Fiber laser

Abstract

The utility model provides an optical fiber laser, relates to the technical field of laser equipment, and is designed for solving the problem that optical devices in the existing optical fiber laser adopt a flat plate horizontal layout mode, so that the overall size is relatively large due to loose layout. The optical fiber laser comprises a pumping source, a connecting optical fiber, an optical assembly, a gain optical fiber and a heat dissipation body, the heat dissipation body comprises a top heat dissipation disc and a heat dissipation side wall arranged around the top heat dissipation disc, the top heat dissipation disc and the heat dissipation side wall jointly form a containing cavity, and the pumping source is arranged in the containing cavity; the optical assembly is arranged on the outer surface of the heat dissipation side wall; the connecting optical fiber is coiled on the outer surface of the heat dissipation side wall, one end of the connecting optical fiber is connected with the pumping source, and the other end of the connecting optical fiber is connected with the optical assembly; the gain optical fiber is arranged on the outer surface of the top heat dissipation disc. The optical fiber laser is compact in layout, so that the overall size of the optical fiber laser is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of laser devices, and more specifically, to an optical fiber laser. Background Art

[0002] An optical fiber laser is a device capable of emitting laser light. As an important light source component of laser welding equipment and laser medical equipment, its overall structure has a great impact on the integration of the equipment. The optical devices inside existing optical fiber lasers all adopt a flat horizontal layout method, with a loose layout, resulting in a relatively large overall size and being not conducive to heat dissipation. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an optical fiber laser to solve the technical problem that the optical devices inside the existing optical fiber laser adopt a flat horizontal layout method, resulting in a relatively large overall size due to the loose layout.

[0004] The optical fiber laser provided by the utility model includes a pump source, a connecting optical fiber, an optical component, a gain optical fiber, and a heat dissipation main body. The heat dissipation main body includes a top heat dissipation disc and a heat dissipation side wall surrounding the top heat dissipation disc. The top heat dissipation disc and the heat dissipation side wall jointly form a receiving cavity. Among them, the pump source is arranged in the receiving cavity; the optical component is arranged on the outer surface of the heat dissipation side wall; the connecting optical fiber is wound around the outer surface of the heat dissipation side wall. One end of the connecting optical fiber is connected to the pump source, and the other end of the connecting optical fiber is connected to the optical component; the gain optical fiber is arranged on the outer surface of the top heat dissipation disc.

[0005] Further, the top heat dissipation disc is oval, and the heat dissipation side wall is vertically connected to the top heat dissipation disc.

[0006] Further, the top heat dissipation disc is provided with a limiting groove, and the limiting groove is spirally arranged around the center of the top heat dissipation disc. The gain optical fiber is arranged in the limiting groove.

[0007] Further, the heat dissipation side wall includes a liquid cooling cavity, a liquid inlet, and a liquid outlet. Both the liquid inlet and the liquid outlet are communicated with the liquid cooling cavity. Among them, the optical component is arranged on the outer surface of the liquid cooling cavity, and the connecting optical fiber is wound around the liquid cooling cavity; the liquid inlet is configured to allow the coolant to flow into the liquid cooling cavity, and the liquid outlet is configured to allow the coolant to flow out of the liquid cooling cavity.

[0008] Further, the liquid cooling cavity is provided with a serpentine flow channel. One end of the serpentine flow channel is connected to the liquid inlet, and the other end of the serpentine flow channel is connected to the liquid outlet.

[0009] Furthermore, the fiber laser further includes a housing, and the pump source, the connecting optical fiber, the optical components, the gain fiber, and the heat dissipation body are all located inside the housing, and the liquid inlet and the liquid outlet are exposed from the housing.

[0010] Furthermore, the controller and the driver board of the fiber laser are both arranged inside the housing, and the driver board straddles above the heat dissipation body; the housing is further provided with a start switch, a stop switch, an external interface, and an optical fiber outlet.

[0011] Furthermore, the optical components include a beam combiner, a light stripper, a high reflection grating, a low reflection grating, and an output end cap. Along the laser emission path, the pump source, the connecting optical fiber, the beam combiner, the light stripper, the high reflection grating, the gain fiber, the low reflection grating, and the output end cap are arranged in sequence.

[0012] Furthermore, the heat dissipation body further includes heat dissipation fins connected to the heat dissipation side wall, the heat dissipation fins extend towards the direction of the accommodation cavity, and the pump source is arranged below the heat dissipation fins.

[0013] Furthermore, the material of the heat dissipation side wall is metal; and / or, the gain fiber is a thulium-doped fiber; and / or, the top heat dissipation disc and the heat dissipation side wall are of an integral structure; and / or, the heat dissipation body further includes a pressing plate for fixing the gain fiber to the top heat dissipation disc.

[0014] The beneficial effects brought by the fiber laser of the present utility model are as follows:

[0015] By arranging a heat dissipation body mainly composed of a top heat dissipation disc and a heat dissipation side wall in the fiber laser and arranging the pump source in the accommodation cavity formed by the heat dissipation body, not only can the internal space of the heat dissipation body be fully utilized to accommodate the pump source, but also the pump source can be effectively dissipated by the top heat dissipation disc and the heat dissipation side wall surrounding the pump source; by arranging the optical components and the connecting optical fiber on the outer surface of the heat dissipation side wall, it is not only convenient for assembly and connection, but also the heat generated during the operation of the optical components and the connecting optical fiber can be conducted out by the heat dissipation side wall; by arranging the gain fiber on the outer surface of the top heat dissipation disc, it is not only convenient for dissipating heat from the gain fiber, but also the gain fiber and the heat dissipation body are arranged in the height direction, thereby effectively reducing the occupation of the lateral space.

[0016] It can be seen that by adopting the layout method of placing the pump source in the accommodation cavity of the heat dissipation body, arranging the gain fiber and the heat dissipation body in the height direction, and arranging the optical component and the connecting fiber on the heat dissipation side wall of the heat dissipation body, the fiber laser can effectively reduce the occupation of the lateral space compared with the flat horizontal layout method of each device in the existing fiber laser, with a compact layout, so that the overall size of the fiber laser is reduced. In addition, the above layout method can also achieve sufficient heat dissipation of each device, reduce the heat generated during the operation of each device, and improve the working reliability of the fiber laser. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0018] Figure 1 One of the partial structural schematic diagrams of the fiber laser provided by the embodiment of the present invention;

[0019] Figure 2 is Figure 1 The enlarged partial structural view at A in;

[0020] Figure 3 Another partial structural schematic diagram of the fiber laser provided by the embodiment of the present invention;

[0021] Figure 4 One of the external shape schematic diagrams of the fiber laser provided by the embodiment of the present invention;

[0022] Figure 5 Another partial structural schematic diagram of the fiber laser provided by the embodiment of the present invention;

[0023] Figure 6 Another external shape schematic diagram of the fiber laser provided by the embodiment of the present invention.

[0024] Explanation of the reference numerals:

[0025] 100 - connecting fiber; 200 - optical component; 300 - gain fiber; 400 - heat dissipation body; 500 - housing; 600 - controller; 700 - driver board;

[0026] 410 - top heat dissipation disk; 420 - heat dissipation side wall; 421 - liquid inlet; 422 - liquid outlet; 430 - limiting groove; 440 - pressing plate;

[0027] 510-start switch; 520-stop switch; 530-external interface; 540-optical fiber outlet. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] This embodiment provides a fiber laser, including a pump source, a connecting optical fiber 100 , an optical component 200 , a gain optical fiber 300 and a heat dissipation body 400 .

[0030] Figure 1 This is one of the partial structural diagrams of the fiber laser provided in this embodiment. Figure 1 As shown, the heat dissipation body 400 includes a top heat dissipation plate 410 and a heat dissipation side wall 420 arranged around the top heat dissipation plate 410, and the top heat dissipation plate 410 and the heat dissipation side wall 420 together form a receiving cavity, wherein a pump source (not shown in the figure) is arranged in the receiving cavity; the optical component 200 is arranged on the outer surface of the heat dissipation side wall 420; the connecting optical fiber 100 is coiled on the outer surface of the heat dissipation side wall 420, one end of the connecting optical fiber 100 is connected to the pump source, and the other end of the connecting optical fiber 100 is connected to the optical component 200; the gain optical fiber 300 is arranged on the outer surface of the top heat dissipation plate 410.

[0031] By setting a heat dissipation body 400 mainly composed of a top heat dissipation plate 410 and a heat dissipation side wall 420 in the fiber laser, and setting the pump source in the accommodating cavity formed by the heat dissipation body 400, not only can the internal space of the heat dissipation body 400 be fully utilized to accommodate the pump source, but also the top heat dissipation plate 410 and the heat dissipation side wall 420 surrounding the pump source can be used to effectively dissipate the heat of the pump source; by setting the optical component 200 and the connecting optical fiber 100 on the outer surface of the heat dissipation side wall 420, not only is it convenient to assemble and connect, but also the heat dissipation side wall 420 can be used to guide the heat generated during the operation of the optical component 200 and the connecting optical fiber 100 out; by setting the gain fiber 300 on the outer surface of the top heat dissipation plate 410, not only is it convenient to dissipate the heat of the gain fiber 300, but also the gain fiber 300 and the heat dissipation body 400 are arranged in the height direction, thereby effectively reducing the occupation of the horizontal space.

[0032] It can be seen that by adopting the layout method of placing the pump source in the accommodation cavity of the heat dissipation body 400, arranging the gain fiber 300 and the heat dissipation body 400 in the height direction, and arranging the optical component 200 and the connecting fiber 100 on the heat dissipation side wall 420 of the heat dissipation body 400, the fiber laser can effectively reduce the occupation of the lateral space compared with the flat horizontal layout of each device in the existing fiber laser, with a compact layout, so that the overall size of the fiber laser is reduced. In addition, the above layout method can also achieve sufficient heat dissipation of each device, reduce the heat generated during the operation of each device, and improve the working reliability of the fiber laser.

[0033] Please continue to refer to Figure 1 , in this embodiment, the top heat dissipation disk 410 is oval, and the heat dissipation side wall 420 is vertically connected to the top heat dissipation disk 410. That is to say, the heat dissipation body 400 is generally in the shape of an elliptical cylinder.

[0034] The above structure of the heat dissipation body 400 makes the outer surface of the heat dissipation side wall 420 have a smooth transition, so that when the connecting fiber 100 is wound around the heat dissipation side wall 420, the connecting fiber 100 will not be scratched.

[0035] Figure 2 For Figure 1 the enlarged view of the local structure at A in Figure 1 , and continue to refer to Figure 2 , in this embodiment, the top heat dissipation disk 410 is provided with a limiting groove 430, where the limiting groove 430 is arranged in a spiral around the center of the top heat dissipation disk 410, and the gain fiber 300 is arranged in the limiting groove 430.

[0036] The setting of the above limiting groove 430 not only realizes the accommodation of the gain fiber 300 on the top heat dissipation disk 410, but also can play a certain horizontal limiting role on the gain fiber 300 to prevent the gain fiber 300 from shifting in the horizontal direction.

[0037] Figure 3 This is the second schematic diagram of the local structure of the fiber laser provided in this embodiment. As Figure 3 shown, the heat dissipation body 400 may further include a pressing plate 440, where the pressing plate 440 is used to fix the gain fiber 300 to the top heat dissipation disk 410.

[0038] The setting of the above pressing plate 440 can play a certain vertical limiting role on the gain fiber 300 to prevent the gain fiber 300 from coming out of the limiting groove 430.

[0039] It should be noted that in this embodiment, the pressing plate 440 straddles multiple turns of the limiting groove 430. Specifically, one end of the pressing plate 440 is rotatably connected to the top heat dissipation plate 410 around the vertical axis, and the other end of the pressing plate 440 is a free end. When the gain fiber 300 needs to be installed in the limiting groove 430, the pressing plate 440 can be rotated to a position where it does not block the limiting groove 430; after the installation of the gain fiber 300 in the limiting groove 430 is completed, the pressing plate 440 can be rotated again to a position where it blocks the limiting groove 430, thereby realizing the limiting and fixing of the gain fiber 300.

[0040] Please continue to refer to Figure 3 , in this embodiment, the heat dissipation side wall 420 may include a liquid cooling cavity, a liquid inlet 421, and a liquid outlet 422. Specifically, the liquid inlet 421 and the liquid outlet 422 are both communicated with the liquid cooling cavity. The liquid inlet 421 is configured to allow the coolant to flow into the liquid cooling cavity, and the liquid outlet 422 is configured to allow the coolant to flow out of the liquid cooling cavity; the optical component 200 is arranged on the outer surface of the liquid cooling cavity, and the connecting optical fiber 100 is wound around the liquid cooling cavity.

[0041] During the operation of the fiber laser, the coolant flows into the liquid cooling cavity through the liquid inlet 421, and through the contact heat exchange method, takes away the heat generated by the connecting optical fiber 100 and the optical component 200 arranged in the liquid cooling cavity, realizing the heat dissipation treatment of the connecting optical fiber 100 and the optical component 200. Among them, the coolant that has completed the heat exchange flows out through the liquid outlet 422.

[0042] This method of using liquid cooling for heat dissipation has high heat dissipation efficiency and ensures the timeliness of heat conduction.

[0043] In this embodiment, the coolant can be cooling water.

[0044] In this embodiment, the material of the heat dissipation side wall 420 can be metal. This setting can increase the thermal conductivity of the heat dissipation side wall 420, thereby improving its heat dissipation efficiency.

[0045] Preferably, the material of the heat dissipation side wall 420 is copper or aluminum.

[0046] In this embodiment, the top heat dissipation plate 410 and the heat dissipation side wall 420 can be an integral structure. This setting can reduce the number of components in the heat dissipation main body 400, thereby facilitating the improvement of the assembly efficiency.

[0047] In this embodiment, a serpentine flow channel can be arranged in the liquid cooling cavity. Specifically, one end of the serpentine flow channel is connected to the liquid inlet 421, and the other end of the serpentine flow channel is connected to the liquid outlet 422.

[0048] By arranging a serpentine flow channel in the liquid cooling cavity, the flow path of the cooling liquid in the liquid cooling cavity can be extended, so as to fully take away the heat generated by the fiber laser during operation and ensure the reliability of heat dissipation.

[0049] In this embodiment, the heat dissipation main body 400 may further include heat dissipation fins (not shown in the figure) connected to the heat dissipation side wall 420. The heat dissipation fins extend towards the accommodation cavity, and the pump source is arranged below the heat dissipation fins. That is to say, the lower surface of the heat dissipation fins and the inner surface of the heat dissipation side wall 420 jointly construct a heat dissipation space for accommodating the pump source.

[0050] The arrangement of the above heat dissipation fins can enhance the heat dissipation effect, thereby improving the heat dissipation efficiency of the pump source.

[0051] In this embodiment, the heat dissipation fins and the heat dissipation side wall 420 may also be of an integral structure.

[0052] Figure 4 One of the schematic diagrams of the external shape of the fiber laser provided in this embodiment. Please continue to refer to Figure 3 , and in combination with Figure 4 , in this embodiment, the fiber laser may further include a housing 500. The pump source, the connecting optical fiber 100, the optical component 200, the gain optical fiber 300, and the heat dissipation main body 400 are all inside the housing 500, and the liquid inlet 421 and the liquid outlet 422 are exposed from the housing 500.

[0053] The arrangement of the above housing 500 realizes the accommodation of the pump source, the connecting optical fiber 100, the optical component 200, the gain optical fiber 300, and the heat dissipation main body 400. On the one hand, it can reduce the pollution caused by impurities to these components and play a certain protective role for these components. On the other hand, it can also ensure the neatness of the external structure of the fiber laser.

[0054] In this embodiment, the housing 500 may be a sheet metal part. This setting can reduce the weight of the housing 500, which is beneficial to the lightweight design of the structure of the fiber laser.

[0055] Figure 5 One of the schematic diagrams of the partial structure of the fiber laser provided in this embodiment; Figure 6 One of the schematic diagrams of the external shape of the fiber laser provided in this embodiment. Please continue to refer to Figure 3 , in this embodiment, the controller 600 and the drive board 700 of the fiber laser are both arranged inside the housing 500, and the drive board 700 straddles above the heat dissipation main body 400; the housing 500 is also provided with a start switch 510, a stop switch 520, an external interface 530, and an optical fiber outlet 540.

[0056] This setting not only uses the housing 500 to accommodate the controller 600 and the driving board 700, but also, by arranging the driving board 700 across the upper part of the heat dissipation body 400, it can indirectly achieve heat dissipation and temperature reduction of the driving board 700 by utilizing the cooling effect of the heat dissipation body 400 on the surrounding space. In addition, this layout of the driving board 700 can also reduce the occupation of the lateral space of the housing 500, thereby facilitating the reduction of the external dimensions of the fiber laser in this embodiment.

[0057] It should be noted that in this embodiment, the start switch 510, the stop switch 520, and the external interface 530 are all connected to the controller 600, and are respectively used to achieve the start, stop, and data transmission of the fiber laser; the fiber outlet 540 is used to connect to an external fiber. Among them, how to start the fiber laser using the start switch 510, how to stop the fiber laser using the stop switch 520, how to perform data transmission using the external interface 530, and how to connect to the external fiber using the fiber outlet 540 are all obtainable by those skilled in the art according to the prior art, and this embodiment has not made any improvements thereto, so it will not be elaborated further.

[0058] In this embodiment, the optical component 200 may include a beam combiner, a light stripper, a high reflection grating, a low reflection grating, and an output end cap. Specifically, along the laser emission path, the pump source, the connecting fiber 100, the beam combiner, the light stripper, the high reflection grating, the gain fiber 300, the low reflection grating, and the output end cap are arranged in sequence.

[0059] During the operation of this fiber laser, the laser emitted by the pump source is transmitted through the connecting fiber 100, and then passes through the beam combiner, the light stripper, the high reflection grating, the gain fiber 300, the low reflection grating, and the output end cap in sequence, and finally is output to the external fiber through the fiber outlet 540.

[0060] In this embodiment, the gain fiber 300 may be a thulium-doped fiber.

[0061] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the scope defined by the claims.

[0062] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0063] In the above embodiments, descriptions of orientations such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc. are all based on the figures shown.

[0064] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fiber laser, characterized in that: The invention comprises a pump source, a connecting optical fiber (100), an optical component (200), a gain optical fiber (300) and a heat dissipation body (400), wherein the heat dissipation body (400) comprises a top heat dissipation plate (410) and a heat dissipation side wall (420) arranged around the top heat dissipation plate (410), wherein the top heat dissipation plate (410) and the heat dissipation side wall (420) together form a receiving cavity, wherein the pump source is arranged in the receiving cavity; the optical component (200) is arranged on the outer surface of the heat dissipation side wall (420); the connecting optical fiber (100) is coiled on the outer surface of the heat dissipation side wall (420), one end of the connecting optical fiber (100) is connected to the pump source, and the other end of the connecting optical fiber (100) is connected to the optical component (200); and the gain optical fiber (300) is arranged on the outer surface of the top heat dissipation plate (410).

2. The fiber laser according to claim 1, characterized in that: The top heat dissipation plate (410) is elliptical in shape, and the heat dissipation side wall (420) is vertically connected to the top heat dissipation plate (410).

3. The fiber laser according to claim 1, characterized in that: The top heat dissipation plate (410) is provided with a limiting groove (430), the limiting groove (430) is arranged in a spiral around the center of the top heat dissipation plate (410), and the gain optical fiber (300) is arranged in the limiting groove (430).

4. The fiber laser according to claim 1, characterized in that: The heat dissipation side wall (420) comprises a liquid cooling cavity, a liquid inlet (421) and a liquid outlet (422), wherein the liquid inlet (421) and the liquid outlet (422) are both in communication with the liquid cooling cavity, wherein the optical component (200) is arranged on the outer surface of the liquid cooling cavity, and the connecting optical fiber (100) is coiled in the liquid cooling cavity; the liquid inlet (421) is configured to allow cooling liquid to flow into the liquid cooling cavity, and the liquid outlet (422) is configured to allow cooling liquid to flow out of the liquid cooling cavity.

5. The optical fiber laser according to claim 4, characterized in that: The liquid cooling chamber is provided with a serpentine flow channel, one end of the serpentine flow channel is connected to the liquid inlet (421), and the other end of the serpentine flow channel is connected to the liquid outlet (422).

6. The fiber laser according to claim 4, characterized in that: The fiber laser further comprises a housing (500), the pump source, the connecting optical fiber (100), the optical component (200), the gain optical fiber (300) and the heat dissipation body (400) are all located inside the housing (500), and the liquid inlet (421) and the liquid outlet (422) are exposed from the housing (500).

7. The optical fiber laser according to claim 6, characterized in that: The controller (600) and the driving board (700) of the fiber laser are both arranged inside the housing (500), and the driving board (700) is arranged across the top of the heat dissipation body (400); the housing (500) is also provided with a start switch (510), a stop switch (520), an external interface (530) and a fiber optic outlet (540).

8. The fiber laser according to claim 1, characterized in that: The optical component (200) comprises a beam combiner, a light stripper, a high-reflection grating, a low-reflection grating and an output end cap. Along the laser emission path, the pump source, the connecting optical fiber (100), the beam combiner, the light stripper, the high-reflection grating, the gain optical fiber (300), the low-reflection grating and the output end cap are arranged in sequence.

9. The optical fiber laser according to claim 1, characterized in that: The heat dissipation body (400) further comprises a heat dissipation fin connected to the heat dissipation side wall (420), the heat dissipation fin extending in the direction of the accommodating cavity, and the pump source being arranged below the heat dissipation fin.

10. The optical fiber laser according to claim 1, characterized in that: The heat dissipation side wall (420) is made of metal; and / or the gain optical fiber (300) is a thulium-doped optical fiber; and / or the top heat dissipation plate (410) and the heat dissipation side wall (420) are an integrated structure; and / or the heat dissipation body (400) further includes a pressing plate (440), and the pressing plate (440) is used to fix the gain optical fiber (300) to the top heat dissipation plate (410).

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