position of the mounting platform 42 in the vertical direction. In this embodiment, the mounting platform 42 is securely fixed to the base 41 from the side by screws, allowing the mounting platform 42 to stand stably on the base 41, providing a precise and stable mounting surface for the beam combiner 5. The beam combiner 5 is mounted on the top of the mounting platform 42. In particular, the mounting platform 42 is provided with a ramp 421, which protrudes from the base 41, facilitating the installation of the beam combiner 5 and improving alignment accuracy.

[0049] By fixing the base 41 to the horizontal surface of the housing 1, the beam combiner 5 can maintain a precise position, thus ensuring the high precision of the laser beam path. At the same time, the beam combiner 5 can be installed as a relatively independent component, and fine-tuning can be achieved through the mounting platform 42 to achieve precise parallelism with the reflector 3.

[0050] In some embodiments, the light-combining base 4 includes a fixing member 43, and both the base body 41 and the mounting platform 42 are provided with connecting holes 4A, through which the fixing member 43 passes. Specifically, at least one connecting hole 4A is pre-machined on both the base body 41 and the mounting platform 42 to ensure that the base body 41 and the mounting platform 42 can be assembled at the correct relative angle and distance. The shape of the connecting hole 4A is generally circular, and its diameter is adapted to the diameter of the fixing member 43 to facilitate assembly and thus ensure a tight connection. For example, the fixing member 43 is a screw, the connecting hole 4A of the base body 41 is a threaded hole, and the connecting hole 4A of the mounting platform 42 is a through hole. The screw passes through the connecting hole 4A to tighten the screw, so that its head contacts the surface of the base body 41, and the threaded portion firmly presses the mounting platform 42 onto the base body 41. In particular, the mounting platform 42 is provided with a clearance groove 422, which is coaxial with the connecting hole 4A and is used to avoid the fixing member 43. For example, when there are 3 connecting holes 4A, the clearance groove 422 is coaxially arranged with one of the connecting holes 4A. The clearance groove 422 provides the necessary operating space. When the fastener 43 passes through the connecting hole 4A and is tightened, it avoids collision or interference with the mounting table 42, thereby improving the accuracy of installation.

[0051] By passing the fastener 43 through the pre-set connection hole 4A, the base 41 and the mounting platform 42 are firmly connected into a whole, ensuring the stability of the optical combining base 4 and the precise maintenance of the position of the optical components, and also improving the ease of assembly.

[0052] In some embodiments, the housing 1 includes a cover plate 11 and an outer shell 12. The outer shell 12 is provided with a receiving cavity 1A and a clearance groove 1B. The cover plate 11 covers the receiving cavity 1A. The reflector 3 and the light combining seat 4 are both fixedly connected to the outer shell 12.

[0053] Specifically, the outer shell 12 is the main body of the housing 1. The outer shell 12 has a hollow structure of a certain depth, forming an internal cavity 1A for accommodating the core optical and electronic components of the laser. A clearance groove 1B is formed on the side wall of one end of the outer shell 12 according to the path requirements of the fiber optic assembly. A cover plate 11 is used to close the cavity 1A, and its shape matches the opening of the outer shell 12. When the cover plate 11 is installed in place, it tightly covers the opening of the outer shell 12, thereby sealing the cavity 1A. The cover plate 11 is connected to the outer shell 12 by screws. The reflector 3 is precisely positioned within the resonant cavity, and its positional stability directly affects the quality of the laser output. The reflector 3 is directly fixed to the outer shell 12, and the beam combiner 4 is fixedly connected to the outer shell 12 through its base 41. For example, mounting holes are provided on the inner wall of the outer shell 12, and the support of the reflector 3 and the base 41 of the beam combiner 4 are fixed to the outer shell 12 by screws. Specifically, the pump source 2 is fixed to the cover plate 11, thereby more effectively transferring the heat generated by the pump source 2 to the cover plate 11, reducing the operating temperature of the pump source 2, and improving heat dissipation efficiency. It should be noted that multiple heat sinks can be installed on the cover plate 11 to further improve heat dissipation efficiency. The outer shell 12 forms a receiving cavity 1A and a clearance groove 1B, supporting the pump source 2, the reflector 3, and the beam combiner 4. The cover plate 11 provides enclosure and protection, facilitating separate processing, manufacturing, and assembly, simplifying the assembly process, enhancing the stability and protection of the internal environment of the fiber laser, and improving the reliability and stability of the fiber laser.

[0054] In some embodiments, the cover plate 11 is provided with a mounting platform 111, which protrudes from the bottom surface of the cover plate 11 and is used to mount the pump source 2. Specifically, the mounting platform 111 is not flush with the bottom surface of the cover plate 11 (i.e., the side facing the receiving cavity 1A), but protrudes from the bottom surface. For example, the mounting platform 111 is a stepped protrusion that rises vertically upward from the bottom surface of the cover plate 11. The mounting platform 111 can be an integral structure, integrally formed with the cover plate 11. The shape and size of the mounting platform 111 are adapted to the size and installation requirements of the pump source 2. The pump source 2 is fixed to the mounting platform 111 by screws through mounting holes on its bottom that mate with pre-set mounting holes on the top surface of the mounting platform 111. By providing the mounting platform 111, the pump source 2 can be firmly and accurately fixed in a predetermined position, improving assembly efficiency and installation accuracy.

[0055] In some embodiments, the fiber laser includes a cooling fan 7, which is fixedly connected to a cover plate 11. Specifically, in order to further improve the heat dissipation efficiency of the fiber laser and ensure that internal components, especially heat-generating components such as the pump source 2, operate stably within a suitable temperature range, this embodiment adds a cooling fan 7 to the fiber laser and fixes it to the cover plate 11. The cooling fan 7 generates forced airflow to accelerate the dissipation of heat inside the fiber laser.

[0056] For example, mounting holes are pre-machined on the cover plate 11, and the cooling fan 7 also has mounting holes. Screws, studs, or other fasteners are passed through the mounting holes of the cooling fan 7 and screwed into the mounting holes of the cover plate 11, directly fixing the cooling fan 7 to the cover plate 11. At this time, the cooling fan 7 is outside the receiving cavity 1A. By setting the cooling fan 7, the airflow inside the housing is accelerated, improving the heat dissipation efficiency of the fiber laser.

[0057] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed in this application.

Claims

1. A fiber laser, characterized in that, include: The housing has a receiving cavity and a clearance groove, wherein the clearance groove is in communication with the receiving cavity; The pump source is fixedly connected to the housing. A reflector is located at the light outlet of the pump source, and the reflector forms a preset angle with the laser emitted from the pump source; The light-combining base is fixedly connected to the housing; A beam combiner is mounted on the beam combiner base. The beam combiner is arranged parallel to the reflector. The pump source, the reflector, the beam combiner, and the beam combiner base are all located within the receiving cavity. An optical fiber assembly is inserted into the clearance slot, and the optical fiber assembly is used to transmit laser light after passing through the beam combiner.

2. A fiber laser according to claim 1, characterized in that, The beam combining base includes a base body and a mounting platform. The base body is fixed to the housing along a horizontal plane, and the base body is fixed to the mounting platform along a vertical plane. The mounting platform is used to mount the beam combining mirror.

3. A fiber laser according to claim 2, characterized in that, The mounting platform is provided with an inclined platform that protrudes from the base body.

4. A fiber laser according to claim 2, characterized in that, The light-combining base includes a fixing member, and both the base body and the mounting platform are provided with connecting holes, through which the fixing member passes.

5. A fiber laser according to claim 4, characterized in that, The mounting platform is provided with a clearance groove, which is coaxial with the connecting hole and is used to avoid the fixing component.

6. A fiber laser according to claim 1, characterized in that, The housing includes a cover plate and an outer shell. The outer shell is provided with the receiving cavity and the clearance groove. The cover plate covers the receiving cavity. The reflector and the light combining seat are both fixedly connected to the outer shell.

7. A fiber laser according to claim 6, characterized in that, The pump source is fixed on the cover plate.

8. A fiber laser according to claim 7, characterized in that, The cover plate is provided with a mounting platform, which protrudes from the bottom surface of the cover plate and is used to mount the pump source.

9. A fiber laser according to claim 6, characterized in that, The fiber laser includes a cooling fan, which is fixedly connected to the cover plate.

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